Publications

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., (査読あり) in press(), , ().

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., (査読あり) in press(), , ().

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., (査読あり) in press(), , ().

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, (査読あり) 121(39), 2172-21280, (2017).

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
Chemistry Letters, (査読あり) 46(6), 795-797, (2017).

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., (査読あり) 46(7), 2370-2376, (2017).

Hydrothermal Synthesis, Crystal Structure, and Superconductivity of a Double-Perovskite Bi Oxide
Mirza H. K. Rubel, Takahiro Takei, 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., (査読あり) 28(2), 459–465, (2016).

Improved oxide-ion conductivity of NdBaInO4 by Sr doping
Kotaro Fujii, Masahiro Shiraiwa, Yuichi Esaki, Masatomo Yashima, Su Jae Kim, Seongsu Lee
J. Mater. Chem. A, (査読あり) 3(22), 11985-11990, (2015).

Structure Determination from Powder X-ray Diffraction Data of Black Azo (Hydrazone) Pigments
Junji Otani, Michio Matsumura, Kotaro Fujii, Hidehiro Uekusa
Chem. Lett., (査読あり) 44(5), 662-664, (2015).

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., (査読あり) 54(8), 3896-3904, (2015).

新しい層状構造を有する酸化物イオン伝導体の発見
八島正知, 藤井孝太郎
パリティ, (査読あり) 30(1), 19-21, (2015).

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. Mat. Chem. A, (査読あり) 2(43), 18353-18359, (2014).

酸化物イオン伝導体の新構造ファミリーNdBaInO4を発見
藤井孝太郎, 八島正知
パリティ, (査読あり) 29(9), 35-39, (2014).

新構造ファミリーの酸化物イオン伝導性材料を発見
藤井 孝太郎,八島 正知
セラミックス, (査読あり) 49(7), 615, (2014).

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. Mat., (査読あり) 26(8), 2488-2491, (2014).

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, (査読あり) 118(10), 5180-5187, (2014).

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, (査読あり) 15(23), 4667-4675, (2013).

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., (査読あり) 15(18), 6779-6782, (2013).

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
Crystal Growth & Design, (査読あり) 13(5), 2060–2066, (2013).

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., (査読あり) 52(7), 3772-3779, (2013).

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
Crystal Growth & Design, (査読あり) 12(12), 6165-6172, (2012).

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., (査読あり) 422(1-2), 160-169, (2012).

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., (査読あり) 48(60), 7477-7479, (2012).

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
Crystal Growth & Design, (査読あり) 11(12), 5192-5199, (2011).

Reversible Color Switching of an Organic Crystal Induced by Organic Solvent Vapors
Kotaro Fujii, Aya Sakon, Akiko Sekine, Hidehiro Uekusa
Crystal Growth & Design, (査読あり) 11(10), 4305-4308, (2011).

連載企画 有機粉末構造解析をはじめよう! 「試料準備から測定まで」
藤井 孝太郎、植草 秀裕
日本結晶学会誌, (査読あり) 53(3), 170-177, (2011).

連載企画 有機粉末構造解析をはじめよう! 「粉末未知結晶構造解析の紹介」
植草 秀裕、藤井 孝太郎
日本結晶学会誌, (査読あり) 53(3), 163-170, (2011).

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., (査読あり) 11(9), 3725-3730, (2011).

Supramolecular Networks in Crystalline Inclusion Complexes Formed from a New Host: 2,2-Bis, 4-hydroxy-3-phenylphenyl-1H-indene-1,3, 2H-dione
Kenta Kasugai, Suzumi Hashimoto, Kazunori Imai, Aya Sakon, Kotaro Fujii, Hidehiro Uekusa, Naoto Hayashi, Keiji Kobayashi
Cryst. Growth & Des., (査読あり) 11(9), 4044-4052, (2011).

Structural Chemistry of a New Chiral Anhydrous Phase of Ru, bipy3, 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., (査読あり) 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
Hiroyuki Yamada, Katsuhiko Masuda, Takayuki Ishige, Kotaro Fujii, Hidehiro Uekusa, Keiko Miura, Etsuo Yonemochi, Katsuhide Terada
Journal of Pharmaceutical and Biomedical Analysis, (査読あり) 56(2), 448-453, (2011).

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., (査読あり) 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
Kotaro Fujii, Hidehiro Uekusa, Michitaro Fukano,Hideko Koshima
CrystEngComm, (査読あり) 13(3), 3197-3201, (2011).

粉末結晶解析を用いた溶媒蒸気による多形転移現象の解析
藤井孝太郎、植草 秀裕
化学工業, (査読あり) 64(4), 262-268, (2011).

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, (査読あり) 13(3), 731-733, (2011).

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., (査読あり) 59(1), 57-62, (2011).

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 Journal of Pharmaceutical and Clinical Research, (査読あり) 3(4), 26-29, (2010).

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., (査読あり) 46(40), 7572-7574, (2010).

Potassium clavulanate
Kotaro Fujii, Kazuyuki Toyota, Akiko Sekine, Hidehiro Uekusa, Ilma Nugrahani, Sukmadjaja Asyarie, N. Sundani Soewandhi, Slamet Ibrahim
Acta Cryst., (査読あり) E66(8), m985-m986, (2010).

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., (査読あり) 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
Javier Marti-Rujas, Anabel Morte-Rodenas, Fang Guo, Nigel Thomas, Kotaro Fujii, Benson M. Kariuki, Kenneth D. M Harris
Cryst. Growth Des., (査読あり) 10(7), 3176-3181, (2010).

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. Commun., (査読あり) 46(24), 4264-4266, (2010).

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., (査読あり) 49(1), 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
Kotaro Fujii, Hidehiro Uekusa, Naoko Itoda, Gen Hasegawa, Etsuo Yonemochi, Katsuhide Terada, Zhigang Pan, Kenneth D. M. Harris
J. Phys. Chem. C, (査読あり) 114(1), 580-586, (2010).

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, (査読あり) 80(10), 100406/1-100406/4, (2009).

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, (査読あり) 78(8), 2061-2065, (2009).

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, K Kindo
Phys. Rev. B, (査読あり) 79(17), 174407/1-174407/11, (2009).

Chiral Tetraazamacrocycles Having Four Pendant-Arms
Seiji Kamioka, Takashi Takahashi, Susumu Kawauchi, Hiroaki Adachi, Yusuke Mori, Kotaro Fujii, Hidehiro Uekusa, Takayuki Doi
Org. Lett., (査読あり) 11(11), 2289-2292, (2009).

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. Synch. Rad., (査読あり) 16(2), 231-236, (2009).

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., (査読あり) 369(1-2), 12-18, (2009).

Vapor 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., (査読あり) 9(2), 1201-1207, (2009).

粉末X線結晶構造解析で解明する5-メチル-2-ピリドン共結晶の光反応性と転移現象
藤井 孝太郎, 植草 秀裕
日本結晶学会誌, (査読あり) 50(6), 335-340, (2008).

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, Koichi Kindo
J. Phys. Soc. Jpn., (査読あり) 77(4), 043707/1-043707/4, (2008).

Single-crystal-to-single-crystal photocyclization of 4-, 2,4,6-triisopropylbenzoylbenzoic acid in the salt crystal with , S-phenylethylamine.
Hideko Koshima, Yuya Ide, Michitaro Fukano, Kotaro Fujii, Hidehiro Uekusa
Tetrahedron Lett., (査読あり) 49(28), 4346-4348, (2008).

粉末X線回折データを用いる有機化合物の結晶構造解析
津江 広人,堀口 雅弘,田村 類,藤井 孝太郎,植草 秀裕
有機合成化学協会誌, (査読あり) 65(12), 1203-1212, (2007).

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, (査読あり) 89(11), 2671-2685, (2006).

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 Uekuasa
Angew. Chem. Int. Ed., (査読あり) 45(36), 6013-6016, (2006).