Publications
Ge-Containing Oxide-Ion Conductors with CaEu2Ge3O10-Type Structure Discovered by the Bond-Valence Method and Experiments
Masahiro Matsui, Kotaro Fujii, Masahiro Shiraiwa, Masatomo Yashima
Inorg. Chem., in press.https://doi.org/10.1021/acs.inorgchem.2c01662
Different Local Structures of Mo and Nb Polyhedra in the Oxide-Ion-Conducting Hexagonal Perovskite-Related Oxide Ba3MoNbO8.5 Revealed by 95Mo and 93Nb NMR Measurements
Masataka Tansho, Atsushi Goto, Shinobu Ohki, Yuuki Mogami, Yuichi Sakuda, Yuta Yasui, Taito Murakami, Kotaro Fujii, Takahiro Iijima, Masatomo Yashima
J. Phys. Chem. C, in press.https://doi.org/10.1021/acs.jpcc.2c03429
Simultaneous Reduction of Proton Conductivity and Enhancement of Oxide-Ion Conductivity by Aliovalent Doping in Ba7Nb4MoO20
Yuki Suzuki, Taito Murakami, Kotaro Fujii, James R. Hester, Yuta Yasui, Masatomo Yashima
Inorg. Chem., 2022, 61(19), 7537-7545.https://doi.org/10.1021/acs.inorgchem.2c00671
Synthesis of Hydride-Doped Perovskite Stannate with Visible Light Absorption Capability
Masashi Nakamura, Hirofumi Akamatsu, Kotaro Fujii, Yusuke Nambu, Yoichi Ikeda, Tomoki Kanazawa, Shunsuke Nozawa, Masatomo Yashima, Katsuro Hayashi, Kazuhiko Maeda
Inorg. Chem., 2022, 61(17), 6584-6593.https://doi.org/10.1021/acs.inorgchem.2c00398
First-Principles Analysis of the Oxide-Ion Conduction Mechanism in Si-Deficient Lanthanum Silicate Apatite
Yusuke Ogura, Tatsuya Yokoi, Kotaro Fujii, Masatomo Yashima, Katsuyuki Matsunaga
J. Phys. Chem. C, 2022, 126(13), 5805-5812.https://doi.org/10.1021/acs.jpcc.1c10486
High Oxide‐Ion Conductivity in a Hexagonal Perovskite‐Related Oxide Ba7Ta3.7Mo1.3O20.15 with Cation Site Preference and Interstitial Oxide Ions
Taito Murakami, Toshiya Shibata, Yuta Yasui, Kotaro Fujii, James R. Hester, Masatomo Yashima
Small, 2022, 18, 2106785.https://doi.org/10.1002/smll.202106785
Ruddlesden–Popper oxychloride Ba3Y2O5Cl2: First example of oxide-ion conducting oxychloride
Hiroshi Yaguchi, Kotaro Fujii, Yoshinori Tsuchiya, Hiraku Ogino, Yoshihiro Tsujimoto, Masatomo Yashima
ACS Appl. Energy Mater., 2022, 5(1), 295-304.https://doi.org/10.1021/acsaem.1c02828
Oxide-ion and proton conductivity of the ordered perovskite BaY1/3Ga2/3O2.5
Kei Saito, Kotaro Fujii, Masatomo Yashima
J. Solid State Chem., 2021, 306, 122733.https://doi.org/10.1016/j.jssc.2021.122733
Na+ diffusion mechanism and transition metal substitution in tunnel-type manganese-based oxides for Na-ion rechargeable batteries
Irene Quinzeni, Kotaro Fujii, Marcella Bini, Masatomo Yashima, Cristina Tealdi
Mater. Adv., 2021, 3, 986-997.https://doi.org/10.1039/D1MA00901J
Effect of La vacancies on the oxide-ion conduction in lanthanum silicate apatites
Yusuke Ogura, Tatsuya Yokoi, Kotaro Fujii, Masatomo Yashima, Katsuyuki Matsunaga
Solid State Ionics, 2021, 373(15), 115793.https://doi.org/10.1016/j.ssi.2021.115793
Site-Selective Eu3+ Luminescence in the Monoclinic Phase of YSiO2N
Yuuki Kitagawa, Jumpei Ueda, Kotaro Fujii, Masatomo Yashima, Shiro Funahashi, Takayuki Nakanishi, Takashi Takeda, Naoto Hirosaki, Kenta Hongo, Ryo Maezono, Setsuhisa Tanabe
Chem. Mater., 2021, 33(22), 8873–8885.https://doi.org/10.1021/acs.chemmater.1c03139
Electrochemical Crystal Growth of Titanium Oxyfluorides—A Strategy for Development of Electron-Doped Materials
Yusuke Chiba, Kengo Shibata, Hiroshi Takatsu, Kotaro Fujii, Miwa Saito, Hiroshi Kageyama, Kazuhiko Maeda, Masatomo Yashima, Teruki Motohashi
Inorg. Chem., 2021, 60(19), 14613-14621.https://doi.org/10.1021/acs.inorgchem.1c01640
Experimental visualization of the interstitialcy diffusion of anions in an LaOF-based oxyfluoride La0.9Sr0.1O0.45F2
Keisuke Hibino, Mahiro Tanaka, Satoshi Kozakai, Kotaro Fujii, Tatsumi Ishihara, James R. Hester, Masatomo Yashima
ACS Appl. Energy Mater., 2021, 4(9), 8891-8900.https://doi.org/10.1021/acsaem.1c01097
Mixed alkali-ion transport and storage in atomic-disordered honeycomb layered NaKNi2TeO6
Titus Masese, Yoshinobu Miyazaki, Josef Rizell, Godwill Mbiti Kanyolo, Chih-Yao Chen, Hiroki Ubukata, Keigo Kubota, Kartik Sau, Tamio Ikeshoji, Zhen-Dong Huang, Kazuki Yoshii, Teruo Takahashi, Miyu Ito, Hiroshi Senoh, Jinkwang Hwang, Kazuhiko Matsumoto, Toshiyuki Matsunaga, Kotaro Fujii, Masatomo Yashima, Masahiro Shikano, Cédric Tassel, Hiroshi Kageyama, Yoshiharu Uchimoto, Rika Hagiwara, Tomohiro Saito
Nat. Commum., 2021, 12, 4660.https://doi.org/10.1038/s41467-021-24694-5
Kinetically Stabilized Cation Arrangement in Li3YCl6 Superionic Conductor during Solid-State Reaction
Hiroaki Ito, Kazuki Shitara, Yongming Wang, Kotaro Fujii, Masatomo Yashima, Yosuke Goto, Chikako Moriyoshi, Nataly Carolina Rosero-Navarro, Akira Miura, Kiyoharu Tadanaga
Adv. Sci., 2021, 8(15), 2101413.https://doi.org/10.1002/advs.202101413
A Sn-Based Perovskite with a Wide Visible Light Absorption Band Assisted by Hydride Doping
Masashi Nakamura, Hiroshi Watanabe, Hirofumi Akamatsu, Kotaro Fujii, Masatomo Yashima, George Hasegawa, Miki Inada, Katsuro Hayashi, Kazuhiko Maeda
Chem. Mater., 2021, 33(10), 3631-3638.https://doi.org/10.1021/acs.chemmater.1c00460
Protonic conduction in BaNdInO4 structure achieved by acceptor doping
Yu Zhou, Masahiro Shiraiwa, Masanori Nagao, Kotaro Fujii, Isao Tanaka, Masatomo Yashima, Laura Baque, Juan F. Basbus, Liliana Mogni, Stephen J. Skinner
Chem. Mater., 2021, 33(6), 2139–2146.https://doi.org/10.1021/acs.chemmater.0c04828
Ternary carbodiimide compound, Ba0.9Sr0.1NCN with distorted rutile-type structure
Yuji Masubuchi, Suzuka Miyazaki, Kotaro Fujii, Masatomo Yashima, Akira Miura, Mikio Higuchi
J. Solid State Chem., 2021, 296, 122000.https://doi.org/10.1016/j.jssc.2021.122000
High-temperature proton conductors based on the (110) layered perovskite BaNdScO4
Masahiro Shiraiwa, Takafusa Kido, Kotaro Fujii, Masatomo Yashima
J. Mater. Chem. A, 2021, 9(13), 8607-8619.https://doi.org/10.1039/D0TA11573H
High oxide-ion conductivity through the interstitial oxygen site in Ba7Nb4MoO20-based hexagonal perovskite related oxides
Masatomo Yashima, Takafumi Tsujiguchi, Yuichi Sakuda, Yuta Yasui, Yu Zhou, Kotaro Fujii, Shuki Torii, Takashi Kamiyama, Stephen J. Skinner
Nat. Commum., 2021, 12, 556.https://doi.org/10.1038/s41467-020-20859-w
Hydride-based antiperovskites with soft anionic sublattices as fast alkali ionic conductors
Shenghan Gao, Thibault Broux, Susumu Fujii, Cédric Tassel, Kentaro Yamamoto, Yao Xiao, Hiroki Ubukata, Yuki Watanabe, Kotaro Fujii, Masatomo Yashima, Akihide Kuwabara, Yoshiharu Uchimoto, Hiroshi Kageyama
Nat. Commum., 2021, 12, 201.https://doi.org/10.1038/s41467-020-20370-2
Ionic conduction mechanism in Ca-doped Lanthanum Oxychloride
Kazuki Shitara, Akihide Kuwabara, Keisuke Hibino, Kotaro Fujii, Masatomo Yashima, James R. Hester, Masanori Umeda, Naoyoshi Nunotani, Nobuhito Imanaka
Dalton Trans., 2021, 50(1), 151-156.https://doi.org/10.1039/D0DT02502J
Strain-induced creation and switching of anion vacancy layers in perovskite oxynitrides
Takafumi Yamamoto, Akira Chikamatsu, Shunsaku Kitagawa, Nana Izumo, Shunsuke Yamashita, Hiroshi Takatsu, Masayuki Ochi, Takahiro Maruyama, Morito Namba, Takahide Nakashima, Fumitaka Takeiri, Kotaro Fujii, Masatomo Yashima, Yuki Sugisawa, Masahito Sano, Yasushi Hirose, Daiichiro Sekiba, Craig M. Brown, Takashi Honda, Kazutaka Ikeda, Toshiya Otomo, Kazuhiko Kuroki, Kenji Ishida, Takao Mori, Koji Kimoto, Tetsuya Hasegawa, Hiroshi Kageyama
Nat. Commum., 2020, 11, 5923.https://doi.org/10.1038/s41467-020-19217-7
Synthesis, structure and luminescence properties of layered oxychloride Ba3Y2O5Cl2
Yuki Iwasa, Yu Su, Yoshinori Tsuchiya, Makoto Tatsuda, Kohji Kishioa, Takayuki Yanagida, Fumi Takada, Taichiro Nishio, Yoshihiro Tsujimoto, Kotaro Fujii, Masatomo Yashima, Hiraku Ogino
J. Mater. Chem. C, 2020, 8(48), 17162-17168.https://doi.org/10.1039/D0TC04415F
Dion–Jacobson-type oxide-ion conductor CsLa2Ti2NbO10−δ without phase transitions
Wenrui Zhang, Kotaro Fujii, Tomohiro Ishiyama, Harue Kandabashi, Masatomo Yashima
J. Mater. Chem. A, 2020, 8(47), 25085-25093.https://doi.org/10.1039/D0TA06135B
Responsive four-coordinate Fe(II) nodes in FePd(CN)4
Ryo Ohtani, Hiromu Matsunari, Takafumi Yamamoto, Koji Kimoto, Masaaki Isobe, Kotaro Fujiie Masatomo Yashima, Susumu Fujii, Akihide Kuwabara, Yuh Hijikata, Shin-ishiro Noro, Masaaki Ohba, Hiroshi Kageyama, Shinya Hayami
Angew. Chem. Int. Ed., 2020, 59(43), 19254-19259.https://doi.org/10.1002/anie.202008187
Synthesis and Photoluminescence Properties of Rare-Earth-Activated Sr3-xAxAlO4H (A =Ca, Ba; x = 0, 1): New Members of Aluminate Oxyhydrides
Tong Wu, Kotaro Fujii, T. Murakami, Masatomo Yashima, Satoru Matsuishi
Inorg. Chem., 2020, 59(20), 15384–15393.https://doi.org/10.1021/acs.inorgchem.0c02356
Cation- and anion-ordered rutile-type derivative LiTeO3(OH)
Kotaro Fujii, Yume Yoshida, Yue Jin Shan, Keitaro Tezuka, Yoshiyuki Inaguma, Masatomo Yashima
Chem. Comm., 2020, 56(69), 10042-10045.https://doi.org/10.1039/D0CC04074F
Synthesis of Three-layer Perovskite Oxynitride K2Ca2Ta3O9N·2H2O and Photocatalytic Activity for H2 Evolution under Visible Light
Ya Tang, Kosaku Kato, Takayoshi Oshima, Hiroto Mogi, Akinobu Miyoshi, Kotaro Fujii, Kei-ichi Yanagisawa, Koji Kimoto, Akira Yamakata, Masatomo Yashima, Kazuhiko Maeda
Inorg. Chem., 2020, 59(15), 11122-11128.https://doi.org/10.1021/acs.inorgchem.0c01607
Single-crystal growth, structure and luminescence properties of Cs2HfCl3Br3
Shohei Kodama, Shunsuke Kurosawa, Kotaro Fujii, Taito Murakami, Masatomo Yashima, Jan Pejchal, Robert Král, Martin Nikl, Akihiro Yamaji, Masao Yoshino, Satoshi Toyoda, Hiroki Sato, Yuji Ohashi, Kei Kamada, Yuui Yokota
Opt. Mater., 2020, 106, 109942.https://doi.org/10.1016/j.optmat.2020.109942
New Structure Family of Oxide-ion Conductors Based on BaGdInO4
Hiroshi Yaguchi, Kotaro Fujii, Masatomo Yashima
J. Mater. Chem. A, 2020, 8(17), 8638-8647.https://doi.org/10.1039/C9TA13704A
Oxide-Ion Conduction in the Dion-Jacobson Phase CsBi2Ti2NbO10−δ
Wenrui Zhang, Kotaro Fujii, Eiki Niwa, Masato Hagihala, Takashi Kamiyama, Masatom Yashima
Nat. Commum., 2020, 11, 1224.https://doi.org/10.1038/s41467-020-15043-z
Two-Dimensional Perovskite Oxynitride K2LaTa2O6N with an H+/K+ Exchangeability in Aqueous Solution to Form Stable Photocatalyst for Visible‐Light H2 Evolution
Takayoshi Oshima, Tom Ichibha, Kenji Oqmhula, Keisuke Hibino, Hiroto Mogi, Shunsuke Yamashita, Kotaro Fujii. Yugo Miseki, Kenta Hongo, Daling Lu, Ryo Maezono, Kazuhiro Sayama, Masatomo Yashima, Koji Kimoto, Hideki Kato, Masato Kakihana, Hiroshi Kageyama, Kazuhiko Maeda
Angew. Chem. Int. Ed., 2020, 59(24), 9736-9743.https://doi.org/10.1002/ange.202002534
Crystalline Li2CaSiO4 as a highly active catalyst for oxidative coupling of methane
Tomohiro Matsumoto, Miwa Saito, Satoshi Ishikawa, Kotaro Fujii, Masatomo Yashima, Wataru Ueda, Teruki Motohashi
ChemCatChem, 2020, 12(7), 1968-1972.https://doi.org/10.1002/cctc.201902241
Polymorphism and Temperature-Induced Phase Transitions of Na2CoP2O7
Maxim Avdeev, Chin-Wei Wang, Prabeer Barpanda, Kotaro Fujii, Masatomo Yashima
Inorg. Chem., 2019, 58(24), 16823-16830.https://doi.org/10.1021/acs.inorgchem.9b03014
Preparation and thermal stability of oxynitride perovskite solid solution Sr1-xLaxTa1-xTixO2N
Yuji Masubuchi, Sota Ohtaki, Kotaro Fujii, Masatomo Yashima, Mikio Higuchi, Shinichi Kikkawa
J. Eur. Ceram. Soc., 2020, 40(16), 6288-6292.https://doi.org/10.1016/j.jeurceramsoc.2019.10.004
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
Yuta Yasui, Eiki Niwa, Masahiro Matsui, Kotaro Fujii, Masatomo Yashima
Inorg. Chem., 2019, 58(14), 9460-9468.https://doi.org/10.1021/acs.inorgchem.9b01300
Stepwise topochemical fluorination of SrCrO3 perovskite via a super-structured oxide
Yu Su, Yoshihiro Tsujimoto, Kotaro Fujii, Yuji Masubuchi, Hirohito Ohata, Hideo Iwai, Masatomo Yashima, Kazunari Yamaura
Chem. Comm., 2019, 55(50), 7239-7242.https://doi.org/10.1039/C9CC02512J
Oxide-ion Diffusion Mechanism and Oxygen Deficiency δ of Hexagonal Perovskite-Related Oxide Ba3MoNbO8.5–δ
Masatomo Yashima, Takafumi Tsujiguchi, Kotaro Fujii, Eiki Niwa, Shunta Nishioka, James R. Hester, Kazuhiko Maeda
J. Mater. Chem. A, 2019, 7(23), 13910-13916.https://doi.org/10.1039/C9TA03588E
Synthesis of Ba1-xSrxYSi2O5N and Discussion based on Structure Analysis and DFT Calculation
Takuya Yasunaga, Makoto Kobayashi, Kenta Hongo, Kotaro Fujii, Shunsuke Yamamoto, Ryo Maezono, Masatomo Yashima, Masaya Mitsuishi, Hideki Kato, Masato Kakihana
J. Solid State Chem., 2019, 276, 266―271.https://doi.org/10.1016/j.jssc.2019.05.012
Thermal expansion and P-V-T equation of state of cubic silicon nitride
Norimasa Nishiyama, Kotaro Fujii, Eleonora Kulik, Masahiro Shiraiwa, Nico A Gaida, Yuji Higo, Yoshinori Tange, Astrid Holzheid, Masatomo Yashima, Fumihiro Wakai
J. Eur. Ceram. Soc., 2019, 39(13), 3627-3633.https://doi.org/10.1016/j.jeurceramsoc.2019.05.003
Synthesis of a Layered Niobium Oxynitride Rb2NdNb2O6N·H2O Showing Visible-Light Photocatalytic Activity for H2 Evolution
Haruki Wakayama, Keisuke Hibino, Kotaro Fujii, Takayoshi Oshima, Keiichi Yanagisawa, Yuuga Kobayashi, Koji Kimoto, Masatomo Yashima, Kazuhiko Maeda
Inorg. Chem., 2019, 58(9), 6161-6166.https://doi.org/10.1021/acs.inorgchem.9b00414
Crystal structures of Ca4+xY3–xSi7O15+xN5–x (0 ≤ x ≤ 1) comprising of an isolated [Si7(O,N)19] unit
Makoto Kobayashi, Takuya Yasunaga, Hideki Kato, Kotaro Fujii, Masatomo Yashima, Masato Kakihana
Acta Crystallogr. Sect. E Struct. Reports Online, 2019, 75, 260-263.https://doi.org/10.1107/S2056989019001257
Crystal structure analysis and evidence of mixed anion coordination at Ce3+ site in Y3Al2(Al, Si)3(O,N)12 oxynitride garnet phosphor
Kazuki Asami, Masahiro Shiraiwa, Jumpei Ueda, Kotaro Fujii, Masatomo Yashima, Kenta Hongo, Ryo Maezono, Mikhail G. Brik, Setsuhisa Tanabe
J. Mater. Chem. C, 2019, 7(5), 1330-1336.https://doi.org/10.1039/C8TC04980G
Redshift and thermal quenching of Ce3+ emission in (Gd,Y)3(Al, Si)5(O, N)12 oxynitride garnet phosphors
Kazuki Asami, Jumpei Ueda, Masahiro Shiraiwa, Kotaro Fujii, Masatomo Yashima, Setsuhisa Tanabe
Opt. Mater., 2019, 87, 117-121.https://doi.org/10.1016/j.optmat.2018.04.049
Preparation and photocatalytic activity of Mo-modified Ti-doped HAp
Noppakhate Jiraborvornpongsa, Toshihiro Isobe, Sachiko Matsushita, Mitsutake Oshikiri, Masato Wakamura, Kotaro Fujii, Masatomo Yashima, Akira Nakajima
Appl. Catal. B, 2019, 243, 448-454.https://doi.org/10.1016/j.apcatb.2018.10.056
Ce4+-Based Compounds Capable of Photoluminescence by Charge Transfer Excitation under Near-Ultraviolet−Visible Light
Dawei Wen, Hideki Kato, Makoto Kobayashi, Kotaro Fujii, Masatomo Yashima, Masato Kakihana
Inorg. Chem., 2018, 57(23), 14524-14531.https://doi.org/10.1021/acs.inorgchem.8b01900
Pr/Ba cation-disordered perovskite Pr2/3Ba1/3CoO3-δ as a new bifunctional electrocatalyst for oxygen reduction and oxygen evolution reactions
Wenrui Zhang, Masahiro Shiraiwa, Nannan Wang, Tingli Ma, Kotaro Fujii, Eiki Niwa, Masatomo Yashima
J. Ceram. Soc. Jpn., 2018, 126(10), 814-819.https://doi.org/10.2109/jcersj2.18076
Discovery and development of BaNdInO4 - A brief review -
Kotaro Fujii, Masatomo Yashima
J. Ceram. Soc. Jpn., 2018, 126(10), 852-859.https://doi.org/10.2109/jcersj2.18110
Function of Tetrahedral ZnS3O Building Blocks in the Formation of SrZn2S2O: A Phase Matchable Polar Oxysulfide with a Large Second Harmonic Generation Response
Yoshihiro Tsujimoto, Christian Juillerat, Weiguo Zhang, Kotaro Fujii, Masatomo Yashima, P. Shv Halasyaman, Hans-Conrad zur Loye
Chem. Mater., 2018, 30(18), 6486–6493.https://doi.org/10.1021/acs.chemmater.8b02967
Structural Change in SrSiO3 Induced by Introduction of Nitrogen
Makoto Kobayashi, Jihae Kim, Hironori Sato, Takuya Yasunaga, Hideki Kato, KotaroFujii, Masahiro Shiraiwa, Masatomo Yashima, Masato Kakihana
Chem. Lett., 2018, 47(10), 1327-1329.https://doi.org/10.1246/cl.180620
Chemical Pressure-induced Anion Order-disorder Transition in LnHO Enabled by Hydride Size Flexibility
Hiroki Yamashita, Thibault Broux, Yoji Kobayashi, Fumitaka Takeiri, Tong Zhu, Michael A. Hayward, Kotaro Fujii, Masatomo Yashima, Kazuki Shitara, Akihide Kuwabara, Taito Murakami, Hiroshi Kageyama
J. Am. Chem. Soc., 2018, 140(36), 11170–11173.https://doi.org/10.1021/jacs.8b06187
A Systematic Evaluation of the Role of the Lanthanide Elements in Complex Functional Oxides; Implications for Energy Conversion Devices
Ji Wu, Kotaro Fujii, Masatomo Yashima, Aleksandar Staykov, Taner Akbay, Tatsumi Ishihara, John A. Kilner
J. Mater. Chem. A, 2018, 6(25), 11819-11829.https://doi.org/10.1039/C8TA01191E
Undoped Layered Perovskite Oxynitride Li2LaTa2O6N for Photocata-lytic CO2 Reduction with Visible Light
Takayoshi Oshima, Tom Ichibha, Ken Sinkou Qin, Kanemichi Muraoka, Junie Jhon M. Vequizo, Keisuke Hibino, Ryo Kuriki, Shunsuke Yamashita, Kenta Hongo, Tomoki Uchiyama, Kotaro Fujii, Daling Lu, Ryo Maezono, Akira Yamakata, Hideki Kato, Koji Kimoto, Masatomo Yashi-ma, Yoshiharu Uchimoto, Masato Kakihana, Osamu Ishitani, Hiroshi Kageyama, Kazuhiko Maeda
Angew. Chem. Int. Ed., 2018, 57(27), 8154-8158.https://doi.org/10.1002/anie.201803931
A new structure family of oxide-ion conductor Ca0.8Y2.4Sn0.8O6 discovered by a combined technique of the bond-valence method and experiments
Ryota Inoue, Kotaro Fujii, Masahiro Shiraiwa, Eiki Niwa, Masatomo Yashima
Dalton Trans., 2018, 47(22), 7515-7521.https://doi.org/10.1039/C8DT01024B
High oxide-ion conductivity by the overbonded channel oxygens in Si-deficient La9.565(Si5.826□0.174)O26 apatite without interstitial oxygens
Kotaro Fujii, Masatomo Yashima, Keisuke Hibino, Masahiro Shiraiwa, Koichiro Fukuda, Susumu Nakayama, Nobuo Ishizawa, Takayasu Hanashima, Takashi Ohhara
J. Mater. Chem. A, 2018, 6(23), 10835-10846.https://doi.org/10.1039/C8TA02237B
Experimental visualization of oxide-ion diffusion paths in pyrochlore-type Yb2Ti2O7
Wataru Uno, Kotaro Fujii, Eiki Niwa, Shuki Torii, Ping Miao, Takashi Kamiyama, Masatomo Yashima
J. Ceram. Soc. Jpn., 2018, 126(5), 341-345.https://doi.org/10.2109/jcersj2.17253
Crystal structure and electrical conductivity of BaR2ZnO5 (R = Sm, Gd, Dy, Ho, and Er) – A new structure family of oxide-ion conductors
Keigo Nakamura, Kotaro Fujii, Eiki Niwa, Masatomo Yashima
J. Ceram. Soc. Jpn., 2018, 126(5), 292-299.https://doi.org/10.2109/jcersj2.17252
Synthesis, Crystal Structure and Optical Properties of New Layered Perovskite Scandium Oxychlorides: Sr2ScO3Cl, Sr3Sc2O5Cl2, and Ba3Sc2O5Cl2
Yu Su, Yoshihiro Tsujimoto, Kotaro Fujii, Makoto Tatsuta, Kengo Oka, Masatomo Yashima, Hiraku Ogino, Kazunari Yamaura
Inorg. Chem., 2018, 57(9), 5615-5623.https://doi.org/10.1021/acs.inorgchem.8b00573
A New Precursor Route Using a Compositionally Flexible Layered Oxide and Nanosheet for Improved Nitrogen Doping and Photocatalytic Activity
Kazuhiko Maeda, Yuki Tokunaga, Keisuke Hibino, Kotaro Fujii, Miharu Eguchi, Shintaro Ida, Masatomo Yashima
ACS Appl. Energy Mater., 2018, 1(4), 1734–1741.https://doi.org/10.1021/acsaem.8b00256
High pressure synthesis of hydride-fluoride pyrochlore NaCaMg2F7–xHx
Kazunari Arai, Yoji Kobayashi, Ya Tang, Yusuke Tsutsui, Daisuke Sakamaki, Takafumi Yamamoto, Kotaro Fujii, Masatomo Yashima, Shu Seki, Hiroshi Kageyama
Chem. Lett., 2018, 47(7), 829-832.https://doi.org/10.1246/cl.180256
Single crystal growth of Sillén–Aurivillius perovskite oxyhalides Bi4NbO8X (X = Cl, Br)
Chengchao Zhong, Fumitaka Takeiri, Daichi Kato, Kotaro Fujii, Masatomo Yashima, Yasuhiro Fujii, Akitoshi Koreeda, Cédric Tassel, Ryu Abe, Hiroshi Kageyama
Inorganics, 2018, 6(2), 41.https://doi.org/10.3390/inorganics6020041
A Quasi-two-dimensional metallic behavior in BaVO3–xHx (0.3 ≤ x ≤ 0.9) with Face- and Corner-sharing Octahedra
Takafumi Yamamoto, Kazuki Shitara, Shunsaku Kitagawa, Akihide Kuwabara, Masahiro Kuroe, Kenji Ishida, Masayuki Ochi, Kazuhiko Kuroki, Kotaro Fujii, Masatomo Yashima, Craig M. Brown, Hiroshi Takatsu, Tassel Cedric, Hiroshi Kageyama
Chem. Mater., 2018, 30(5), 1566-1574.https://doi.org/10.1021/acs.chemmater.7b04571
Weak ferromagnetic ordering in brownmillerite Ca2Fe2O5 and its effect on electric field gradients
Isao Kagomiya, Yuki Hirota, Ken-ichi Kakimoto, Kotaro Fujii, Masahiro Shiraiwa, Masatomo Yashima, Akio Fuwa, Shin Nakamura
Phys. Chem. Chem. Phys., 2017, 19(46), 31194-31201.https://doi.org/10.1039/c7cp04520d
Crystal Structure, Electron Density and Characterization of Visible-Light Responsive Photocatalysts, (BaTaO2N)1–x(SrWO2N)x Solid Solutions
Keisuke Hibino, Masatomo Yashima, Takayoshi Oshima, Kotaro Fujii, Kazuhiko Maeda
Dalton Trans., 2017, 46(43), 14947-14956.https://doi.org/10.1039/C7DT02873C
Crystal Structure and Oxide-Ion Conductivity of Ba1+xNd1−xInO4−x/2
Masahiro Shiraiwa, Kotaro Fujii, Yuichi Esaki, Su Jae Kim, Seongsu Lee, Masatomo Yashima
J. Electrochem. Soc., 2017, 164(13), F1392-F1399.https://doi.org/10.1149/2.0411713jes
Crystal-structure and electron-density analyses of the perovskite-type oxynitrides BaNbO2N and SrNbO2N through synchrotron X-ray powder diffraction
Kotaro Fujii, Kazuho Shimada, Masatomo Yashima
J. Ceram. Soc. Jpn., 2017, 125(11), 808-810.https://doi.org/10.2109/jcersj2.17177
New Oxide-Ion Conductor SrYbInO4 with Partially Cation-Disordered CaFe2O4-Type Structure
Ayaka Fujimoto, Masatomo Yashima, Kotaro Fujii, James R. Hester
J. Phys. Chem. C, 2017, 121(39), 21272-21280.https://doi.org/10.1021/acs.jpcc.7b07911
Synthesis, Structure and Photoluminescence of a Novel Oxynitride BaYSi2O5N Activated by Eu2+ and Ce3+
Makoto Kobayashi, Takuya Yasunaga, Hironori Sato, Hideki Kato, Kotaro Fujii, Masatomo Yashima, Masato Kakihana
Chem. Lett., 2017, 46(6), 795-797.https://doi.org/10.1246/cl.170144
Control of the reversibility during boronic ester formation: application to the construction of ferrocene dimers and trimers
Kosuke Ono, Yohei Tohyama, Tatsuhiro Uchikura, Yuji Kikuchi, Kotaro Fujii, Hidehiro Uekusa and Nobuharu Iwasawa
Dalton Trans., 2017, 46(7), 2370-2376.https://doi.org/10.1039/C6DT04845E
Hydrothermal Synthesis, Crystal Structure, and Superconductivity of a Double-Perovskite Bi Oxide
Mirza H. K. Rubel, Takahiro Take, Nobuhiro Kumada, M. Mozahar Ali, Akira Miura Kiyoharu Tadanaga, Kengo Oka, Masaki Azuma, Masatomo Yashima, Kotaro Fujii, Eisuke Magome, Chikako Moriyoshi, Yoshihiro Kuroiwa, James R. Hester, and Maxim Avdeev
Chem. Mater., 2016, 28(2), 459-465.https://doi.org/10.1021/acs.chemmater.5b02386
Improved oxide-ion conductivity of NdBaInO4 by Sr doping
Kotaro Fujii, Masahiro Shiraiwa, Yuichi Esaki, Masatomo Yashima, Su Jae Kim and Seongsu Lee
J. Mater. Chem. A, 2015, 3(22), 11985-11990.https://doi.org/10.1039/C5TA01336D
Structure Determination from Powder X-ray Diffraction Data of Black Azo (Hydrazone) Pigments
Junji Otani, Michio Matsumura, Kotaro Fujii, Hidehiro Uekusa
Chem. Lett., 2015, 44(5), 662-664.https://doi.org/10.1246/cl.150036
Structural Origin of the Anisotropic and Isotropic Thermal Expansion of K2NiF4-Type LaSrAlO4 and Sr2TiO4
Keishi Kawamura, Masatomo Yashima, Kotaro Fujii, Kazuki Omoto, Keisuke Hibino, Shuntaro Yamada, James R. Hester, Maxim Avdeev, Ping Miao, Shuki Torii, Takashi Kamiyama
Inorg. Chem., 2015, 54(8), 3896-3904.https://doi.org/10.1021/acs.inorgchem.5b00102
Defect induced sodium disorder and ionic conduction mechanism in Na1.82Mg1.09P2O7
Guandong Liu, Shin-ichi Nishimura, Sai Cheong Chung, Kotaro Fujii, Masatomo Yashima, Atsuo Yamada
J. Mater. Chem. A, 2014, 2(43), 18353-18359.https://doi.org/10.1039/C4TA03356F
Almost Perfect Frustration in the Dimer Magnet Ba2CoSi2O6Cl2
Hidekazu Tanaka, Nobuyuki Kurita, Makiko Okada, Eiji Kunihiro, Yutaka Shirata, Kotaro Fujii, Hidehiro Uekusa, Akira Matsuo, Koichi Kindo, Hiroyuki Nojiri
J. Phys. Soc. Jpn., 2014, 83(10), 103701/1-5.https://doi.org/10.7566/JPSJ.83.103701
New Perovskite-Related Structure Family of Oxide-Ion Conducting Materials NdBaInO4
Kotaro Fujii Yuichi Esaki, Kazuki Omoto, Masatomo Yashima, Akinori Hoshikawa, Toru Ishigaki, James R. Hester
Chem. Mater., 2014, 26(8), 2488-2491.https://doi.org/10.1021/cm500776x
Diffusion Path and Conduction Mechanism of Protons in Hydroxyapatite
Masatomo Yashima, Naoyuki Kubo, Kazuki Omoto, Hirotaka Fujimori, Kotaro Fujii, Kenji Ohoyama
J. Phys. Chem. C, 2014, 118(10), 5180-5187.https://doi.org/10.1021/jp412771f
Polymorphic and pseudomorphic transformation behavior of acyclovir based on thermodynamics and crystallography
Katsuhide Terada, Hiroyuki Kurobe, Masataka Ito, Yasuo Yoshihashi, Etsuo Yonemochi, Kotarou Fujii, Hidehiro Uekusa
J. Therm. Anal. Calorim., 2013, 113(3), 1261-1267.https://doi.org/10.1007/s10973-013-3140-1
Structural understanding of solid-state photodimerization reactions of cinnamic amide derivatives in terms of reaction cavities - color developer for thermosensitive paper
Satoshi Kodama, Kohei Johmoto, Akiko Sekine, Kotaro Fujii, Hidehiro Uekusa
CrystEngComm, 2013, 15(23), 4667-4675.https://doi.org/10.1039/c3ce40130h
Experimental visualization of the Bi-O covalency in ferroelectric bismuth ferrite (BiFeO3) by synchrotron X-ray powder diffraction analysis
Kotaro Fujii, Hiroki Kato, Kazuki Omoto, Masatomo Yashima, Jun Chen, Xianran Xing
Phys. Chem. Chem. Phys., 2013, 15(18), 6779-6782.https://doi.org/10.1039/C3CP50236H
Solid-State Hydration/Dehydration of Erythromycin A Investigated by ab Initio Powder X-ray Diffraction Analysis: Stoichiometric and Nonstoichiometric Dehydrated Hydrate
Kotaro Fujii, Masahide Aoki, Hidehiro Uekusa
Cryst. Growth Des., 2013, 13(5), 2060-2066.https://doi.org/10.1021/cg400121u
Reversible Solid State Redox of an Octacyanometallate-Bridged Coordination Polymer by Electrochemical Ion Insertion/Extraction
Masashi Okubo, Koichi Kagesawa, Yoshifumi Mizuno, Daisuke Asakura, Eiji Hosono, Tetsuichi Kudo, Haoshen Zhou, Kotaro Fujii, Hidehiro Uekusa, Shin-ichi Nishimura, Atsuo Yamada, Atsushi Okazawa, Norimichi Kojima
Inorg. Chem., 2013, 52(7), 3772-3779.https://doi.org/10.1021/ic302364d
Mechanism of Dehydration-Hydration Processes of Lisinopril Dihydrate Investigated by ab Initio Powder X-ray Diffraction Analysis
Kotaro Fujii, Hidehiro Uekusa, Naoko Itoda, Etsuo Yonemochi,Katsuhide Terada
Cryst. Growth Des., 2012, 12(12), 6165-6172.https://doi.org/10.1021/cg3013377
Guest-induced self-assembly of a macrocyclic boronic ester containing diarylethene units: enhancement of photoresponsivity
Nobuharu Iwasawa, Hiroki Takahagi, Kosuke Ono, Kotaro Fujii, Hidehiro Uekusa
Chem. Comm., 2012, 48(60), 7477-7479.https://doi.org/10.1039/c2cc31989f
Cocrystallization and amorphization induced by drug-excipient interaction improves the physical properties of acyclovir
Takaaki Masuda, Yasuo Yoshihashi, Etsuo Yonemochi, Kotaro Fujii, Hidehiro Uekusa, Katsuhide Terada
Int. J. Pharm., 2012, 422(1-2), 160-169.https://doi.org/10.1016/j.ijpharm.2011.10.046
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 Keat Lim, Kotaro Fujii, Kenneth D. M Harris, David C. Apperley
Cryst. Growth Des., 2011, 11(12), 5192-5199.https://doi.org/10.1021/cg201230k
Reversible Color Switching of an Organic Crystal Induced by Organic Solvent Vapors
Kotaro Fujii, Aya Sakon, Akiko Sekine, Hidehiro Uekusa
Cryst. Growth Des., 2011, 11(10), 4305-4308.https://doi.org/10.1021/cg2010437
Supramolecular Networks in Crystalline Inclusion Complexes Formed from a New Host: 2,2-Bis(4-hydroxy-3-phenylphenyl)-1Hindene-1,3(2H)-dione
Kenta Kasugai, Suzumi Hashimoto, Kazunori Imai, Aya Sakon, Kotaro Fujii, Hidehiro Uekusa, Naoto Hayashi, Keiji Kobayashi
Cryst. Growth Des., 2011, 11(9), 4044-4052.https://doi.org/10.1021/cg200554f
Cooperativity in Solid-State Squaramides
Rafel Prohens, Anna Portell, Cristina Puigjaner, Salvador Tomas, Kotaro Fujii, Kenneth D. M. Harris, Xavier Alcobe, Merce Font-Bardia, Rafael Barbas
Cryst. Growth Des., 2011, 11(9), 3725-3730.https://doi.org/10.1021/cg200772e
Structural Chemistry of a New Chiral Anhydrous Phase of Ru(bipy)3(ClO4)2 Established from Powder X-ray Diffraction Analysis
Eugene Y. Cheung, Kotaro Fujii, Fang Guo, Kenneth D. M. Harris, Sayoko Hasebe, Reiko Kuroda
Cryst. Growth Des., 2011, 11(8), 3313-3317.https://doi.org/10.1021/cg200379h
Potential of synchrotron X-ray powder diffractometry for detection and quantification of small amounts of crystalline drug substances in pharmaceutical tablets
Hiroyuki Yamada, Katsuhiko Masuda, Takayuki Ishige, Kotaro Fujii, Hidehiro Uekusa, Keiko Miura, Etsuo Yonemochi, Katsuhide Terada
J. Pharm. Biomed. Anal., 2011, 56(2), 448-453.https://doi.org/10.1016/j.jpba.2011.05.038
Exploiting powder X-ray diffraction for direct structure determination in structural biology: The P2X4 receptor trafficking motif YEQGL
Kotaro Fujii, Mark T. Young, Kenneth D.M. Harris
J. Struct. Biol., 2011, 174(3), 461-467.https://doi.org/10.1016/j.jsb.2011.03.001
Metastable polymorphic form of isopropylbenzophenone derivative directly obtained by the solid-state photoreaction investigated by ab initio powder X-ray diffraction analysis
Kotaro Fujii, Hidehiro Uekusa, Michitaro Fukano,Hideko Koshima
CrystEngComm, 2011, 13(9), 3197-3201.https://doi.org/10.1039/c0ce00500b
In situ observation and mechanistic elucidation of metastable colored species in crystalline state photochromism of trans-biindenylidenedione
Kotaro Fujii, Kumiko Aruga, Akiko Sekine, Hidehiro Uekusa, Katsuya Sohno, Koichi Tanaka
CrystEngComm, 2011, 13(3), 731-733.https://doi.org/10.1039/c0ce00642d
Study of the Pseudo-Crystalline Transformation from Form I to Form II of Thiamine Hydrochloride (Vitamin B1)
Katsuhiko Masuda, Takayuki Ishige, Hiroyuki Yamada, Kotaro Fujii, Hidehiro Uekusa, Keiko Miura, Etsuo Yonemochi, Katsuhide Terada
Chem. Pharm. Bull., 2011, 59(1), 57-62.https://doi.org/10.1248/cpb.59.57
Cocrystalline Phase Transformation of Binary Mixture of Trimethoprim and Sulfamethoxazole by Slurry Technique
Erizal Zaini, Yeyet C. Sumirtapura, Sundani N. Soewandhi, Auzal Halim, Hidehiro Uekusa, Kotaro Fujii
Asian J. Pharm. Clin. Res., 2010, 3(4), 26-29.NODOI
Direct structure elucidation by powder X-ray diffraction of a metal-organic framework material prepared by solvent-free grinding
Kotaro Fujii, Ana Lazuen Garay, Janeen Hill, Elena Sbircea, Zhigang Pan, Mingcan Xu, David C. Apperley, Stuart L. James, Kenneth D. M. Harris
Chem. Comm., 2010, 46(40), 7572-7574.https://doi.org/10.1039/c0cc02635b
Potassium clavulanate
Kotaro Fujii, Kazuyuki Toyota, Akiko Sekine, Hidehiro Uekusa, Ilma Nugrahani, Sukmadjaja Asyarie, N. Sundani Soewandhi, Slamet Ibrahim
Acta Crystallogr. Sect. E Struct. Reports Online, 2010, 66, m985-m986.https://doi.org/10.1107/S1600536810027984
Arrays of P=O Dipoles As a Recurrent Structural Motif in Bis-Diphenylphosphine Oxides, Established from Powder X-ray Diffraction
Gin Keat Lim, Zhongfu Zhou, Kotaro Fujii, Patrizia Calcagno, Emilio Tedesco, Simon J. Kitchin, Benson M. Kariuki, Douglas Philp, Kenneth D. M Harris
Cryst. Growth Des., 2010, 10(8), 3814-3818.https://doi.org/10.1021/cg100715v
A Solid-State Dehydration Process in an Organic Material Associated with Substantial Hydrogen-Bond Reorganization, Investigated by Powder X-ray Diffraction
Javier Marti-Rujas, Anabel Morte-Rodenas, Fang Guo, Nigel Thomas, Kotaro Fujii, Benson M. Kariuki, Kenneth D. M Harris
Cryst. Growth Des., 2010, 10(7), 3176-3181.https://doi.org/10.1021/cg100330c
Selective transformation pathways between crystalline forms of an organic material established from powder X-ray diffraction analysis
Kotaro Fujii, Yasunari Ashida, Hidehiro Uekusa, Fang Guo, Kenneth D. M. Harris
Chem. Comm., 2010, 46(24), 4264-4266.https://doi.org/10.1039/c0cc00233j
Hexaradialenes by Successive Ring Openings of Tris(alkoxytricyclobutabenzenes):Synthesis and Characterization
Shinya Shinozaki, Toshiyuki Hamura, Yousuke Ibusuki, Kotaro Fujii, Hidehiro Uekusa, Keisuke Suzuki
Angew. Chem. Int. Ed., 2010, 49(17), 3026-3029.https://doi.org/10.1002/anie.200907305
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
Kotaro Fujii, Hidehiro Uekusa, Naoko Itoda, Gen Hasegawa, Etsuo Yonemochi, Katsuhide Terada, Zhigang Pan, Kenneth D. M. Harris
J. Phys. Chem. C, 2010, 114(1), 580-586.https://doi.org/10.1021/jp908636t
Partial ferromagnetic ordering and indirect exchange interaction in the spatially anisotropic kagome antiferromagnet Cs2Cu3CeF12
T. Amemiya, M. Yano, K. Morita, I. Umegaki, T. Ono, H. Tanaka, K. Fujii, H Uekusa
Phys. Rev. B: Condens. Matter, 2009, 80(10), 100406/1-100406/4.https://doi.org/10.1103/PhysRevB.80.100406
Magnetic susceptibilities in a family of S= 1/2 kagome antiferromagnets
T. Ono, K. Morita, M. Yano, H. Tanaka, K. Fujii, H. Uekusa, Y. Narumi, and K. Kindo
Phys. Rev. B: Condens. Matter, 2009, 79(17), 174407/1-11.https://doi.org/10.1103/PhysRevB.79.174407
Dihydrochalcone Designed from Methylophiopogonanone B Strongly Inhibits Hypoxia-inducible Factor (HIF)-1α Activity
Mikio Fujii, Kiyoshi Egawa, Yasuaki Hirai, Masato Kondo, Kotaro Fujii, Hidehiro Uekusa, Hiroyuki Akita, Kiyoshi Nose, Kazuo Toriizuka, Yoshiteru Ida
Heterocycles, 2009, 78(8), 2061 - 2065.https://doi.org/10.3987/COM-09-11684
Chiral Tetraazamacrocycles Having Four Pendant-Arms
Seiji Kamioka, Takashi Takahashi, Susumu Kawauchi, Hiroaki Adachi, Yusuke Mori, Kotaro Fujii, Hidehiro Uekusa, Takayuki Doi
Org. Lett., 2009, 11(11), 2289-2292.https://doi.org/10.1021/ol9005954
Performance of the micro-PIC gaseous area detector in small-angle X-ray scattering experiments
Kaori Hattori, Ken-ichi Tsuchiya, Kazuki Ito, Yoko Okada, Kotaro Fujii, Hidetoshi Kubo, Kentaro Miuchi, Masaki Takata, Toru Tanimori, Hidehiro Uekusa
J. Synchrotron Radiat., 2009, 16(2), 231-236.https://doi.org/10.1107/S0909049508041071
Vapour Induced Crystalline Transformation Investigated by ab initio Powder X-ray Diffraction Analysis
Kotaro Fujii, Yasunari Ashida, Hidehiro Uekusa, Shinya Hirano, Shinji Toyota, Fumio Toda, Zhigang Pan, Kenneth D.M. Harris
Cryst. Growth Des., 2009, 9(2), 1201-1207.https://doi.org/10.1021/cg801142p
Reevaluation of solubility of tolbutamide and polymorphic transformation from Form I to unknown crystal form
Gen Hasegawa, Takao Komasaka, Rui Bando, Yasuo Yoshihashi, Etsuo Yonemochi, Kotaro Fujii, Hidehiro Uekusa, Katsuhide Terada
Int. J. Pharm., 2009, 369(1-2), 12-18.https://doi.org/10.1016/j.ijpharm.2008.10.018
Single-crystal-to-single-crystal photocyclization of 4-(2,4,6-triisopropylbenzoyl)benzoic acid in the salt crystal with (S)-phenylethylamine
Hideko Koshima, Yuya Ide, Michitaro Fukano, Kotaro Fujii, Hidehiro Uekusa
Tetrahedron Lett., 2008, 49(28), 4346-4348.https://doi.org/10.1016/j.tetlet.2008.05.041
Singlet Ground State and Spin Gap in S = 1/2 Kagome Antiferromagnet Rb2Cu3SnF12
Katsuhiro Morita, Midori Yano, Toshio Ono, Hidekazu Tanaka, Kotaro Fujii, Hidehiro Uekusa, Yasuo Narumi, and Koichi Kindo
J. Phys. Soc. Jpn., 2008, 77(4), 04370/1-4.https://doi.org/10.1143/JPSJ.77.043707
Solid-State Phase Transition of an Inclusion Complex of 5-Methyl-2-pyridone with 1,3,5-Benzenetricarboxylic Acid
Shinya Hirano, Shinji Toyota, Fumio Toda, Kotaro Fujii, Hidehiro Uekusa
Angew. Chem. Int. Ed., 2006, 45(36), 6013-6016.https://doi.org/10.1002/anie.200600845
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
Masakazu Nishida , Haruhiko Fukaya, Yoshio Hayakawa, Taizo Ono, Kotaro Fujii, Hidehiro Uekusa
Helv. Chim. Acta, 2006, 89(11), 2671-2685.https://doi.org/10.1002/hlca.200690239