| 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 N Hirayama, M Deguchi, H Kawasumi, T Honjo Talanta 65 (1), 255-260, 2005 | 167 | 2005 |
| Extraction behavior of divalent metal cations in ionic liquid chelate extraction systems using 1-alkyl-3-methylimidazolium bis (trifluoromethanesulfonyl) imides and … K Kidani, N Hirayama, H Imura Analytical Sciences 24 (10), 1251-1254, 2008 | 83 | 2008 |
| Use of 8-sulfonamidoquinoline derivatives as chelate extraction reagents in ionic liquid extraction system T Ajioka, S Oshima, N Hirayama Talanta 74 (4), 903-908, 2008 | 74 | 2008 |
| Ionic liquid synergistic cation-exchange system for the selective extraction of lanthanum (III) using 2-thenoyltrifluoroacetone and 18-crown-6 N Hirayama, H Okamura, K Kidani, H Imura Analytical Sciences 24 (6), 697, 2008 | 66 | 2008 |
| Synergistic effect of 18-crown-6 derivatives on chelate extraction of lanthanoids (III) into an ionic liquid with 2-thenoyltrifluoroacetone H Okamura, N Hirayama, K Morita, K Shimojo, H Naganawa, H Imura Analytical Sciences 26 (5), 607-611, 2010 | 63 | 2010 |
| Chelate extraction of metals into ionic liquids N Hirayama Solvent Extraction Research and Development, Japan 18, 1-14, 2011 | 53 | 2011 |
| Sulfonamide-type di-Schiff base ligands as chelate extraction reagents for divalent metal cations N Hirayama, J Taga, S Oshima, T Honjo Analytica Chimica Acta 466 (2), 295-301, 2002 | 50 | 2002 |
| Ion-pair extraction system for the mutual separation of lanthanides using divalent quadridentate Schiff bases N Hirayama, I Takeuchi, T Honjo, K Kubono, H Kokusen Analytical Chemistry 69 (23), 4814-4818, 1997 | 50 | 1997 |
| Structural control of Schiff base ligands for selective extraction of copper (II) S Oshima, N Hirayama, K Kubono, H Kokusen, T Honjo Analytical Sciences 18 (12), 1351-1356, 2002 | 48 | 2002 |
| Recent Progress in Ionic Liquid Extraction for the Separation of Rare Earth Elements H Okamura, N Hirayama Analytical Sciences 37 (1), 119-130, 2021 | 43 | 2021 |
| Ion chromatographic elution behaviour and prediction of the retention of inorganic monovalent anions using a phosphate eluent M Maruo, N Hirayama, T Kuwamoto Journal of Chromatography 481, 315-322, 1989 | 43 | 1989 |
| Selective extraction of gallium from aluminum and indium using tripod phenolic ligands N Hirayama, Y Horita, S Oshima, K Kubono, H Kokusen, T Honjo Talanta 53 (4), 857-862, 2001 | 41 | 2001 |
| Halogen-free water-immiscible ionic liquids based on tetraoctylammonium cation and dodecylsulfate and dodecylbenzenesulfonate anions, and their application as chelate … T Tsukatani, H Katano, H Tatsumi, M Deguchi, N Hirayama Analytical Sciences 22 (2), 199-200, 2006 | 40 | 2006 |
| Ion-pair extraction behavior of divalent transition metal cations as charged complexes with N,N′-bis(2-pyridylmethylidene)-1,2-diiminoethane and its analogues S Oshima, N Hirayama, K Kubono, H Kokusen, T Honjo Analytica Chimica Acta 441 (1), 157-164, 2001 | 40 | 2001 |
| Laser-induced fluorescence and infrared spectroscopic studies on the specific solvation of tris (1-(2-thienyl)-4, 4, 4-trifluoro-1, 3-butanedionato) europium (III) in an ionic … H Okamura, H Sakae, K Kidani, N Hirayama, N Aoyagi, T Saito, K Shimojo, ... Polyhedron 31 (1), 748-753, 2012 | 37 | 2012 |
| Ion-pair extraction behavior of divalent metal cations using neutral di-Schiff base ligands derived from 1, 2-cyclohexanediamine and o-phenylenediamine S Oshima, N Hirayama, K Kubono, H Kokusen, T Honjo Talanta 59 (5), 867-874, 2003 | 36 | 2003 |
| Grafting of phenylboronic acid on a glassy carbon electrode and its application as a reagentless glucose sensor K Morita, N Hirayama, H Imura, A Yamaguchi, N Teramae Journal of electroanalytical chemistry 656 (1-2), 192-197, 2011 | 30 | 2011 |
| Specific Cooperative Effect of a Macrocyclic Receptor for Metal Ion Transfer into an Ionic Liquid H Okamura, A Ikeda-Ohno, T Saito, N Aoyagi, H Naganawa, N Hirayama, ... Analytical Chemistry 84 (21), 9332-9339, 2012 | 28 | 2012 |
| Cooperative intramolecular interaction of diazacrown ether bearing β-diketone fragments on an ionic liquid extraction system K Shimojo, H Okamura, N Hirayama, S Umetani, H Imura, H Naganawa Dalton Transactions, 4850-4852, 2009 | 26 | 2009 |
| X-ray Crystallographic Approach to the Design of the Phenolic Schiff Base Reagents for the Mutual Separation of Lanthanoids K Kubono, N Hirayama, H Kokusen, K Yokoi Analytical Sciences 17 (1), 193-198, 2001 | 26 | 2001 |
