下線：研究室メンバー

94.
“Experimental observation of two features unexpected from the classical theories of rubber elasticity”
K. Nishi, K. Fujii, U.-i. Chung, M. Shibayama, and T. Sakai
Phys. Rev. Lett., 119, 267801 (2017).

93.
“Ion-solvation structure and battery electrode characteristics of nonflammable organic electrolytes based on tris(trifluoroethyl)phosphate dissolving lithium salts”
Y. M. Todorov, K. Fujii, N. Yoshimoto, D. Hirayama, M. Aoki, H. Mimura, and M. Morita
Phys. Chem. Chem. Phys., 19, 31085-31093 (2017).

92.
“Defect-free network formation and swelling behavior in ionic liquid-based electrolytes of tetra-arm polymers synthesized using a Micheal addition reaction”
M. Yoshitake, Y. Kamiyama, K. Nishi, N. Yoshimoto, M. Morita, T. Sakai, and K. Fujii*
Phys. Chem. Chem. Phys., 19, 29984-29990 (2017).

91.
“Solvation state of sodium tetraphenylborate in 3-methylpyridine and its aqueous solutions”
K. Sadakane, K. Fujii, S. Tsuzuki, H. Watanabe, and Y. Umebayashi.
J. Mol. Liquids, 248, 53-59 (2017).

90.
“Long-Range Ion-Ordering in Salt-Concentrated Lithium-Ion Battery Electrolytes: A Combined High-Energy X-ray Total Scattering and Molecular Dynamics Simulation Study”
K. Fujii*, M. Matsugami, K. Ueno, K. Ohara, M. Sogawa, T. Utsunomiya, and M. Morita.
J. Phys. Chem. C, 121, 22720-22726 (2017).

89.
“Solvated Structure of Cellulose in a Phosphonate-Based Ionic Liquid”
K. Hirosawa, K. Fujii*, K. Hashimoto, and M. Shibayama.
Macromolecules, 50, 6509-6517 (2017).

88.
“Role of Solvent Bulkiness on Lithium-Ion Solvation in Fluorinated Alkyl Phosphate-Based Electrolytes: Structural Study for Designing Nonflammable Lithium-Ion Batteries”
M. Sogawa, Y. M. Todorov, D. Hirayama, H. Mimura, N. Yoshimoto, M. Morita, and K. Fujii*
J. Phys. Chem. C, 121, 19112-19119 (2017).

87.
“Steric effect on Li+ coordination and transport properties in polyoxetane-based polymer electrolytes bearing nitrile groups”
R. Sai, K. Ueno, K. Fujii, Y. Nakano, and H. Tsutsumi.
RSC Adv., 7, 37975-37982 (2017).

86.
“Microscopic Structure of Solvated Poly(benzyl methacrylate) in an Imidazolium-Based Ionic Liquid: High-Energy X-ray Total Scattering and All-Atom MD Simulation Study”
K. Fujii*, T. Ueki, K. Hashimoto, Y. Kobayashi, Y. Kitazawa, K. Hirosawa, M. Matsugami, K. Ohara, M. Watanabe, and M. Shibayama.
Macromolecules, 50, 4780-4786 (2017).

85.
“Hydrogen bonding in protic and aprotic amide mixtures: low-frequency Raman spectroscopy, small-angle neutron scattering, and molecular dynamics simulations”
K. Fujii*, M. Yoshitake, H. Watanabe, T. Takamuku, and Y. Umebayashi.
J. Mol. Liquids, 238, 518-522 (2017).

84.
“Effect of protonation on the solvation structure of solute N-butylamine in an aprotic ionic liquid”
K. Hashimoto, K. Fujii (co-first)*, K. Ohara, and M. Shibayama.
Phys. Chem. Chem. Phys., 19, 8194-8200 (2017).

83.
“Role of polar side chains in Li+ coordination and transport properties of polyoxetane-based polymer electrolytes”
R. Sai, K. Ueno, K. Fujii, Y. Nakano, N. Shigaki, and H. Tsutsumi.
Phys. Chem. Chem. Phys., 19, 5185-5194 (2017).

82.
“Pressure Response of a Thermo-Responsive Polymer in an Ionic Liquid”
K. Hirosawa, K. Fujii*, T. Ueki, Y. Kitazawa, M. Watanabe, and M. Shibayama.
Macromolecules, 49, 8249-8253 (2016).

81.
“Thermal and electrochemical properties of nonflammable electrolyte solutions containing fluorinated alkylphosphates for lithium-ion batteries”
Y. M. Todorov, M. Aoki, H. Mimura, K. Fujii, N. Yoshimoto, and M. Morita.
J. Power Sources, 332, 322-329 (2016).

80.
“Structural and Electrochemical Properties of Li Ion Solvation Complexes in the Salt-Concentrated Electrolytes Using an Aprotic Donor Solvent, N,N-Dimethylformamide”
K. Fujii*, H. Wakamatsu, Y. Todorov. N. Yoshimoto, and M. Morita.
J. Phys. Chem. C, 120, 17196-17204 (2016).

79.
“SANS study on solvated structure and molecular interactions of a thermo-responsive polymer in a room-temperature ionic liquid”
K. Hirosawa, K. Fujii*, T. Ueki, Y. Kitazawa, K. C. Littell, M. Watanabe, and M. Shibayama.
Phys. Chem. Chem. Phys., 18, 17881-17889 (2016).

78.
“Raman Spectroscopic Speciation Analyses and Liquid Structures by High-Energy X-ray Total Scattering and Molecular Dynamics Simulations for N-Methylimidazolium Based Protic Ionic Liquids”
H. Watanabe, H. Doi, S. Saito, K. Sadakane, K. Fujii, R. Kanzaki, Y. Kameda, and Y. Umebayashi.
Bull. Chem. Soc. Jpn., 89, 965-972 (2016).

77.
“Degradation Characteristics of Electric Double-layer Capacitors Consisting of High Specific Surface Aria Carbon Electrodes with Organic Electrolyte Solutions”
M. Tokita, N. Yoshimoto, K. Fujii, and M. Morita.
Electrochim. Acta, 209, 210-218 (2016).

76.
“Nearly Ideal Polymer Network Ion Gel Prepared in pH-buffering Ionic Liquid”
K. Hashimoto, K. Fujii (co-first)*, K. Nishi, T. Sakai, and M. Shibayama.
Macromolecules, 49, 344-352 (2016).

75.
“Influences of Residual Water in High Specific Surface Area Carbon on the Capacitor Perfotmances in an Organic Electrolyte Solution”
M. Morita, Y. Noguchi, M. Tokita, N. Yoshimoto, K. Fujii, and T. Utsunomiya.
Electrochim. Acta, 206, 427-431 (2016).

74.
“Hydrogen bond in imidazolium based protic and aprotic ionic liquids”
H. Watanabe, H. Doi, S. Saito, M. Matsugami, K. Fujii, R. Kanzaki, Y. Kameda, and Y. Umebayashi.
J. Mol. Liquids, 217, 35-42 (2016).

73.
“Local structure of Li+ in concentrated LiPF6-dimethyl carbonate solutions”
Y. Kameda, S. Saito, Y. Umebayashi, K. Fujii, Y. Amo, and T. Usuki.
J. Mol. Liquids, 217, 17-22 (2016).

72.
“Solvation of Magnesium ion in Triglyme-based Electrolyte Solutions”
T. Kimura, K. Fujii (co-first)*, Y. Sato, M. Morita, and N. Yoshimoto.
J. Phys. Chem. C, 119, 18911-18917 (2015).
Erratum: “Correction to “Solvation of Magnesium ion in Triglyme-based Electrolyte Solutions” J. Phys. Chem. C, 120, 3085 (2016).

71.
“次世代蓄電・発電デバイス電解液のスペシエーション分析: 分光熱力学 -イオン液体中のリチウムイオン溶媒和-”
梅林 泰宏, 藤井 健太, 齊藤 蒼思, 渡辺 日香里, 土井 寛之
分析化学, 64, 197-202 (2015).

70.
“Relationship between low-Q peak and long-range ordering of ionic liquids revealed by high-energy X-ray total scattering”
K. Fujii*, S. Kohara, and Y. Umebayashi
Phys. Chem. Chem. Phys., 17, 17838-17843 (2015).

69.
“Microscopic Solvation Structure of Glucose in 1-Ethyl-3-methylimidazolium Methylphosphonate Ionic Liquid”
K. Hirosawa, K. Fujii*, K. Hashimoto, Y. Umebayashi, and M. Shibayama.
J. Phys. Chem. B, 119, 6262-6270 (2015).

68.
“High-performance gel electrolytes with tetra-armed polymer network for Li ion batteries”
T. Hazama, K. Fujii*, T. Sakai, M. Aoki, H. Mimura, H. Eguchi, Y. Todorov, N. Yoshimoto, and M. Morita.
J. Power Sources, 286, 470-474 (2015).

67.
“Gelation Mechanism of Tetra-armed Poly(ethylene glycol) in Aprotic Ionic Liquid Containing Nonvolatile Proton Source, Protic Ionic Liquid”
K. Hashimoto, K. Fujii*, K. Nishi, T. Sakai, N. Yoshimoto, M. Morita, and M. Shibayama.
J. Phys. Chem. B, 119, 4795-4801 (2015).

66.
“Carbon Dioxide Separation Using a High-toughness Ion Gel with a Tetra-armed Network”
K. Fujii*, T. Makino, K. Hashimoto, M. Kanakubo, and M. Shibayama.
Chem. Lett., 44, 17-19 (2015).

65.
“High-Energy X-ray Diffraction and MD Simulation Study on the Ion-Ion Interactions in 1-Ethyl-3-methylimidazolium Bis(fluorosulfonyl)amide”
K. Fujii*, S. Seki, K. Ohara, Y. Kameda, H. Doi, S. Saito, and Y. Umebayashi.
J. Solution Chem., 43, 1655-1668 (2014).

64.
“Water-in-Ionic Liquid Microemulsion Formation in Solvent Mixture of Aprotic and Protic Imidazolium-based Ionic Liquids”
T. Kusano, K. Fujii*, K. Hashimoto, and M. Shibayama.
Langmuir, 30, 11890-11896 (2014).

63.
“Kinetic Aspect on Gelation Mechanism of Tetra-PEG Hydrogel”
K. Nishi, K. Fujii*, Y. Katsumoto, T. Sakai, and M. Shibayama.
Macromolecules, 47, 3274-3281 (2014).

62.
“Small-Angle Neutron Scattering Study on Defect-Controlled Polymer Networks”
K. Nishi, H. Asai, K. Fujii, Y.-S. Han, T.-H. Kim, T. Sakai, and M. Shibayama.
Macromolecules, 47, 1801-1809 (2014).

61.
Acid-base property of protic ionic liquid, 1-alkylimidazolium bis(trifluoromethanesulfonyl)amide studied by potentiometric titration”
K. Hashimoto, K. Fujii*, and M. Shibayama
J. Mol. Liquids, 188, 143-147, (2013).

60.
“Small-Angle Neutron Scattering Study on Aggregation of 1-Alkyl-3-methylimidazolium-based Ionic Liquids in Aqueous Solution”
T. Kusano, K. Fujii*, M. Tabata, and M. Shibayama.
J. Solution Chem., 42, 1888-1901 (2013).

59.
“Unusual Li+ Ion Solvation Structure in Bis(fluorosulfonyl)amide Based Ionic Liquid.”
K. Fujii, H. Hamano, H. Doi, X. Song, S. Tsuzuki, K. Hayamizu, S. Seki, Y. Kameda, K. Dokko, M. Watanabe, and Y. Umebayashi.
J. Phys. Chem. C, 117, 19314-19324 (2013).

58.
“Brønsted Basicity of Solute Butylamine in an Aprotic Ionic Liquid Investigated by Potentiometric Titration”
K. Fujii*, K. Hashimoto, T. Sakai, Y. Umebayashi, and M. Shibayama.
Chem. Lett., 42, 1250-1251 (2013).

57.
“SANS and DLS Study of Tacticity Effects on Hydrophobicity and Phase Separation of Poly(N-isopropylacrylamide)”
K. Nishi, T. Hiroi, K. Hashimoto, K. Fujii, Y.-S. Han, T.-H Kim., Y. Katsumoto, and M. Shibayama.
Macromolecules, 46, 6225-6232 (2013).

56.
“Communication: Collective dynamics of room-temperature ionic liquids and their Li ion solutions studied by high-resolution inelastic X-ray scattering.”
K. Fujii*, M. Shibayama, T. Yamaguchi, K. Yoshida, T. Yamaguchi, S. Seki, H. Uchiyama, A. Q. R. Baron, and Y. Umebayashi.
J. Chem. Phys., 138, 151101 (2013).

55.
“Solvetion Structure of Poly(ethylene glycol) in Ionic Liquids Studied by High-energy X-ray Diffraction and Molecular Dynamics Simulations”
H. Asai, K. Fujii*, K. Nishi, T. Sakai, K. Ohara, Y. Umebayashi, and M. Shibayama.
Macromolecules, 46, 2369-2375 (2013).

54.
“Specific Solvation of Benzyl(methacrylate) in 1-Ethyl-3-methylimidazolium Bis(trifluoromethanesulfonyl)amide Ionic Liquid”
M. Matsugami, K. Fujii*, T. Ueki, Y. Umebayashi, M. Watanabe, and M. Shibayama.
Anal. Sci., 29, 311-314 (2013).

53.
“Structural Study on the UCST-Type Phase Separation of Poly(N-isopropylacrylamide) in Ionic Liquid”
H. Asai, K. Fujii*, T. Ueki, S. Sawamura, Y. Nakamura, Y. Kitazawa, M. Watanabe, Y.-S. Han, T.-H. Kim, and M. Shibayama.
Macromolecules, 46, 1101-1106 (2013).

52.
“Gelation process of Tetra-PEG ion-gel investigated by time-resolved dynamic light scattering”
H. Asai, K. Nishi, T. Hiroi, K. Fujii, T. Sakai, M. Shibayama.
Polymer, 54, 1160-1166 (2013).

51.
“Rubber elasticity for incomplete polymer networks”
K. Nishi, M. Chijiishi, Y. Katsumoto, T. Nakao, K. Fujii, U. Chung, H. Noguchi, T. Sakai, and M. Shibayama.
J. Chem. Phys., 137, 224903 (2012).

50.
“Relationship between mesoscale dynamics and shear relaxation of ionic liquids with long alkyl chain”
T. Yamaguchi, K. Mikawa, S. Koga, K. Fujii, H. Endo, M. Shibayama, H. Hamano, and Y. Umebayashi.
J. Chem. Phys., 137,104511 (2012).

49.
“Effect of Lithium Salts on Shear Relaxation Spectra of Pyrrolidinium-Based Ionic Liquids”
T. Yamaguchi, K. Mikawa, S. Koda, N. Serizawa, S. Seki, K. Fujii, and Y. Umebayashi.
J. Phys. Chem. B, 116, 7322-7327 (2012).

48.
“Structural Analysis of High Performance Ion Gel Comprising Tetra-PEG Network”
H. Asai, K. Fujii, T. Ueki, T. Sakai, M. Watanabe, and M. Shibayama.
Macromolecules, 45, 3902-3909 (2012).

47.
“Structural Heterogeneity and Unique Distorted Hydrogen Bonding in Primary Ammonium Nitrate Ionic Liquids Studied by High-energy X-ray Diffraction Experiments and MD Simulations”
X. Song, H. Hamano, B. Minofar, R. Kanzaki, K. Fujii, Y. Kameda, S. Kohara, M. Watanabe, S. Ishiguro, and Y. Umebayashi.
J. Phys. Chem. B, 116, 2801-2813 (2012).

46.
“Kinetic Study for AB type Coupling Reaction of Tetra-arm Polymers”
K. Nishi, K. Fujii*, M. Chijiishi, Y. Katsumoto, Y. Chung, T. Sakai, and M. Shibayama.
Macromolecules, 45, 1031-1036 (2012)., 45, 1031-1036 (2012).

45.
“High-performance Ion Gel with Tetra-PEG Network”
K. Fujii*, H. Asai, T. Ueki, M. Sakai, U. Chung, M. Watanabe, and M. Shibayama.
Soft Matter, 8, 1756-1759 (2012).

44.
”Experimental evidences for molecular origin of low-Q peak in neutron/x-ray scattering of 1-alkyl-3-methylimidazolium bis(trifluoromethanesulfonyl)amide ionic liquids”
K. Fujii, R. Kanzaki, T. Takamuku, Y. Kameda, S. Kohara, M. Kanakubo, M. Shibayama, S. Ishiguro and Y. Umebayashi.
J. Chem. Phys., 135, 244502 (2011).

43.
“Liquid Structure of and Li+ Ion Solvation in Bis(trifluoromethanesulfonyl)amide Based Ionic Liquids Composed of 1-Ethyl-3-methylimidazolium and N-Methyl-N-propylpyrrolidinium Cations”
Y. Umebayashi, H. Hamano, S. Seki, B. Minofar, K. Fujii, K. Hayamizu, S. Tsuzuki, Y. Kameda, S. Kohara, and M. Watanabe.
J. Phys. Chem. B, 115, 12179–12191 (2011).

42.
“Examination of the Theories of Rubber Elasticity Using an Ideal Polymer Network”
Y. Akagi, T. Katashima, Y. Katsumoto, K. Fujii, T. Matsunaga, U. Chung, M. Shibayama, and T. Sakai.
Macromolecules, 44, 5817-5821 (2011).

41.
“Structural aspects of the LCST phase behavior of poly(benzyl methacrylate) in room-temperature ionic liquid”
K. Fujii, T. Ueki, K. Niitsuma, T. Matsunaga, M. Watanabe and M. Shibayama.
Polymer, 52, 1589-1595 (2011).

40.
“Studies on the translational and rotational motions of ionic liquids composed of N-methyl-N-propyl-pyrrolidinium (P13) cation and bis(trifluoromethanesulfonyl)amide and bis(fluorosulfonyl)amide anions and their binary systems including lithium salts”
K. Hayamizu, S. Tsuzuki, S. Seki, K. Fujii, M. Suenaga and Y. Umebayashi.
J. Chem. Phys., 133, 194505 (2010).

39.
“Effects of the alkyl-chain length on the mixing state of imidazolium-based ionic liquid-methanol solutions”
T. Shimomura, K. Fujii, and T. Takamuku.
Phys. Chem. Chem. Phys., 12, 12316-12324 (2010).

38.
“Dependence of the Conformational Isomerism in 1-N-Butyl-3-methylimidazolium Ionic Liquids on the Nature of the Halide Anion”
Y. Umebayashi, H. Hamano, S. Tsuzuki, J. N. C. Lopes, A. A. H. Pádua, Y. Kameda, S. Kohara, T. Yamaguchi, K. Fujii, and S. Ishiguro.
J. Phys. Chem. B, 114, 11715-11724 (2010).

37.
“Structure, Solvation and Acid-Base Property in Ionic Liquids”
S. Ishiguro, Y. Umebayashi, R. Kanzaki, and K. Fujii.
Pure Appl. Chem., 82, 1927-1941 (2010).

36.
“Raman Spectroscopic Studies and Ab Initio Calculations on Conformational Isomerism of TFSA solvated to a Lithium Ion in Ionic Liquids: Effects of the Second Solvation Sphere of the Lithium Ion”
Y. Umebayashi, S. Tsuzuki, K. Fujii, S. Mori, S. Seki, K. Hayamizu and S. Ishiguro.
J. Phys. Chem. B, 114, 6513-6521 (2010).

35.
“Solvation of the Amphiphilic Diol Molecule in Aliphatic Alcohol-Water and Fluorinated Alcohol-Water Solutions”
T. Takamuku, M. Tanaka, T. Sako, T. Shimomura, K. Fujii, R. Kanzaki, and M. Takeuchi.
J. Phys. Chem. B, 114, 4252-4260 (2010).

34.
“Solvation and microscopic properties of ionic liquid/acetonitrile mixtures probed by high-pressure infrared spectroscopy.”
Y. Umebayashi, J.-C. Jiang, K.-H. Lin, Y.-L. Shan, K.-H Lin, K. Fujii, S. Seki, S. Ishiguro, S. H. Lin, and H.-C. Chang.
J. Chem. Phys., 131, 234502 (2009).

33.
“Ion-ion interaction in Room temperature ionic liquid 1-ethyl-3-methylimidazolium tetrafluoroborate studied by large-angle X-ray scattering experiment and molecular dynamics simulations”
R. Kanzaki, T. Mitsugi, S. Fukuda, K. Fujii, M. Takeuchi, Y. Soejima, T. Takamuku, T. Yamaguchi, Y. Umebayashi, and S. Ishiguro.
J. Mol. Liquids, 147, 77-82 (2009).

32.
“Effect of methylation at the C2 position on the liquid structure of ionic liquids revealed by large-angle X-ray scattering experiments and MD simulations”
K. Fujii, T. Mitsugi, T. Takamuku, T. Yamaguchi, Y. Umebayashi, and S. Ishiguro.
Chem. Lett., 38, 340-341 (2009).

31.
“Raman Spectroscopic Study, DFT calculations and MD Simulations on the Conformational Isomerism of N-Alkyl-N-methylpyrrolidinium Bis-(trifluoromethanesulfonyl) Amide Ionic Liquids”
Y. Umebayashi, T. Mitsugi, K. Fujii, S. Seki, K. Chiba, H. Yamamoto, J. N. C. Lopes, A. A. H. Pádua, M. Takeuchi, and S. Ishiguro.
J. Phys. Chem. B, 113, 4338-4346 (2009).

30.
“Structural Change of ionic association in ionic liquid/water mixtures: high pressure infrared spectroscopic study”
Y. Umebayashi, J.-C. Jiang, Y.-L. Shan, K.-H Lin, K. Fujii, S. Seki, S. Ishiguro, S. H. Lin, and H.-C. Chang.
J. Chem. Phys., 130, 124503 (2009).

29.
“Relationships between center atom species (N, P) and ionic conductivity, viscosity, density, self-diffusion coefficient of quaternary cation room-temperature ionic liquids”
S. Seki, K. Hayamizu, S. Tsuzuki, K. Fujii, Y. Umebayashi, T. Mitsugi, T. Kobayashi, Y. Ohno, Y. Kobayashi, Y. Mita, H. Miyashiro, and S. Ishiguro.
Phys. Chem. Chem. Phys., 11, 3509-3514 (2009).

28.
“Liquid Structure and the Ion-Ion Interactions of Ethylammonium Nitrate Ionic Liquid Studied by Large Angle X-ray Scattering and Molecular Dynimics Simulations”
Y. Umebayashi, W.-L. Chung, T. Mitsugi, S. Fukuda, M. Takeuchi, K. Fujii, T. Takamuku, R. Kanzaki, and S. Ishiguro.
J. Comput. Chem. Jpn., 7, 125-134 (2008).

27.
“Potential Energy Landscape of Bis(fluorosulfonyl)amide.”
J. N. C. Lopes, K. Shimizu, A. A. H. Pádua, Y. Umebayashi, S. Fukuda, K. Fujii, and S. Ishiguro.
J. Phys. Chem. B, 112, 9449-9455 (2008).

26.
“Solvation Structure of Some Transition Metal(II) ions in a Room Temperature Ionic Liquid, 1-Ethyl-3-methylimidazolium Bis(trifluoromethanesulfonyl)amide”
K. Fujii, T. Nonaka, Y. Akimoto, Y. Umebayashi, and S. Ishiguro.
Anal. Sci., 24, 1377-1380 (2008).

25.
“Raman Spectroscopic Study on Alkaline Metal Ions Solvation in 1-Butyl-3-methylimidazolium Bis-(trifluoromethanesulfonyl) Amide Ionic Liquid”
Y. Umebayashi, T. Yamaguchi, S. Fukuda, M. Takeuchi, K. Fujii, and S. Ishiguro.
Anal. Sci., 24, 1297-1304 (2008).

24.
“Solvation of Lithium Ion in N,N-diethyl-N- methyl-N-(2-methoxy-ethyl)ammonium Bis(trifluoromethanesulfonyl)imide Using Raman and Multinuclear NMR Spectroscopy”
A. Shirai, K. Fujii, Y. Umebayashi, S. Ishiguro, and Y. Ikeda.
Anal. Sci., 24, 1291-1296 (2008).

23.
“A Micro-solvent Cluster Extraction Using Aqueous Mixed Solvents of Ionic Liquid”
T. Charoenraks, M. Tabata, and K. Fujii.
Anal. Sci., 24, 1239-1244 (2008). Hot Articles

22.
“Aggregation of Imidazolium Ionic Liquids in Molecular Liquids Studied by Small-Angle Neutron Scattering and NMR”
T. Takamuku, Y. Honda, K. Fujii, and H. Kittaka.
Anal. Sci., 24, 1285-1290 (2008).

21.
“Liquid structure and conformation of a low-viscosity ionic liquid, N-methyl-N-propylpyrrolidinium bis(fluorosulfonyl) imide studied by high-energy X-ray scattering”
K. Fujii, S. Seki, S. Fukuda, T. Takamuku, S. Kohara, Y. Kameda, Y. Umebayashi, and S. Ishiguro.
J. Mol. Liquids, 143, 64-69, (2008).

20.
“Liquid structure of N-methyl-N-pyrrolidinium bis-(trifluoromethanesulfonyl) amide ionic liquid studied by large angle X-ray scattering and molecular dynamics simulations”
S. Fukuda, M. Takeuchi, K. Fujii, R. Kanzaki, T. Takamuku, K. Chiba, H. Yamamoto, Y. Umebayashi, and S. Ishiguro.
J. Mol. Liquids, 143, 2-7, (2008).

19.
“Liquid Structure of Room Temperature Ionic Liquid, 1-Ethyl-3-methylimidazolium Bis-(trifluoromethaneslufonyl) Imide”
K. Fujii, Y. Soejima, Y. Kyoshoin, S. Fukuda, R. Kanzaki, Y. Umebayashi, T. Yamaguchi, S. Ishiguro, and T. Takamuku.
J. Phys. Chem. B, 112, 4329-4336 (2008).

18.
“A Tale of Two Ions: the conformational landscapes bis(trifluoromethanesulfonyl) amide and N,N-dialkylpyrrolidinum”
J. N. C. Lopes, K. Shimizu, A. A. H. Padua, Y. Umebayashi, S. Fukuda, K. Fujii, and S. Ishiguro.
J. Phys. Chem. B, 112, 1465-1472 (2008).

17.
“Lithium-ion Solvation in Room Temperature Ionic Liquids Involving Bis-(trifluorosulfonyl) Imide Anion Studied by Raman Spectroscopy and DFT Calculations”
Y. Umebayashi, T. Mitsugi, S. Fukuda, T. Fujimori, K. Fujii, R. Kanzaki, M. Takeuchi, and S. Ishiguro.
J. Phys. Chem. B, 111, 13028-13032 (2007).

16.
“Anion Conformation of Low-viscosity Room-Temperature Ionic Liquid, 1-ethyl-3-methylimidazolium Bis(fluoroslufonyl) Imide“
K. Fujii, S. Seki, S. Fukuda, R. Kanzaki, T. Takamuku, Y. Umebayashi, and S. Ishiguro.
J. Phys. Chem. B, 111, 12829-12833 (2007).

15.
“Solvation Number and Conformation of N,N-Dimethylacrylamide and N,N-Dimethylpropionamide in the Coordination Sphere of the Cobalt(II) Ion in Solution Studied by FT-IR and FT-Raman spectroscopy.”
M. Asada, T. Mitsugi, T. Ogura, K. Fujii, Y. Umebayashi, and S. Ishiguro.
Anal. Sci., 23, 835-840 (2007).

14.
“Raman Spectroscopic Study and DFT Calculations on the Conformation of 5-azonia-spiro[4.4]nonane Cation in Crystal and Dimethyl Carbonate Solution”
T. Sukizaki, S. Fukuda, T. Yamaguchi, K. Fujii, R. Kanzaki, K. Chiba, H. Yamamoto, Y. Umebayashi, and S. Ishiguro.
Electrochemistry, 8, 628-634 (2007).

13.
“Vibrational spectroscopy and molecular orbital calculations of N,N-dimethylacrylamide and N,N-dimethylpropionamide –Conformational equilibrium in the liquid state–“
M. Asada, T. Mitsugi, K. Fujii, R. Kanzaki, Y. Umebayashi, and S. Ishiguro.
J. Mol. Liquids, 136, 138-146 (2007).

12.
“Solvation structure of magnesium, zinc, and alkaline earth metal ions in N,N-dimethylformamide, N,N-dimethylacetamide, and their mixtures studied by means of Raman spectroscopy and DFT calculations –Ionic size and electronic effects on steric congestion–”
M. Asada, T. Fujimori, K. Fujii, R. Kanzaki, Y. Umebayashi, and S. Ishiguro.
J. Raman Spec., 38, 417-426 (2007).

11.
“Conformational structure of room temperature ionic liquid N-buthyl-N-methyl-pyrrolidinium bis(trifluoromethanesulfonyl) imide –Raman spectroscopic study and DFT calculations–“
T. Fujimori, K. Fujii, R. Kanzaki, K. Chiba, H. Yamamoto, Y. Umebayashi, and S. Ishiguro.
J. Mol. Liquids, 131/132, 216-224 (2007).

10.
“Cobalt(II) Chloro Complexation in N,N-Dimethylformamide – N-Methylformamide Mixtures Studied by Titration Calorimetry and Spectrophotometry”
K. Fujii, Y. Matsumoto, Y. Kaieda, D. Kobayashi, Y. Umebayashi, and S. Ishiguro.
J. Therm. Anal. Cal., 85, 567-573 (2006).

9.
“Conformational equilibrium of bis(trifluoromethanesulfonyl) imide anion of a room-temperature ionic liquid –Raman spectroscopic study and DFT calculations–“
K. Fujii, R. Kanzaki, T. Takamuku, T. Fujimori, Y. Umebayashi, and S. Ishiguro.
J. Phys. Chem. B, 110, 8179-8183 (2006).

8.
“Liquid Structure and Preferential Solvation of Metal Ions in Solvent Mixtures of N,N-Dimethylformamide and N-Methylformamide”
K. Fujii, T. Kumai, T. Takamuku, Y. Umebayashi, and S. Ishiguro.
J. Phys. Chem. A, 110, 1798-1804 (2006).

7.
”Solvent conformation and ion solvation : From molecular to ionic liquids”
S. Ishiguro, Y. Umebayashi, K. Fujii, and R. Kanzaki.
Pure Appl. Chem., 78, 1595-1609 (2006).

6.
“Solvation Structure and Complexation of the Manganese(II) Ion in N,N-Dimethylpropionamide and N,N,N’,N’-Tetramethylurea Studied by means of Titration Calorimetry and Raman Spectroscopy”
Y. Zhang, N. Watanabe, Y. Miyawaki, Y. Mune, K. Fujii, Y. Umebayashi, and S. Ishiguro.
J. Solution Chem., 34, 1429-1443 (2005).

5.
“Evidence of Conformation Equilibrium of 1-Ethyl-3-methylimidazolium in Its Ionic Liquid Salts: Raman Spectroscopic Study and Quantum Chemical Caluclations”
Y. Umebayashi, T. Fujimori, T. Sukizaki, M. Asada, K. Fujii, R. Kanzaki, and S. Ishiguro.
J. Phys. Chem. A, 109, 8976-8992 (2005).

4.
“Thermodynamic Aspect on Metal-Ion Complexation in Structured Solvent N-Methylformamide”
K. Fujii, Y. Umebayashi, R. Kanzaki, D. Kobayashi, R. Matsuura, and S. Ishiguro.
J. Solution Chem., 34, 739-752 (2005).

3.
“Conformation of Solvent N,N-Dimethylpropionamide in the Coordination Sphere of the Zinc(II) Ion Studied by Raman Spectroscopy and DFT Calculations.”
Y. Umebayashi, B. Mroz, M. Asada, K. Fujii, K. Matsumoto, Y. Mune, M. Probst, and S. Ishiguro.
J. Phys. Chem. A, 109, 4862-4868 (2005).

2.
“Calorimetric study on complexation of copper(II) ion with some amide solvents in acetonitrile”
K. Fujii, T. Endoh, M. Yokoi, Y. Umebayashi, and S. Ishiguro.
Thermochimica Acta, 431, 29-32 (2005).

1.
“Propiononitrile as an Extraction Solvent for the Ion-Pair Complexes of Water-Soluble Tetracationic Porphyrinatocopper(II) with Perchlorate: The Effect of Sodium Chloride”
K. Fujii, J. Nishimoto, S. Yamada, M. Fukamachi, and M. Tabata.
Bull. Chem. Soc. Jpn., 77, 551-517 (2004).