藤井研究室 Fujii Research Group

2025

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  Orthorhombic (NH₄,Li)Eu(MoO₄)₂ Solid Solution: Crystal Structure and Red-Emitting Photoluminescence

  TakuyaT. Hasegawa, SuzukaS. Noda, KotaroK. Fujii, MasatomoM. Yashima, TomoyoT. Goto, YasushiY. Sato, Ayahisa Okawa and ShuA. Yin

  Inorg. Chem., 64, 34, 17368-17378, 2025

  Grant/Award: JRR-3: J-PARC: SPring-8: PF:2023P003 KAKENHI: JP22K05264 and JP20H00297

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  Effects of the anion exchange between I^- and NCS^- coordinated to Co²⁺-centered tetrahedra in the organic-inorganic hybrid halides

  TakuyaT. Ohmi, RyujuR. Ito, Sergey A.S. Nikolaev, KotaroK. Fujii, Iain W. H.I. Oswald, KokiK. Matsushima, YuigaY. Nakamura, James R.J. Neilson, MasatomoM. Yashima, Masaki Azuma and TakafumiM. Yamamoto

  Dalton Trans., 54, , 10773-10780, 2025

  Grant/Award: JRR3: J-PARC: SPring-8: 2024A1508, 2022A1191 PF: KAKENHI, JP22H05147, JP23H04618, and JP22H01767

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  Flux crystal growth, structure, and optical properties of non-centrosymmetric oxysulfides Ln₃Ga₃Ge₂S₃O₁₀ (Ln = La, Ce, Pr, Nd)

  HongH. Yan, KotaroK. Fujii, YoshitakaY. Matsushita, MasatomoM. Yashima, Kazunari Yamaura and YoshihiroK. Tsujimoto

  Dalton Trans., 54, , 10433-10440, 2025

  Grant/Award: JRR3: J-PARC: 2023PM2001, 2024PM2001, and 2025PM2002 SPring-8: PF: KAKENHI, 25K01507, 25K01657, and 25H01652 WPI

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  High Proton Conductivity in Nb⁵⁺-doped BaScO_2.5

  KeiK. Saito, MitsukiM. Baba, KenseiK. Umeda, KotaroK. Fujii, TakashiT. Honda, MasatomoM. Yashima

  Inorg. Chem. Front., XX, X, XXXX-XXXX, 2025

  Grant/Award: JRR-3: Proposals 24609 J-PARC: 2024A0178 and 2020L0804 SPring-8: PF: KAKENHI, JP21K18182, JP23K04887, JP23H04618, and JP24H00041 A-STEP ASPIRE MAREC

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  High Oxide-Ion Conduction in Rb-Containing Oxides

  YutaY. Yasui, KazuakiK. Jojima, KotaroK. Fujii, KazuhiroK. Mori, MasatomoM. Yashima

  Chem. Mater., 37, 3, 1231-1243, 2025

  Grant/Award: JRR-3: Proposals 21578, 22610, 22603 and 22614 J-PARC: 2020L0801, 2020L0804, 2020A0085, and 2020A0137 SPring-8: 2021B1319, 2021A1599, 2021B1826 and 2022B0569 PF: 2020G547, 2021G615 and 2021G549 KAKENHI, JP21K18182, JP22H04504, JP23K04887, JP23H04618, and JP24H00041 A-STEP ASPIRE MAREC

2024

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  Solid-State ⁹⁵Mo and ⁹³Nb NMR Study of Ba₇Nb₄MoO₂₀-Based Materials and Ba₇Ta_3.7Mo_1.3O_20.15

  MasatakaM. Tansho, AtsushiA. Goto, ShinobuS. Ohki, YuukiY. Mogami, YutaY. Yasui, YuichiY. Sakuda, KotaroK. Fujii, TakahiroT. Iijima, MasatomoM. Yashima

  J. Phys. Chem. C, 128, 46, 19679-19687, 2024

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  High proton conduction by full hydration in highly oxygen deficient perovskite

  KeiK. Saito, KenseiK. Umeda, KotaroK. Fujii, KazuhiroK. Mori, MasatomoM. Yashima

  J. Mater. Chem. A, 12, 22, 13310-13319, 2024

  Grant/Award: JRR-3 Proposal No. 23627, 23623, 23613, 22614, 22610, and 22603; J-PARC: Proposal No. 2020L0804, 2020L0802, 2020L0801 SPring-8: 2023B2100, 2023A1684, 2022B0569, 2022B1195, and 2022A1270; PF: 2023G514, 2022G554, 2021G615, and 2021G549 ASPIRE A-STEP JP21K18182, JP22H04504, JP23K04887, JP23H04618, and JP24H00041 MAREC,

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  High Conductivity and Diffusion Mechanism of Oxide Ions in Triple Fluorite-Like Layers of Oxyhalides

  NachiN. Ueno, HiroshiH. Yaguchi, KotaroK. Fujii, MasatomoM. Yashima

  J. Am. Chem. Soc., 146, 16, 11235-11244, 2024

  Grant/Award: JP19H00821, JP21K18182, JP22H04504, JP23K04887, JP23H04618, JP24H00041, A-STEP, ASPIRE, MAREC,

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  Anionic Sublattices in Halide Solid Electrolytes: A Case Study with the High-Pressure Phase of Li3ScCl6

  FenghuaF. Ding, AtsunoriA. Doi, TakafumiT. Ogawa, HirokiH. Ubukata, TongT. Zhu, DaichiD. Kato, CedricC. Tassel, ItaruI. Oikawa, NaokiN. Inui, SatoruS. Kuze, TsutomuT. Yamabayashi, KotaroK. Fujii, MasatomoM. Yashima, XingX. Ou, ZhijianZ. Wang, XiaoboX. Min, KojiK. Fujita, HitoshiH. Takamura, AkihideA. Kuwabara, TianrenT. Zhang, Kent JK. Griffith, ZhangZ. Lin, LiyuanL. Chai, HiroshiH. Kageyama

  Angew. Chem. Int. Ed., 63, 15, e202401779, 2024

  Grant/Award: JP22H05143, JP22H05146, JP23H04618

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  Synthesis, crystal structure and investigation of ion-exchange possibility for sodium tellurate NaTeO3(OH)

  TsubasaT. Ishii, Yue JinY. Shan, KotaroK. Fujii, TetsuhiroT. Katsumata, HideoH. Imoto, AriunaaA. Baterdene, KeitaroK. Tezuka, MasatomoM. Yashima

  Dalton Trans., 53, 12, 5373-5381, 2024

  Grant/Award: JP23H04618

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  Structural and electrical properties of Bi₃GaSb₂O₁₁ at high temperatures

  KoheiK. Matsuzaki, WenruiW. Zhang, KeiK. Saito, KotaroK. Fujii, MasatomoM. sYashima

  J. Solid State Chem., 329, -, 124380,2024

  Grant/Award: JP19H00821, JP20K20293, JP21K20483, JP21K18182, JP22H04504, A-STEP SOIFIT MAREC , ND 2020L0802, 2021PM2002, 2022PM2002, 22603, 22610, and 22614, SR 2021G615, 2021G549, 2022G554, 2021A1599, 2021B1826, and 2022A1270

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  Strongly Enhanced Polarization in a Ferroelectric Crystal by Conduction-Proton Flow

  JunichiJ. Yanagisawa, TakuyaT. Aoyama, KotaroK. Fujii, MasatomoM. Yashima, YoshiyukiY. Inaguma, AkihideA. Kuwabara, KazukiK. Shitara, Benjamin LeB. Ouay, ShinyaS. Hayami, MasaakiM. Ohba, RyoR. Ohtani

  J. Am. Chem. Soc., 146, 2, 1476-1483, 2024

  Grant/Award: JP22H05144, JP22H05146 and JP23H04618, JP21K18936, JP21H01905, and JP21K18182,

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  Structure analysis and luminescence properties of red-emitting iodide scintillators with potassium-hexachloroplatinate(IV) type structure

  ShoheiS. Kodama, ShunsukeS. Kurosawa, KotaroK. Fujii, MasatomoM. Yashima, AkihiroA. Yamaji, AkiraA. Yoshikawa

  J. Alloys Compd., 970, -, 172506, 2024

2023

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  Dimer-Mediated Cooperative Mechanism of Ultrafast-Ion Conduction in Hexagonal Perovskite-Related Oxides

  YuichiY. Sakuda, TaitoT. Murakami, MaximM. Avdeev, KotaroK. Fujii, YutaY. Yasui, James R.J. Hester, MasatoM. Hagihala, YoichiY. Ikeda, YusukeY. Nambu, MasatomoM. Yashima

  Chem. Mater., 35, 22, 9774-9788, 2023

  Grant/Award: JP19H00821, JP19K23647, JP21K14701, JP21K18182, JP22H04504, JP23K04887, JP23H04618, JP21H03732, JP22H05145, J-PARC: Proposal Nos. 2017L1301, 2017L1302, 2020L801; ANSTO: Proposal No. PP5198; JAEAISSP (JRR-3): Proposal Nos. 22410(IRT), 22603, 22610, 22614, 21578).

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  Thiocyanate-Stabilized Pseudo-cubic Perovskite CH(NH₂)₂PbI₃ from Coincident Columnar Defect Lattices

  TakuyaT. Ohmi, Iain W. H.I. Oswald, James R.J. Neilson, NikolajN. Roth, ShuntaS. Nishioka, KazuhikoK. Maeda, KotaroK. Fujii, MasatomoM. Yashima, MasakiM. Azuma, and Takafumia. Yamamoto

  J. Am. Chem. Soc., 145, 36, 19759-19767, 2023

  Grant/Award: JP23H04618

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  Synthesis and ionic conductivity of an argyrodite-type Li₆SbS₅I electrolyte

  TakuyaT. Kimura, RyoR. Izawa, ChieC. Hotehama, KotaroK. Fujii, AtsushiA. Sakuda, MasatomoM. Yashima, MasahiroM. Tatsumisago, AkitoshiA. Hayashi

  Solid State Ionics, 399, -, 116287, 2023

  Grant/Award: J-PARC (2019B0202, 2022 PM2002) JP18H05255, JP19H04705, JP19H05812

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  La₄Ga₂S₈O₃: A Rare-Earth Gallium Oxysulfide with Disulfide Ions

  HongH. Yan, KotaroK. Fujii, HouriaH. Kabbour, AkiraA. Chikamatsu, YuY. Meng, YoshitakaY. Matsushita, MasatomoM. Yashima, KazunariK. Yamaura, YoshihiroY. Tsujimoto

  Inorg. Chem., 62, 26, 10481-10489, 2023

  Grant/Award: JP23H04618 MAREC

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  High proton conduction in Ba₂LuAlO₅ with highly oxygen-deficient layers

  RihoR. Morikawa, TaitoT. Murakami, KotaroK. Fujii, MaximM. Avdeev, YoichiY. Ikeda, YusukeY. Nambu, MasatomoM. Yashima

  Commun. Mater., 4, 1, 42, 2023

  Grant/Award: ISSP 22603, 22610, 22614, 21578, MLF 2020L0801, SXRD 2021B1826, 2021G615, JP19H00821, JP19K23647, JP21K14701, JP21K18182, JP21H03732, JP22H04504, JP22H05145, JP23K04887, JP23H04618, A-STEP SOIFIT MAREC

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  Hidden chemical order in disordered Ba₇Nb₄MoO₂₀ revealed by resonant X-ray diffraction and solid-state NMR

  YutaY. Yasui, MasatakaM. Tansho, KotaroK. Fujii, YuichiY. Sakuda, AtsushiA. Goto, ShinobuS. Ohki, YuukiY. Mogami, TakahiroT. Iijima, ShintaroS. Kobayashi, ShogoS. Kawaguchi, KeiichiK. Osaka, KazutakaK. Ikeda, Toshiya Otomo & MasatomoT. Yashima

  Nat. Commun., 14, -, 2337, 2023

  Grant/Award: MLF 2019BF2106, 2020L0801, 2020L0804, SXRD 2019A1052, 2020A1730, 2021A1599, 2021B1826, JP19H00821, JP20J23124, JP21J22818, JP21K18182, JP22H04504, A-STEP SOIFIT MAREC

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  Supramolecular multi-electron redox photosensitisers comprising a ring-shaped Re(i) tetranuclear complex and a polyoxometalate

  MariaM. Takahashi, TsuyoshiT. Asatani, TatsukiT. Morimoto, YoshinobuY. Kamakura, KotaroK. Fujii, MasatomoM. Yashima, NaokiN. Hosokawa, YusukeY. Tamaki, OsamuO. Ishitani

  Chem. Sci., 14, 3, 691-704, 2023

  Grant/Award: /

2022

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  Ge-Containing Oxide-Ion Conductors with CaEu₂Ge₃O₁₀-Type Structure Discovered by the Bond-Valence Method and Experiments

  MasahiroM. Matsui, KotaroK. Fujii, MasahiroM. Shiraiwa, MasatomoM. Yashima

  Inorg. Chem, 61, 31, 12327-12336, 2022

  Grant/Award: 2020G547, 2021G615, 2021G549, 2016A1265, JP16H06438, JP19H00821, JP20H05184, JP20K05086, JP21K18182, JP22H04504, JPMJTM19AY, SOIFIT, MAREC

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  Different Local Structures of Mo and Nb Polyhedra in the Oxide-Ion-Conducting Hexagonal Perovskite-Related Oxide Ba₃MoNbO_8.5 Revealed by ⁹⁵Mo and ⁹³Nb NMR Measurements

  MasatakaM. Tansho, AtsushiA. Goto, ShinobuS. Ohki, YuukiY. Mogami, YuichiY. Sakuda, YutaY. Yasui, TaitoT. Murakami, KotaroK. Fujii, TakahiroT. Iijima, and Masatomoa. Yashima

  J. Phys. Chem. C, 126, 31, 13284-13290, 2022

  Grant/Award: JP21K18182, JP19H00821

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  Bi₁₂O₁₇Cl₂ with a Sextuple Bi-O Layer Composed of Rock-Salt and Fluorite Units and its Structural Conversion through Fluorination to Enhance Photocatalytic Activity

  DaichiD. Kato, OsamuO. Tomita, RykyR. Nelson, Maria A.M. Kirsanova, RichardR. Dronskowski, HajimeH. Suzuki, ChengchaoC. Zhong, CedricC. Tassel, KohdaiK. Ishida, YosukeY. Matsuzaki, Craig M.C. Brown, KojiK. Fujita, KotaroK. Fujii, MasatomoM. Yashima, YojiY. Kobayashi, AkinoriA. Saeki, ItaruI. Oikawa, HitoshiH. Takamura, RyuR. Abe, HiroshiH. Kageyama, Tatiana E.T. Gorelik, Artem M.A. Abakumov

  Adv. Func. Mater., 32, 41, 2204112, 2022

  Grant/Award: 2020A0085, 2020PM2002

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  Simultaneous Reduction of Proton Conductivity and Enhancement of Oxide-Ion Conductivity by Aliovalent Doping in Ba7Nb4MoO20

  YukiY. Suzuki, TaitoT. Murakami, KotaroK. Fujii, James R.J. Hester, YutaY. Yasui, MasatomoM. Yashima

  Inorg. Chem., 61, 19, 7537-7545, 2022

  Grant/Award: 8693, 8694, 9400, 9821, 2020G547, 2021B1826, 2020L0801, 2021G549, 2021G615, JP19H00821, JP19K23647, JP20K05086, JP21K14701, JP21K18182, SOIFIT, MAREC

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  Synthesis of Hydride-Doped Perovskite Stannate with Visible Light Absorption Capability

  MasashiM. Nakamura, HirofumiH. Akamatsu, KotaroK. Fujii, YusukeY. Nambu, YoichiY. Ikeda, TomokiT. Kanazawa, ShunsukeS. Nozawa, MasatomoM. Yashima, KatsuroK. Hayashi, KazuhikoK. Maeda

  Inorg. Chem., 61, 17, 6584-6593, 2022

  Grant/Award: JP16H06440, JP16H06441, 21578, 22063, 22614, 22610, 2021A1599, 2021B1826

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  Ruddlesden-Popper Oxychlorides Ba₃Y₂O₅Cl₂, Sr₃Sc₂O₅Cl₂, and Sr₂ScO₃Cl: First Examples of Oxide-Ion-Conducting Oxychlorides

  HiroshiH. Yaguchi, KotaroK. Fujii, YoshinoriY. Tsuchiya, HirakuH. Ogino, YoshihiroY. Tsujimoto, MasatomoM. Yashima

  ACS Appl. Energy Mater., 5, 1, 295-304, 2022

  Grant/Award: JP21K18182, JP20H05184, JP20K05086, JP19H00821, JP17H06222, JP16H06293, JP16H06440, JP16H06438, JP16H06439, SOIFIT, MAREC, 8693, 8694, 2020G547, 2021G549, 2021G615, JPMJSP2106

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  First-Principles Analysis of the Oxide-Ion Conduction Mechanism in Si-Deficient Lanthanum Silicate Apatite

  YusukeY. Ogura, TatsuyaT. Yokoi, KotaroK. Fujii, MasatomoM. Yashima, KatsuyukiK. Matsunaga

  J. Phys. Chem. C, 126, 13, 5805-5812, 2022

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  Oxide-ion and proton conductivity of the ordered perovskite BaYM_1/3Ga_2/3O_2.5

  KeiK. Saito, KotaroK. Fujii, MasatomoM. Yashima

  J. Solid State Chem., 306, , 122733, 2022

  Grant/Award: 2020A0137, 2020PM2002, JP17K17717, JP17H06222, JP19H00821, 20H05184, 20K05086, JP21K18182, SOIFIT, MAREC

2021

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  High oxide-ion conductivity through the interstitial oxygen site in Ba₇Nb₄MoO₂₀-based hexagonal perovskite related oxides

  MasatomoM. Yashima, TakafumiT. Tsujiguchi, YuichiY. Sakuda, YutaY. Yasui, YuY. Zhou, KotaroK. Fujii, ShukiS. Torii, TakashiT. Kamiyama, Stephen J.S. Skinner

  Nat. Commun., 12, , 556, 2021

  Grant/Award: 2017A0111, 2017L1301, JP15H02291, JP16H00884, JP16H06293, JP16H06440, JP16H06441, JP16H06438, JP16K21724, JP17K17717, JP17H06222, JP19H00821, A-STEP SOIFIT

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  Hydride-based antiperovskites with soft anionic sublattices as fast alkali ionic conductors

  ShenghanS. Gao, ThibaultT. Broux, SusumuS. Fujii, CedricC. Tassel, KentaroK. Yamamoto, YaoY. Xiao, HirokiH. Ubukata, YukiY. Watanabe, KotaroK. Fujii, MasatomoM. Yashima, AkihideA. Kuwabara, YoshiharuY. Uchimoto, HiroshiH. Kageyama

  Nat. Commun., 12, , 151, 2021

  Grant/Award: 2019A0017, 2017L1302 JP16H06440; JP16H06441

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  Mixed alkali-ion transport and storage in atomic-disordered honeycomb layered NaKNi2TeO6

  TitusT. Masese, YoshinobuY. Miyazaki, JosefJ. Rizell, Godwill MbitiG. Kanyolo, Chih-YaoC. Chen, HirokiH. Ubukata, KeigoK. Kubota, KartikK. Sau, TamioT. Ikeshoji, Zhen-DongZ. Huang, KazukiK. Yoshii, TeruoT. Takahashi, MiyuM. Ito, HiroshiH. Senoh, JinkwangJ. Hwang, KazuhikoK. Matsumoto, ToshiyukiT. Matsunaga, KotaroK. Fujii, MasatomoM. Yashima, MasahiroM. Shikano, CedricC. Tassel, HiroshiH. Kageyama, YoshiharuY. Uchimoto, RikaR. Hagiwara, TomohiroT. Saito

  Nat. Commun., 12, , 4660, 2021

  Grant/Award: 2017L1302 and 2020L0802 JP19H00821 and JP20K05086

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  High Oxide-Ion Conductivity in a Hexagonal Perovskite-Related Oxide Ba₇Ta_3.7Mo_1.3O_20.15 with Cation Site Preference and Interstitial Oxide Ions

  TaitoT. Murakami, ToshiyaT. Shibata, YutaY. Yasui, KotaroK. Fujii, James R.J. Hester, MasatomoM. Yashima

  Small, , ,2106785, 2021

  Grant/Award: 2020A1730 8694 JP19H00821, JP19K23647, 21K14701, and JP21K18182 SOIFIT MAREC

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  High-temperature proton conductors based on the (110) layered perovskite BaNdScO₄

  MasahiroM. Shiraiwa, TakafusaT. Kido, KotaroK. Fujii, MasatomoM. Yashima

  J. Mater. Chem. A, 9, 13, 8607-8619, 2021

  Grant/Award: 2017L1302 JP15H02291, JP26870190, JP16H00884, JP16H06293, JP16H06440, JP16H06438, JP16K21724, 17K17717, 17H06222, 19H00821, 20H05184, and 20K05086 SOIFIT

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  Protonic conduction in BaNdInO₄ structure achieved by acceptor doping

  YuY. Zhou, MasahiroM. Shiraiwa, MasanoriM. Nagao, KotaroK. Fujii, IsaoI. Tanaka, MasatomoM. Yashima, LauraL. Baque, Juan F.J. Basbus, LilianaL. Mogni, Stephen J.S. Skinner

  Chem. Mater., 33, 6, 2139-2146, 2021

  Grant/Award: xxx

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  A Sn-Based Perovskite with a Wide Visible Light Absorption Band Assisted by Hydride Doping

  MasashiM. Nakamura, HiroshiH. Watanabe, HirofumiH. Akamatsu, KotaroK. Fujii, MasatomoM. Yashima, GeorgeG. Hasegawa, MikiM. Inada, KatsuroK. Hayashi, KazuhikoK. Maeda

  Chem. Mater., 33, 10, 3631-3638, 2021

  Grant/Award: JP16H06440 and JP16H06441

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  Site-Selective Eu3+ Luminescence in the Monoclinic Phase of YSiO2N

  YuukiY. Kitagawa, JumpeiJ. Ueda, KotaroK. Fujii, MasatomoM. Yashima, ShiroS. Funahashi, TakayukiT. Nakanishi, TakashiT. Takeda, NaotoN. Hirosaki, KentaK. Hongo, RyoR. Maezono, SetsuhisaS. Tanabe

  Chem. Mater., 33, 22, 8873-8885, 2021

  Grant/Award: JP16H06438, JP16H06439, JP16H06440, and JP16H06441 2017A0023 and 2017A0064

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  Experimental visualization of the interstitialcy diffusion of anions in an LaOF-based oxyfluoride La0.9Sr0.1O0.45F2

  KeisukeK. Hibino, MahiroM. Tanaka, SatoshiS. Kozakai, KotaroK. Fujii, TatsumiT. Ishihara, James R.J. Hester, MasatomoM. Yashima

  ACS Appl. Energy Mater., 4, 9, 8891-8900, 2021

  Grant/Award: PP51985, 2017L1301 2017B1265 and 2018A1259 JP15H02291, JP16H00884, JP16H06293, JP16H06440, JP16H06441, JP16H06438, JP16K21724, JP17K17717, JP17H06222, JP19H00821, JP20H05184, JP20K05086, and JP21K18182 17576 and 18584 SOIFIT MAREC

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  Kinetically Stabilized Cation Arrangement in Li3YCl6 Superionic Conductor during Solid-State Reaction

  HiroakiH. Ito, KazukiK. Shitara, YongmingY. Wang, KotaroK. Fujii, MasatomoM. Yashima, YosukeY. Goto, ChikakoC. Moriyoshi, Nataly CarolinaN. Rosero-Navarro, AkiraA. Miura, KiyoharuK. Tadanaga

  Adv. Sci., 8, 15, 2101413

  Grant/Award: JP16H06440

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  Na+ diffusion mechanism and transition metal substitution in tunnel-type manganese-based oxides for Na-ion rechargeable batteries

  IreneI. Quinzeni, KotaroK. Fujii, MarcellaM. Bini, MasatomoM. Yashima, CristinaC. Tealdi

  Mater. Adv., 3, ,986-997 , 2021

  Grant/Award: xxx

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  Electrochemical Crystal Growth of Titanium Oxyfluorides-A Strategy for Development of Electron-Doped Materials

  YusukeY. Chiba, KengoK. Shibata, HiroshiH. Takatsu, KotaroK. Fujii, MiwaM. Saito, HiroshiH. Kageyama, KazuhikoK. Maeda, MasatomoM. Yashima, TerukiT. Motohashi

  Inorg. Chem., 60, 19, 14613-14621, 2021

  Grant/Award: JP16H6439, JP16H6440, JP16H6441

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  Ionic conduction mechanism in Ca-doped Lanthanum Oxychloride

  KazukiK. Shitara, AkihideA. Kuwabara, KeisukeK. Hibino, KotaroK. Fujii, MasatomoM. Yashima, James R.J. Hester, MasanoriM. Umeda, NaoyoshiN. Nunotani, NobuhitoN. Imanaka

  Dalton Trans., 50, 1, 151-156, 2021

  Grant/Award: PPR5628 and 2017B1265 16H06440 17576

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  Effect of La vacancies on the oxide-ion conduction in lanthanum silicate apatites

  YusukeY. Ogura, TatsuyaT. Yokoi, KotaroK. Fujii, MasatomoM. Yashima, KatsuyukiK. Matsunaga

  Solid State Ionics, 373, 15, 115793, 2021

  Grant/Award: xxx

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  Ternary carbodiimide compound, Ba_0.9Sr_0.1NCN with distorted rutile-type structure

  YujiY. Masubuchi, SuzukaS. Miyazaki, KotaroK. Fujii, MasatomoM. Yashima, AkiraA. Miura, MikioM. Higuchi

  J. Solid State Chem., 296, , 122000, 2021

  Grant/Award: 2017L1302 2018B1246 JP16H06438, JP16H06439, JP16H06440

2020

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  Oxide-ion conduction in the Dion–Jacobson phase CsBi₂Ti₂NbO_10−δ

  WenruiW. Zhang, KotaroK. Fujii, EikiE. Niwa, MasatoM. Hagihala, TakashiT. Kamiyama, MasatomoM. Yashima

  Nat. Commun., 11, , 1224, 2020

  Grant/Award: JP15H02291, JP16H00884, JP16H06293, JP16H06440, JP16H06441, JP16H06438, JP16K21724, JP17K17717, JP17H06222, and JP19H00821, MLF 2017A0111 and 2017L1301, SP8 2017A1803, 2017B1265, 2018A1259, 2018B1056, and 2019A1052, SOIFIT

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  Dion–Jacobson-type oxide-ion conductor CsLa₂Ti₂NbO_10−δ without phase transitions

  WenruiW. Zhang, KotaroK. Fujii, TomohiroT. Ishiyama, HarueH. Kandabashi, MasatomoM. Yashima

  J. Mater. Chem. A, 8, 47, 25085-25093, 2020

  Grant/Award: JP15H02291, JP16H00884, JP16H06293, JP16H06440, JP16H06441, JP16H06438, JP16K21724, JP17K17717, JP17H06222, and JP19H00821, MLF 2017A0111, 2017L1300, 2017L1301 and 2017L1302, SP8 2017A1803, 2017B1265, 2018A1259, 2018B1056 and 2019A1052, SOIFIT

• 

  Synthesis, structure and luminescence properties of layered oxychloride Ba₃Y₂O₅Cl₂

  YukiY. Iwasa, YuY. Su, YoshinoriY. Tsuchiya, MakotoM. Tatsuda, KohjiK. Kishioa, TakayukiT. Yanagida, FumiF. Takada, TaichiroT. Nishio, YoshihiroY. Tsujimoto, KotaroK. Fujii, MasatomoM. Yashima, HirakuH. Ogino

  J. Mater. Chem. C, 8, 48, 17162-17168, 2020

  Grant/Award: xxx

• 

  Strain-induced creation and switching of anion vacancy layers in perovskite oxynitrides

  TakafumiT. Yamamoto, AkiraA. Chikamatsu, ShunsakuS. Kitagawa, NanaN. Izumo, ShunsukeS. Yamashita, HiroshiH. Takatsu, MasayukiM. Ochi, TakahiroT. Maruyama, MoritoM. Namba, TakahideT. Nakashima, FumitakaF. Takeiri, KotaroK. Fujii, MasatomoM. Yashima, YukiY. Sugisawa, MasahitoM. Sano, YasushiY. Hirose, DaiichiroD. Sekiba, Craig M.C. Brown, TakashiT. Honda, KazutakaK. Ikeda, ToshiyaT. Otomo, KazuhikoK. Kuroki, KenjiK. Ishida, TakaoT. Mori, KojiK. Kimoto, TetsuyaT. Hasegawa, HiroshiH. Kageyama

  Nat. Commun., 11, , 5923, 2020

  Grant/Award: JP16H06438, JP16H06439, JP16H06440, JP16H06441, JP16K21724, JP17H05481, JP18H01860, 20H00384,

• 

  Cation- and anion-ordered rutile-type derivative LiTeO₃(OH)

  KotaroK. Fujii, YumeY. Yoshida, Yue JinY. Shan, KeitaroK. Tezuka, YoshiyukiY. Inaguma, MasatomoM. Yashima

  Chem. Commun., 56, 69, 10042-10045, 2020

  Grant/Award: JP16H06438, 16H06439, JP16H06440, JP16K21724, JP17H06222, 19H00821, 20H05184, and 20K05086, MLF 2018B0043, 2018PM0009, 2019A0017, SP8 2016A1265

• 

  Responsive four-coordinate Fe(II) nodes in FePd(CN)₄

  RyoR. Ohtani, HiromuH. Matsunari, TakafumiT. Yamamoto, KojiK. Kimoto, MasaakiM. Isobe, Kotaro Fujiie MasatomoK. Yashima, SusumuS. Fujii, AkihideA. Kuwabara, YuhY. Hijikata, Shin-ishiroS. Noro, MasaakiM. Ohba, HiroshiH. Kageyama, ShinyaS. Hayami

  Angew. Chem. Int. Ed., 59, 43, 19254-19259, 2020

  Grant/Award: MLF 2017B0143, 2017L1302, SP8 2018A1259, 2019A1104

• 

  Synthesis of Three-layer Perovskite Oxynitride K2Ca2Ta3O9N·2H2O and Photocatalytic Activity for H2 Evolution under Visible Light

  YaY. Tang, KosakuK. Kato, TakayoshiT. Oshima, HirotoH. Mogi, AkinobuA. Miyoshi, KotaroK. Fujii, Kei-ichiK. Yanagisawa, KojiK. Kimoto, AkiraA. Yamakata, MasatomoM. Yashima, KazuhikoK. Maeda

  Inorg. Chem., 59, 15, 11122-11128, 2020

  Grant/Award: xxx

• 

  New Structure Family of Oxide-ion Conductors Based on BaGdInO4

  HiroshiH. Yaguchi, KotaroK. Fujii, MasatomoM. Yashima

  J. Mater. Chem. A, 8, 17, 8638-8647, 2020

  Grant/Award: JP19H00821, JP17H06222, JP16H06293, JP16H06440, JP16H00884, and JP16H06438, SP8 2017A1803

• 

  Single-crystal growth, structure and luminescence properties of Cs2HfCl3Br3

  ShoheiS. Kodama, ShunsukeS. Kurosawa, KotaroK. Fujii, TaitoT. Murakami, MasatomoM. Yashima, JanJ. Pejchal, RobertR. Král, MartinM. Nikl, AkihiroA. Yamaji, MasaoM. Yoshino, SatoshiS. Toyoda, HirokiH. Sato, YujiY. Ohashi, KeiK. Kamada, YuuiY. Yokota

  Opt. Mater., 106,, 109942, 2020

  Grant/Award: xxx

• 

  Crystalline Li₂CaSiO₄ as a highly active catalyst for oxidative coupling of methane

  TomohiroT. Matsumoto, MiwaM. Saito, SatoshiS. Ishikawa, KotaroK. Fujii, MasatomoM. Yashima, WataruW. Ueda, TerukiT. Motohashi

  ChemCatChem, 12, 7, 1968-1972, 2020

  Grant/Award: xxx

• 

  Two-Dimensional Perovskite Oxynitride K₂LaTa₂O₆N with an H⁺/K⁺ Exchangeability in Aqueous Solution to Form Stable Photocatalyst for Visible‐Light H₂ Evolution

  TakayoshiT. Oshima, TomT. Ichibha, KenjiK. Oqmhula, KeisukeK. Hibino, HirotoH. Mogi, ShunsukeS. Yamashita, Kotaro Fujii. YugoK. Miseki, KentaK. Hongo, DalingD. Lu, RyoR. Maezono, KazuhiroK. Sayama, MasatomoM. Yashima, KojiK. Kimoto, HidekiH. Kato, MasatoM. Kakihana, HiroshiH. Kageyama, KazuhikoK. Maeda

  Angew. Chem. Int. Ed., 132, 24, 9823-9830, 2020

  Grant/Award: xxx

• Preparation and thermal stability of oxynitride perovskite solid solution Sr1-xLaxTa1-xTixO2N

  YujiY. Masubuchi, SotaS. Ohtaki, KotaroK. Fujii, MasatomoM. Yashima, MikioM. Higuchi, ShinichiS. Kikkawa

  J. Eur. Ceram. Soc., 40, 16, 6288-6292,2020

  Grant/Award: MLF 2017A0023 and 2017A0064

2019

• 

  Polymorphism and Temperature-Induced Phase Transitions of Na₂CoP₂O₇

  MaximM. Avdeev, Chin-WeiC. Wang, PrabeerP. Barpanda, KotaroK. Fujii, MasatomoM. Yashima

  Inorg. Chem., 58, 24, 16823-16830, 2019

  Grant/Award: xxx

• 

  Discovery of a Rare-Earth-Free Oxide-Ion Conductor Ca₃Ga₄O₉ by Screening through Bond Valence-Based Energy Calculations, Synthesis, and Characterization of Structural and Transport Properties

  YutaY. Yasui, EikiE. Niwa, MasahiroM. Matsui, KotaroK. Fujii, MasatomoM. Yashima

  Inorg. Chem., 58, 14, 9460-9468, 2019

  Grant/Award: 15H02291, 16H00884, 16H06293, 16H06440, 16H06438, 17K17717, 17H06222, and 19H00821, iMATERIA, 2017A0023; SPICA, 2017L1302, SOIFIT, SP8 2017B1265

• 

  Stepwise topochemical fluorination of SrCrO₃ perovskite via a super-structured oxide

  YuY. Su, YoshihiroY. Tsujimoto, KotaroK. Fujii, YujiY. Masubuchi, HirohitoH. Ohata, HideoH. Iwai, MasatomoM. Yashima, KazunariK. Yamaura

  Chem. Comm., 55, 50, 7239-7242, 2019

  Grant/Award: JP16H06538, JPH06439, JPH06440, 19H04711, 17H05493, 17K14466 and 16H04501, SP8 2017B4502, 2018A4501 and 2018A4501

• 

  Direct evidence for two-dimensional oxide-ion diffusion in the hexagonal perovskite-related oxide Ba₃MoNbO_8.5–δ

  MasatomoM. Yashima, TakafumiT. Tsujiguchi, KotaroK. Fujii, EikiE. Niwa, ShuntaS. Nishioka, James R.J. Hester, KazuhikoK. Maeda

  J. Mater. Chem. A, 7, 23, 13910-13916, 2019

  Grant/Award: JP15H02291, JP16H00884, JP16H06293, JP16H06440, JP16H06441, JP16H06438, JP16K21724, JP17K17717, JP17H06222, and JP19H00821, ANSTO: proposal No. PPR6342, PP5198, and PPR5618; J-PARC: proposal No. 2017L1300 and 2017L1302, SR 2014G508, 2015G047, 2016G644, 2017G168, and 2018G543, SOIFIT

• 

  Synthesis of Ba1-xSrxYSi2O5N and Discussion based on Structure Analysis and DFT Calculation

  TakuyaT. Yasunaga, MakotoM. Kobayashi, KentaK. Hongo, KotaroK. Fujii, ShunsukeS. Yamamoto, RyoR. Maezono, MasatomoM. Yashima, MasayaM. Mitsuishi, HidekiH. Kato, MasatoM. Kakihana

  J. Solid State Chem., 276, , 266-271, 2019

  Grant/Award: xxx

• 

  Thermal expansion and P-V-T equation of state of cubic silicon nitride

  NorimasaN. Nishiyama, KotaroK. Fujii, EleonoraE. Kulik, MasahiroM. Shiraiwa, Nico AN. Gaida, YujiY. Higo, YoshinoriY. Tange, AstridA. Holzheid, MasatomoM. Yashima, FumihiroF. Wakai

  J. Eur. Ceram. Soc.,39, 13, 3627-3633, 2019

  Grant/Award: xxx

• 

  Synthesis of a Layered Niobium Oxynitride Rb₂NdNb₂O₆N·H₂O Showing Visible-Light Photocatalytic Activity for H₂ Evolution

  HarukiH. Wakayama, KeisukeK. Hibino, KotaroK. Fujii, TakayoshiT. Oshima, KeiichiK. Yanagisawa, YuugaY. Kobayashi, KojiK. Kimoto, MasatomoM. Yashima, KazuhikoK. Maeda

  Inorg. Chem., 58, 9, 6161-6166, 2019

  Grant/Award: xxx

• 

  Crystal structure analysis and evidence of mixed anion coordination at Ce3+ site in Y3 Al2(Al, Si)3(O,N)12 oxynitride garnet phosphor

  KazukiK. Asami, MasahiroM. Shiraiwa, JumpeiJ. Ueda, KotaroK. Fujii, MasatomoM. Yashima, KentaK. Hongo, RyoR. Maezono, Mikhail G.M. Brik, SetsuhisaS. Tanabe

  J. Mater. Chem. C, 7, 5, 1330-1336, 2019

  Grant/Award: JP16H06438, JP16H06439, 16H06440, and 16H06441, MLF 2017A0023 and 2017A0064,

• 

  Crystal structures of Ca⁴⁺_xY_3–xSi₇O_15+xN_5–x (0 ≤ x ≤ 1) comprising of an isolated [Si₇(O,N)₁₉] unit

  MakotoM. Kobayashi, TakuyaT. Yasunaga, HidekiH. Kato, KotaroK. Fujii, MasatomoM. Yashima, MasatoM. Kakihana

  Acta Cryst. E, 75, , 260-263, 2019

  Grant/Award: xxx

• 

  Redshift and thermal quenching of Ce³⁺ emission in (Gd,Y)₃(Al, Si)₅(O, N)₁₂ oxynitride garnet phosphors

  KazukiK. Asami, JumpeiJ. Ueda, MasahiroM. Shiraiwa, KotaroK. Fujii, MasatomoM. Yashima, SetsuhisaS. Tanabe

  Opt. Mater., 87, , 117-121, 2019

  Grant/Award: xxx

• 

  Preparation and photocatalytic activity of Mo-modified Ti-doped HAp

  NoppakhateN. Jiraborvornpongsa, ToshihiroT. Isobe, SachikoS. Matsushita, MitsutakeM. Oshikiri, MasatoM. Wakamura, KotaroK. Fujii, MasatomoM. Yashima, AkiraA. Nakajima

  Appl. Catal. B, 243, , 448-454, 2019

  Grant/Award: xxx

2018

• 

  A Novel Near Ultraviolet-Visible Light Excitable Phosphor Based on O^2–-Ce⁴⁺ Charge Transfer

  DaweiD. Wen, HidekiH. Kato, MakotoM. Kobayashi, ShunsukeS. Yamamoto, MasayaM. Mitsuishi, KotaroK. Fujii, MasatomoM. Yashima, MasatoM. Kakihana

  Inorg. Chem., 57, 23, 14524-14531, 2018

  Grant/Award: JP16H02391 and “Mixed anion” Grant Numbers JP16H06438, JP16H06439, and JP16H06440

• 

  Discovery and development of BaNdInO₄ —A brief review—

  KotaroK. Fujii, MasatomoM. Yashima

  J. Ceram. Soc. Jpn., 126, 10, 852-859, 2018

  Grant/Award: JP24850009, JP24226016,JP24246107,JP25630365,JP15H02291, JP26870190,JP16H00884,JP16H06293,JP16H06440, JP16H06438,JP16K21724,JP17H06222, MLF 2012B0217,2013A0136,2013B0100, 2013B0178,2013B0198,2014A0011,2014B0114, 2014B0233,2014AM0011,2015A0146,2015A0190, 2015A0249,2016A0175,2017A0053,2017A0111, 2017L1300, ANSTO P2696,DB2638, MI2673,P3209,P3648,P4008,P4501,P4682,P4943, PP5198, SR 2011G185,2013G216, 2013G053,2014G508,2015G047,2016G644,2017G168

• 

  Pr/Ba cation-disordered perovskite Pr_2/3Ba_1/3CoO_3-δ as a new bifunctional electrocatalyst for oxygen reduction and oxygen evolution reactions

  WenruiW. Zhang, MasahiroM. Shiraiwa, NannanN. Wang, TingliT. Ma, KotaroK. Fujii, EikiE. Niwa, MasatomoM. Yashima

  J. Ceram. Soc. Jpn., 126, 10,814-819, 2018

  Grant/Award: 15H02291,16H00884,16H06293,16H06440,16H06438, 17K17717,17H06222, MLF 2017A0023, 2017A0064and2017B0143

• 

  Function of Tetrahedral ZnS3O Building Blocks in the Formation of SrZn2S2O: A Phase Matchable Polar Oxysulfide with a Large Second Harmonic Generation Response

  YoshihiroY. Tsujimoto, ChristianC. Juillerat, WeiguoW. Zhang, KotaroK. Fujii, MasatomoM. Yashima, P. ShvP. Halasyaman, Hans-Conrad zurH. Loye

  Chem. Mater, 30, 18, 6486-6493, 2018

  Grant/Award: 16H06438, 16H06439, 16H06440, 17H05493, 17K14466

• 

  Chemical Pressure-Induced Anion Order–Disorder Transition in LnHO Enabled by Hydride Size Flexibility

  HirokiH. Yamashita, ThibaultT. Broux, YojiY. Kobayashi, FumitakaF. Takeiri, TongT. Zhu, Michael A.M. Hayward, Kotaro, Fujii, MasatomoM. Yashima, KazukiK. Shitara, AkihideA. Kuwabara, TaitoT. Murakami, HiroshiH. Kageyama

  J. Am. Chem. Soc., 140, 36, 11170-11173, 2018

  Grant/Award: JP17H06439, JP17H06440, JP16H06441, and JP15H03849, MLF 2017A0064, 2017A0023, 2017L1300

• 

  Structural Change in SrSiO₃ Induced by Introduction of Nitrogen

  MakotoM. Kobayashi, JihaeJ. Kim, HironoriH. Sato, TakuyaT. Yasunaga, HidekiH. Kato, KotaroFujii, MasahiroM. Shiraiwa, MasatomoM. Yashima, MasatoM. Kakihana

  Chem. Lett., 47, 10, 1327-1329, 2018

  Grant/Award: xxx

• 

  A Systematic Evaluation of the Role of the Lanthanide Elements in Complex Functional Oxides; Implications for Energy Conversion Devices

  JiJ. Wu, KotaroK. Fujii, MasatomoM. Yashima, AleksandarA. Staykov, TanerT. Akbay, TatsumiT. Ishihara, John A.J. Kilner

  J. Mater. Chem. A, 6, 25, 11819-11829, 2018

  Grant/Award: xxx

• 

  Undoped Layered Perovskite Oxynitride Li₂LaTa₂O₆N for Photocata-lytic CO₂ Reduction with Visible Light

  TakayoshiT. Oshima, TomT. Ichibha, Ken SinkouK. Qin, KanemichiK. Muraoka, Junie Jhon M.J. Vequizo, KeisukeK. Hibino, RyoR. Kuriki, ShunsukeS. Yamashita, KentaK. Hongo, TomokiT. Uchiyama, KotaroK. Fujii, DalingD. Lu, RyoR. Maezono, AkiraA. Yamakata, HidekiH. Kato, KojiK. Kimoto, MasatomoM. Yashi-ma, YoshiharuY. Uchimoto, MasatoM. Kakihana, OsamuO. Ishitani, HiroshiH. Kageyama, KazuhikoK. Maeda

  Angew. Chem. Int. Ed., 57, 27, 8154-8158, 2018

  Grant/Award: JP16H06438, JP16H06439, JP16H06440, JP16H06441, JP17H05491, JP16K21724 and JP17H05478,

• 

  A new structure family of oxide-ion conductor Ca_0.8Y_2.4Sn_0.8O₆ discovered by a combined technique of the bond-valence method and experiments

  RyotaR. Inoue, KotaroK. Fujii, MasahiroM. Shiraiwa, EikiE. Niwa, MasatomoM. Yashima

  Dalton Trans., 47, 22, 7515-7521, 2018

  Grant/Award: JP15H02291, JP26870190, JP16H00884, JP16H06293, JP16H06440, JP16H06438, JP16K21724, JP17K17717, JP17H06222, PF 2014G508, 2015G047, 2016G644, 2017G168, SOIFIT

• 

  High oxide-ion conductivity by the overbonded channel oxygens in Si-deficient La_9.565(Si_5.826□_0.174)O₂₆ apatite without interstitial oxygens

  KotaroK. Fujii, MasatomoM. Yashima, KeisukeK. Hibino, MasahiroM. Shiraiwa, KoichiroK. Fukuda, SusumuS. Nakayama, NobuoN. Ishizawa, TakayasuT. Hanashima, TakashiT. Ohhara

  J. Mater. Chem. A, 6, 23, 10835-10846, 2018

  Grant/Award: JP21560730, JP15K06495, JP17H06222, JP15H02291, JP26870190, JP16H00884, JP16H06293, JP16H06440, and JP16H06438, MLF 2013B0100, 2015A0146, 2017A0053, 2017L1303, SOIFIT

• 

  Experimental visualization of oxide-ion diffusion paths in pyrochlore-type Yb₂Ti₂O₇

  WataruW. Uno, KotaroK. Fujii, EikiE. Niwa, ShukiS. Torii, PingP. Miao, TakashiT. Kamiyama, MasatomoM. Yashima

  J. Ceram. Soc. Jpn., 126, 5, 341-345, 2018

  Grant/Award: JP15H02291,JP25630365,JP26870190,JP16H00884, JP16H06293,JP16H06440,JP16H06438,JP16H06438, JP17H06222, MLF 2013B0198,2014B0233,2015A0190,2016A0175, 2017A0111,2017L1300

• 

  Crystal structure and electrical conductivity of BaR₂ZnO₅ (R = Sm, Gd, Dy, Ho, and Er) – A new structure family of oxide-ion conductors

  KeigoK. Nakamura, KotaroK. Fujii, EikiE. Niwa, MasatomoM. Yashima

  J. Ceram. Soc. Jpn., 126, 5, 292-299, 2018

  Grant/Award: JP15H02291,JP26870190,JP16H00884, JP16H06293,JP16H06440,JP16H06438,JP16K21724, JP17K17717,JP17H06222, MLF 2015A0249, BL19B2(2015B1596)andBL02B2(2016B1616)

• 

  Synthesis, Crystal Structure and Optical Properties of New Layered Perovskite Scandium Oxychlorides: Sr₂ScO₃Cl, Sr₃Sc₂O₅Cl₂, and Ba₃Sc₂O₅Cl₂

  YuY. Su, YoshihiroY. Tsujimoto, KotaroK. Fujii, MakotoM. Tatsuta, KengoK. Oka, MasatomoM. Yashima, HirakuH. Ogino, KazunariK. Yamaura

  Inorg. Chem., 57, 9, 5615-5623, 2018

  Grant/Award: 2016B4504, 2017A4503, MLF 2017A0023

• 

  A New Precursor Route Using a Compositionally Flexible Layered Oxide and Nanosheet for Improved Nitrogen Doping and Photocatalytic Activity

  KazuhikoK. Maeda, YukiY. Tokunaga, KeisukeK. Hibino, KotaroK. Fujii, MiharuM. Eguchi, ShintaroS. Ida, MasatomoM. Yashima

  ACS Appl. Energy Mater., 1, 4, 1734-1741, 2018

  Grant/Award: JP16H06440, JP16H06441, JP17H05484,

• 

  High pressure synthesis of hydride-fluoride pyrochlore NaCaMg₂F_7–xH_x

  KazunariK. Arai, YojiY. Kobayashi, YaY. Tang, YusukeY. Tsutsui, DaisukeD. Sakamaki, TakafumiT. Yamamoto, KotaroK. Fujii, MasatomoM. Yashima, ShuS. Seki, HiroshiH. Kageyama

  Chem. Lett., 47, 7, 829-832, 2018

  Grant/Award: JP16H06438, JP16H06439, JP16H06440, MLF 2017A0064, SP8 2017A1118

• 

  Single crystal growth of Sillén–Aurivillius perovskite oxyhalides Bi₄NbO₈X (X = Cl, Br)

  ChengchaoC. Zhong, FumitakaF. Takeiri, DaichiD. Kato, KotaroK. Fujii, MasatomoM. Yashima, YasuhiroY. Fujii, AkitoshiA. Koreeda, CédricC. Tassel, RyuR. Abe, HiroshiH. Kageyama

  Inorganics, 6, 2, 41, 2018

  Grant/Award: xxx

• 

  A Quasi-two-dimensional metallic behavior in BaVO_3–xH_x (0.3 ≤ x ≤ 0.9) with Face- and Corner-sharing Octahedra

  TakafumiT. Yamamoto, KazukiK. Shitara, ShunsakuS. Kitagawa, AkihideA. Kuwabara, MasahiroM. Kuroe, KenjiK. Ishida, MasayukiM. Ochi, KazuhikoK. Kuroki, KotaroK. Fujii, MasatomoM. Yashima, Craig M.C. Brown, HiroshiH. Takatsu, TasselT. Cedric, HiroshiH. Kageyama

  Chem. Mater, 30, 5, 1566-1574, 2018

  Grant/Award: JP16H06438, JP16H06439, JP16H06440, JP16H06033, 16K21724, and JP17H05481, MLF 2014B0114 and 2015A0249, SP8 2014B1360 and 2015B1111

2017

• 

  Weak ferromagnetic ordering in brownmillerite Ca₂Fe₂O₅ and its effect on electric field gradients

  IsaoI. Kagomiya, YukiY. Hirota, Ken-ichiK. Kakimoto, KotaroK. Fujii, MasahiroM. Shiraiwa, MasatomoM. Yashima, AkioA. Fuwa, ShinS. Nakamura

  Phys. Chem. Chem. Phys., 19, 46, 31194-31201, 2017

  Grant/Award: xxx

• 

  Crystal Structure, Electron Density and Characterization of Visible-Light Responsive Photocatalysts, (BaTaO₂N)_1−x(SrWO₂N)_x Solid Solutions

  KeisukeK. Hibino, MasatomoM. Yashima, TakayoshiT. Oshima, KotaroK. Fujii, KazuhikoK. Maeda

  Dalton Trans., 46, 43, 14947-14956, 2017

  Grant/Award: xxx

• 

  Crystal Structure and Oxide-Ion Conductivity of Ba_1+xNd_1−xInO_4−x/2

  MasahiroM. Shiraiwa, KotaroK. Fujii, YuichiY. Esaki, Su JaeS. Kim, SeongsuS. Lee, MasatomoM. Yashima

  J. Electrochem. Soc., 164, 13, F1392-F1399, 2017

  Grant/Award: xxx

• 

  Crystal-structure and electron-density analyses of the perovskite-type oxynitrides BaNbO₂N and SrNbO₂N through synchrotron X-ray powder diffraction

  KotaroK. Fujii, KazuhoK. Shimada, MasatomoM. Yashima

  J. Ceram. Soc. Jpn., 125, 11, 808-810, 2017

  Grant/Award: xxx

• 

  New Oxide-Ion Conductor SrYbInO₄ with Partially Cation-Disordered CaFe₂O₄-Type Structure

  AyakaA. Fujimoto, MasatomoM. Yashima, KotaroK. Fujii, James R.J. Hester

  J. Phys. Chem. C, 121, 39, 21272-21280, 2017

  Grant/Award: xxx

• 

  Synthesis, Structure and Photoluminescence of a Novel Oxynitride BaYSi₂O₅N Activated by Eu²⁺ and Ce³⁺

  MakotoM. Kobayashi, TakuyaT. Yasunaga, HironoriH. Sato, HidekiH. Kato, KotaroK. Fujii, MasatomoM. Yashima, MasatoM. Kakihana

  Chemistry Letters, 46, 6, 795-797, 2017

  Grant/Award: xxx

• Control of the reversibility during boronic ester formation: application to the construction of ferrocene dimers and trimers

  KosukeK. Ono, YoheiY. Tohyama, TatsuhiroT. Uchikura, YujiY. Kikuchi, KotaroK. Fujii, Hidehiro Uekusa and NobuharuH. Iwasawa

  Dalton Trans., 46, 7, 2370-2376, 2017

2016

• 

  Hydrothermal Synthesis, Crystal Structure, and Superconductivity of a Double-Perovskite Bi Oxide

  Mirza H. K.M. Rubel, TakahiroT. Takei, NobuhiroN. Kumada, M. MozaharM. Ali, AkiraA. Miura, KiyoharuK. Tadanaga, KengoK. Oka, MasakiM. Azuma, MasatomoM. Yashima, KotaroK. Fujii, EisukeE. Magome, ChikakoC. Moriyoshi, YoshihiroY. Kuroiwa, James R.J. Hester, and Maxima. Avdeev

  Chem. Mater., 28, 2, 459–465, 2016

  Grant/Award: xxx

2015

• 

  Improved oxide-ion conductivity of NdBaInO₄ by Sr doping

  KotaroK. Fujii, MasahiroM. Shiraiwa, YuichiY. Esaki, MasatomoM. Yashima, Su JaeS. Kim, SeongsuS. Lee

  J. Mater. Chem. A, 3, 22, 11985-11990, 2015

  Grant/Award: xxx

• 

  Structural Origin of the Anisotropic and Isotropic Thermal Expansion of K₂NiF₄-Type LaSrAlO₄ and Sr₂TiO₄

  KeishiK. Kawamura, MasatomoM. Yashima, KotaroK. Fujii, KazukiK. Omoto, KeisukeK. Hibino, ShuntaroS. Yamada, James R.J. Hester, MaximM. Avdeev, PingP. Miao, ShukiS. Torii, TakashiT. Kamiyama

  Inorg. Chem., 54, 8, 3896-3904, 2015

  Grant/Award: xxx

• Structure Determination from Powder X-ray Diffraction Data of Black Azo (Hydrazone) Pigments

  JunjiJ. Otani, MichioM. Matsumura, KotaroK. Fujii, HidehiroH. Uekusa

  Chem. Lett., 44, 5, 662-664, 2015

2014

• 

  Defect induced sodium disorder and ionic conduction mechanism in Na_1.82Mg_1.09P₂O₇

  GuandongG. Liu, Shin-ichiS. Nishimura, Sai CheongS. Chung, KotaroK. Fujii, MasatomoM. Yashima, AtsuoA. Yamada

  J. Mat. Chem. A, 2, 43, 18353-18359, 2014

  Grant/Award: xxx

• 

  New Perovskite-Related Structure Family of Oxide-Ion Conducting Materials NdBaInO₄

  KotaroK. Fujii, YuichiY. Esaki, KazukiK. Omoto, MasatomoM. Yashima, AkinoriA. Hoshikawa, ToruT. Ishigaki, James R.J. Hester

  Chem. Mater., 26, 8, 2488-2491, 2014

  Grant/Award: xxx

• 

  Diffusion Path and Conduction Mechanism of Protons in Hydroxyapatite

  MasatomoM. Yashima, NaoyukiN. Kubo, KazukiK. Omoto, HirotakaH. Fujimori, KotaroK. Fujii, KenjiK. Ohoyama

  J. Phys. Chem. C, 118, 10, 5180-5187, 2014

  Grant/Award: xxx

• Almost Perfect Frustration in the Dimer Magnet Ba₂CoSi₂O₆Cl₂

  HidekazuH. Tanaka, NobuyukiN. Kurita, MakikoM. Okada, EijiE. Kunihiro, YutakaY. Shirata, KotaroK. Fujii, HidehiroH. Uekusa, AkiraA. Matsuo, KoichiK. Kindo, HiroyukiH. Nojiri

  J. Phys. Soc. Jpn., 83, 10, 103701/1-5, 2014

2013

• Polymorphic and pseudomorphic transformation behavior of acyclovir based on thermodynamics and crystallography

  KatsuhideK. Terada, HiroyukiH. Kurobe, MasatakaM. Ito, YasuoY. Yoshihashi, EtsuoE. Yonemochi, KotarouK. Fujii, HidehiroH. Uekusa

  J. Therm. Anal. Calorim., 113, 3, 1261-1267, 2013

  Grant/Award: xxx

• Structural understanding of solid-state photodimerization reactions of cinnamic amide derivatives in terms of reaction cavities - color developer for thermosensitive paper

  SatoshiS. Kodama, KoheiK. Johmoto, AkikoA. Sekine, KotaroK. Fujii, HidehiroH. Uekusa

  CrystEngComm, 15, 23, 4667-4675, 2013

  Grant/Award: xxx

• 

  Experimental visualization of the Bi–O covalency in ferroelectric bismuth ferrite (BiFeO₃) by synchrotron X-ray powder diffraction analysis

  KotaroK. Fujii, HirokiH. Kato, KazukiK. Omoto, MasatomoM. Yashima, JunJ. Chen, XianranX. Xing

  Phys. Chem. Chem. Phys., 15, 18, 6779-6782, 2013

  Grant/Award: xxx

• Solid-State Hydration/Dehydration of Erythromycin A Investigated by ab Initio Powder X-ray Diffraction Analysis: Stoichiometric and Nonstoichiometric Dehydrated Hydrate

  KotaroK. Fujii, MasahideM. Aoki, HidehiroH. Uekusa

  Cryst. Growth Des., 13, 5, 2060-2066, 2013

  Grant/Award: xxx

• Reversible Solid State Redox of an Octacyanometallate-Bridged Coordination Polymer by Electrochemical Ion Insertion/Extraction

  MasashiM. Okubo, KoichiK. Kagesawa, YoshifumiY. Mizuno, DaisukeD. Asakura, EijiE. Hosono, TetsuichiT. Kudo, HaoshenH. Zhou, KotaroK. Fujii, HidehiroH. Uekusa, Shin-ichiS. Nishimura, AtsuoA. Yamada, AtsushiA. Okazawa, NorimichiN. Kojima

  Inorg. Chem., 52, 7, 3772-3779, 2013

  Grant/Award: xxx

2012

• Mechanism of Dehydration-Hydration Processes of Lisinopril Dihydrate Investigated by ab Initio Powder X-ray Diffraction Analysis

  KotaroK. Fujii, HidehiroH. Uekusa, NaokoN. Itoda, EtsuoE. Yonemochi, KatsuhideK. Terada

  Cryst. Growth Des., 12, 12, 6165-6172, 2012

• Guest-induced self-assembly of a macrocyclic boronic ester containing diarylethene units: enhancement of photoresponsivity

  NobuharuN. Iwasawa, HirokiH. Takahagi, KosukeK. Ono, KotaroK. Fujii, HidehiroH. Uekusa

  Chem. Comm., 48, 60, 7477-7479, 2012

• Cocrystallization and amorphization induced by drug-excipient interaction improves the physical properties of acyclovir

  TakaakiT. Masuda, YasuoY. Yoshihashi, EtsuoE. Yonemochi, KotaroK. Fujii, HidehiroH. Uekusa, KatsuhideK. Terada

  Int. J. Pharm., 422, 1-2, 160-169, 2012

2011

• Structure Determination from Powder X-ray Diffraction Data of a New Polymorph of a High-Density Organic Hydrate Material, with an Assessment of Hydrogen-Bond Disorder by Rietveld Refinement

  Gin KeatG. Lim, KotaroK. Fujii, Kenneth D. MK. Harris, David C.D. Apperley

  Cryst. Growth Des., 11, 12, 5192-5199, 2011

• Reversible Color Switching of an Organic Crystal Induced by Organic Solvent Vapors

  KotaroK. Fujii, AyaA. Sakon, AkikoA. Sekine, HidehiroH. Uekusa

  Cryst. Growth Des., 11, 10, 4305-4308, 2011

• Supramolecular Networks in Crystalline Inclusion Complexes Formed from a New Host: 2,2-Bis(4-hydroxy-3-phenylphenyl)-1Hindene-1,3(2H)-dione

  KentaK. Kasugai, SuzumiS. Hashimoto, KazunoriK. Imai, AyaA. Sakon, KotaroK. Fujii, HidehiroH. Uekusa, NaotoN. Hayashi, KeijiK. Kobayashi

  Cryst. Growth Des., 11, 9, 4044-4052, 2011

• Cooperativity in Solid-State Squaramides

  RafelR. Prohens, AnnaA. Portell, CristinaC. Puigjaner, SalvadorS. Tomas, KotaroK. Fujii, Kenneth D. M.K. Harris, XavierX. Alcobe, MerceM. Font-Bardia, RafaelR. Barbas

  Cryst. Growth Des., 11, 9, 3725-3730, 2011

• Structural Chemistry of a New Chiral Anhydrous Phase of Ru(bipy)₃(ClO₄)₂ Established from Powder X-ray Diffraction Analysis

  Eugene Y.E. Cheung, KotaroK. Fujii, FangF. Guo, Kenneth D. M.K. Harris, SayokoS. Hasebe, ReikoR. Kuroda

  Cryst. Growth Des., 11, 8, 3313-3317, 2011

• Potential of synchrotron X-ray powder diffractometry for detection and quantification of small amounts of crystalline drug substances in pharmaceutical tablets

  HiroyukiH. Yamada, KatsuhikoK. Masuda, TakayukiT. Ishige, KotaroK. Fujii, HidehiroH. Uekusa, KeikoK. Miura, EtsuoE. Yonemochi, KatsuhideK. Terada

  J. Pharm. Biomed. Anal., 56, 2, 448-453, 2011

• Exploiting powder X-ray diffraction for direct structure determination in structural biology: The P2X4 receptor trafficking motif YEQGL

  KotaroK. Fujii, Mark T.M. Young, Kenneth D.M.K. Harris

  J. Struct. Biol., 174, 3, 461-467, 2011

• Metastable polymorphic form of isopropylbenzophenone derivative directly obtained by the solid-state photoreaction investigated by ab initio powder X-ray diffraction analysis

  KotaroK. Fujii, HidehiroH. Uekusa, MichitaroM. Fukano, HidekoH. Koshima

  CrystEngComm, 13, 9, 3197-3201, 2011

• In situ observation and mechanistic elucidation of metastable colored species in crystalline state photochromism of trans-biindenylidenedione

  KotaroK. Fujii, KumikoK. Aruga, AkikoA. Sekine, HidehiroH. Uekusa, KatsuyaK. Sohno, KoichiK. Tanaka

  CrystEngComm, 13, 3, 731-733, 2011

• Study of the Pseudo-Crystalline Transformation from Form I to Form II of Thiamine Hydrochloride (Vitamin B1)

  KatsuhikoK. Masuda, TakayukiT. Ishige, HiroyukiH. Yamada, KotaroK. Fujii, HidehiroH. Uekusa, KeikoK. Miura, EtsuoE. Yonemochi, KatsuhideK. Terada

  Chem. Pharm. Bull., 59, 1, 57-62, 2011

2010

• Cocrystalline Phase Transformation of Binary Mixture of Trimethoprim and Sulfamethoxazole by Slurry Technique

  ErizalE. Zaini, Yeyet C.Y. Sumirtapura, Sundani N.S. Soewandhi, AuzalA. Halim, HidehiroH. Uekusa, KotaroK. Fujii

  Asian J. Pharm. Clin. Res., 3, 4, 26-29, 2010

• Direct structure elucidation by powder X-ray diffraction of a metal-organic framework material prepared by solvent-free grinding

  KotaroK. Fujii, Ana LazuenA. Garay, JaneenJ. Hill, ElenaE. Sbircea, ZhigangZ. Pan, MingcanM. Xu, David C.D. Apperley, Stuart L.S. James, Kenneth D. M.K. Harris

  Chem. Comm., 46, 40, 7572-7574, 2010

• Potassium clavulanate

  KotaroK. Fujii, KazuyukiK. Toyota, AkikoA. Sekine, HidehiroH. Uekusa, IlmaI. Nugrahani, SukmadjajaS. Asyarie, N. SundaniN. Soewandhi, SlametS. Ibrahim

  Acta Crystallogr. Sect. E Struct. Reports Online, 66, , m985-m986, 2010

• Arrays of P=O Dipoles As a Recurrent Structural Motif in Bis-Diphenylphosphine Oxides, Established from Powder X-ray Diffraction

  Gin KeatG. Lim, ZhongfuZ. Zhou, KotaroK. Fujii, PatriziaP. Calcagno, EmilioE. Tedesco, Simon J.S. Kitchin, Benson M.B. Kariuki, DouglasD. Philp, Kenneth D. MK. Harris

  Cryst. Growth Des., 10, 8, 3814-3818, 2010

• A Solid-State Dehydration Process in an Organic Material Associated with Substantial Hydrogen-Bond Reorganization, Investigated by Powder X-ray Diffraction

  JavierJ. Marti-Rujas, AnabelA. Morte-Rodenas, FangF. Guo, NigelN. Thomas, KotaroK. Fujii, Benson M.B. Kariuki, Kenneth D. MK. Harris

  Cryst. Growth Des., 10, 7, 3176-3181, 2010

• Selective transformation pathways between crystalline forms of an organic material established from powder X-ray diffraction analysis

  KotaroK. Fujii, YasunariY. Ashida, HidehiroH. Uekusa, FangF. Guo, Kenneth D. M.K. Harris

  Chem. Comm., 46, 24, 4264-4266, 2010

• Hexaradialenes by Successive Ring Openings of Tris(alkoxytricyclobutabenzenes):Synthesis and Characterization

  ShinyaS. Shinozaki, ToshiyukiT. Hamura, YousukeY. Ibusuki, KotaroK. Fujii, HidehiroH. Uekusa, KeisukeK. Suzuki

  Angew. Chem. Int. Ed., 49, 17, 3026-3029, 2010

• Physicochemical Understanding of Polymorphism and Solid-State Dehydration/Rehydration Processes for the Pharmaceutical Material Acrinol, by Ab Initio Powder X-ray Diffraction Analysis and Other Techniques

  KotaroK. Fujii, HidehiroH. Uekusa, NaokoN. Itoda, GenG. Hasegawa, EtsuoE. Yonemochi, KatsuhideK. Terada, ZhigangZ. Pan, Kenneth D. M.K. Harris

  J. Phys. Chem. C, 114, 1, 580-586, 2010

2009

• Partial ferromagnetic ordering and indirect exchange interaction in the spatially anisotropic kagome antiferromagnet Cs₂Cu₃CeF₁₂

  T.T. Amemiya, M.M. Yano, K.K. Morita, I.I. Umegaki, T.T. Ono, H.H. Tanaka, K.K. Fujii, HH. Uekusa

  Phys. Rev. B: Condens. Matter, 80, 10, 100406/1-100406/4, 2009

• Magnetic susceptibilities in a family of S= 1/2 kagome antiferromagnets

  T.T. Ono, K.K. Morita, M.M. Yano, H.H. Tanaka, K.K. Fujii, H.H. Uekusa, Y.Y. Narumi, and K.a. Kindo

  Phys. Rev. B: Condens. Matter, 79, 17, 174407/1-11, 2009

• Dihydrochalcone Designed from Methylophiopogonanone B Strongly Inhibits Hypoxia-inducible Factor (HIF)-1α Activity

  MikioM. Fujii, KiyoshiK. Egawa, YasuakiY. Hirai, MasatoM. Kondo, KotaroK. Fujii, HidehiroH. Uekusa, HiroyukiH. Akita, KiyoshiK. Nose, KazuoK. Toriizuka, YoshiteruY. Ida

  Heterocycles, 78, 8, 2061 - 2065, 2009

• Chiral Tetraazamacrocycles Having Four Pendant-Arms

  SeijiS. Kamioka, TakashiT. Takahashi, SusumuS. Kawauchi, HiroakiH. Adachi, YusukeY. Mori, KotaroK. Fujii, HidehiroH. Uekusa, TakayukiT. Doi

  Org. Lett., 11, 11, 2289-2292, 2009

• Performance of the micro-PIC gaseous area detector in small-angle X-ray scattering experiments

  KaoriK. Hattori, Ken-ichiK. Tsuchiya, KazukiK. Ito, YokoY. Okada, KotaroK. Fujii, HidetoshiH. Kubo, KentaroK. Miuchi, MasakiM. Takata, ToruT. Tanimori, HidehiroH. Uekusa

  J. Synchrotron Radiat., 16, 2, 231-236, 2009

• Vapour Induced Crystalline Transformation Investigated by ab initio Powder X-ray Diffraction Analysis

  KotaroK. Fujii, YasunariY. Ashida, HidehiroH. Uekusa, ShinyaS. Hirano, ShinjiS. Toyota, FumioF. Toda, ZhigangZ. Pan, Kenneth D.M.K. Harris

  Cryst. Growth Des., 9, 2, 1201-1207, 2009

• Reevaluation of solubility of tolbutamide and polymorphic transformation from Form I to unknown crystal form

  GenG. Hasegawa, TakaoT. Komasaka, RuiR. Bando, YasuoY. Yoshihashi, EtsuoE. Yonemochi, KotaroK. Fujii, HidehiroH. Uekusa, KatsuhideK. Terada

  Int. J. Pharm., 369, 1-2, 12-18, 2009

2008

• Single-crystal-to-single-crystal photocyclization of 4-(2,4,6-triisopropylbenzoyl)benzoic acid in the salt crystal with (S)-phenylethylamine

  HidekoH. Koshima, YuyaY. Ide, MichitaroM. Fukano, KotaroK. Fujii, HidehiroH. Uekusa

  Tetrahedron Lett., 49, 28, 4346-4348, 2008

• Singlet Ground State and Spin Gap in S = 1/2 Kagome Antiferromagnet Rb₂Cu₃SnF₁₂

  KatsuhiroK. Morita, MidoriM. Yano, ToshioT. Ono, HidekazuH. Tanaka, KotaroK. Fujii, HidehiroH. Uekusa, YasuoY. Narumi, and Koichia. Kindo

  J. Phys. Soc. Jpn., 77, 4, 04370/1-4, 2008

• Solid-State Phase Transition of an Inclusion Complex of 5-Methyl-2-pyridone with 1,3,5-Benzenetricarboxylic Acid

  ShinyaS. Hirano, ShinjiS. Toyota, FumioF. Toda, KotaroK. Fujii, HidehiroH. Uekusa

  Angew. Chem. Int. Ed., 45, 36, 6013-6016, 2006

• Multiple Pentafluorophenylation of 2,2,3,3,5,6,6-Heptafluoro-3,6-dihydro-2H-1,4-oxazine with an Organosilicon Reagent: NMR and DFT Structural Analysis of Oligo(perfluoroaryl) Compounds

  MasakazuM. Nishida, HaruhikoH. Fukaya, YoshioY. Hayakawa, TaizoT. Ono, KotaroK. Fujii, HidehiroH. Uekusa

  Helv. Chim. Acta, 89, 11, 2671-2685, 2006