2009年
Original Papers
Organic-solvent/water/ionic-liquid triphasic system for the fractional extraction of divalent metal cations
Takeshi Takata and Naoki Hirayama
Analytical Sciences, 2009, 25, 1269-1270
doi:10.2116/analsci.25.1269
(Selected as Hot Articles)
Cooperative intramolecular interaction of diazacrown ether bearing β-diketone fragments on an ionic liquid extraction system
Kojiro Shimojo, Hiroyuki Okamura, Naoki Hirayama, Shigeo Umetani, Hisanori Imura and Hirochika Naganawa
Dalton Transactions, 2009, 4850-4852
doi:10.1039/b904596c
Books
図解 最先端イオン交換技術のすべて
平山直紀 他 (日本イオン交換学会 編)
工業調査会, 2009
担当分: 152-155
2008年
Original Papers
イオン液体キレート抽出系における金属イオンの抽出挙動
平山直紀
分析化学, 2008, 57, 949-959
doi:10.2116/bunsekikagaku.57.949
Extraction behavior of divalent metal cations in ionic liquid chelate extraction systems using 1-alkyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imides and thenoyltrifluoroacetone
Keiji Kidani, Naoki Hirayama and Hisanori Imura
Analytical Sciences, 2008, 24, 1251-1254
doi:10.2116/analsci.24.1251
Ionic liquid synergistic cation-exchange system for the selective extraction of lanthanum(III) using 2-thenoyltrifluoroacetone and 18-crown-6
Naoki Hirayama, Hiroyuki Okamura, Keiji Kidani and Hisanori Imura
Analytical Sciences, 2008, 24, 697-699
doi:10.2116/analsci.24.697
Use of 8-sulfonamidoquinoline derivatives as chelate extraction reagents in ionic liquid extraction system
Taku Ajioka, Syunichi Oshima and Naoki Hirayama
Talanta, 2008, 74, 903-908
doi:10.1016/j.talanta.2007.07.020
2007年
Original Papers
Effect of eluent countercation on anion-chromatographic retention of aromatic dianions
Takuro Takeshita and Naoki Hirayama
Journal of Ion Exchange, 2007, 18, 502-505
doi:10.5182/jaie.18.502
Extraction behavior of copper(II) cation using sulfonamide-type polyanionic chelators having ethylene bridges
Chikako Kato, Naoki Hirayama and Syunichi Oshima
Journal of Ion Exchange, 2007, 18, 408-409
doi:10.5182/jaie.18.408
Peculiar extraction behavior of nickel(II) originated in steric effect of Schiff base ligands in ion-pair extraction systems
Syunichi Oshima, Koji Kubono, Hisao Kokusen, Yu Komatsu and Naoki Hirayama
Journal of Ion Exchange, 2007, 18, 364-369
doi:10.5182/jaie.18.364
Solvent extraction of alkaline earth metal ions using N,N’-bis(2-hydroxy-5-nitrophenylmethyl)-N,N’-bis(2-pyridylmethyl)-1,2-ethanediamine
Syunichi Oshima, Naoki Hirayama, Koji Kubono and Hisao Kokusen
Journal of Ion Exchange, 2007, 18, 360-363
doi:10.5182/jaie.18.360
Sulfonamide-type monoanionic bidentate ligands as possible chelate extractant for copper(II) cation
Chikako Kato, Noriko Sugisaka, Eri Hirasawa, Syunichi Oshima and Naoki Hirayama
Solvent Extraction Research and Development, Japan, 2007, 14, 171-176
Link to Journal Web Site
2006年
Original Papers
Bis[2,4-dichloro-6-(piperidin-1-ylmethyl)phenolato-κ2N,O]copper(II)
Koji Kubono, Syunichi Oshima, Naoki Hirayama and Kunihiko Yokoi
Acta Crystallographica Section E, 2006, 62, m2858-m2859
doi:10.1107/S1600536806040207
The behavior of divalent transition metal cations on extraction into 1-butyl-3-methylimidazolium hexafluorophosphate room temperature ionic liquid with β-diketones having a trifluoromethyl group
Naoki Hirayama, Mika Deguchi and Takaharu Honjo
Solvent Extraction Research and Development, Japan, 2006, 13, 83-88
Link to Journal Web Site
Halogen-free water-immiscible ionic liquids based on tetraoctylammonium cation and dodecylsulfate and dodecylbenzenesulfonate anions, and their application as chelate extraction solvent
Toshihide Tsukatani, Hajime Katano, Hirosuke Tatsumi, Mika Deguchi and Naoki Hirayama
Analytical Sciences, 2006, 22, 199-200
doi:10.2116/analsci.22.199
Reviews
イオン液体を抽出相とする金属イオンの溶媒抽出
平山直紀
ぶんせき, 2006, 519-523
クラウンエーテル結合イオン液体による金属イオンの抽出
平山直紀
ぶんせき, 2006, 451
イオン液体と中性配位子を用いる金属イオンの抽出機構
平山直紀
ぶんせき, 2006, 274
2005年
Original Papers
2,4-Dichloro-6-(piperidin-1-ylmethyl)phenol
Koji Kubono, Syunichi Oshima, Naoki Hirayama and Kunihiko Yokoi
Acta Crystallographica Section E, 2005, 61, o3706-o3708
doi:10.1107/S1600536805032290
Extraction behavior of silver(I) with thenoyltrifluoroacetone and a thiacrownether
Susumu Ogawa, Naoki Hirayama, Takaharu Honjo and Kenji Chayama
Solvent Extraction Research and Development, Japan, 2005, 12, 77-83
Link to Journal Web Site
Use of 1-alkyl-3-methylimidazolium hexafluorophosphate room temperature ionic liquids as chelate extraction solvent with 4,4,4-trifluoro-1-(2-thienyl)-1,3-butanedione
Naoki Hirayama, Mika Deguchi, Hitomi Kawasumi and Takaharu Honjo
Talanta, 2005, 65, 255-260
doi:10.1016/j.talanta.2004.06.015