M
Masayuki Koikawa
Researcher at Kyushu University
Publications - 9
Citations - 839
Masayuki Koikawa is an academic researcher from Kyushu University. The author has contributed to research in topics: Ligand & Copper. The author has an hindex of 6, co-authored 9 publications receiving 827 citations.
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Journal ArticleDOI
Design of metal-complex magnets. Syntheses and magnetic properties of mixed-metal assemblies {NBu4[MCr(ox)3]}x (NBu4+ = tetra(n-butyl)ammonium ion; ox2- = oxalate ion; M = Mn2+, Fe2+, Co2+, Ni2+, Cu2+, Zn2+)
Hiroko Tamaki,Zhuang J. Zhong,Naohide Matsumoto,Sigeo Kida,Masayuki Koikawa,Norio Achiwa,Yuzo Hashimoto,Hisashi Okawa +7 more
TL;DR: The reaction of K 3 [Cr(ox) 3 ].3H 2 O, a metal(II) salt, and tetra(n-butyl)ammonium bromide in the molar ratio of 1:1:1.5 in water at room temperature afforded a series of mixed-metal assemblies with the formula {NBu 4 [MCr(ox), 3 ]} x (M=Mn 2+, Fe 2+, Co 2+
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Binuclear copper(II) complexes bridged by oxamidate and dithio-oxamidate groups. Synthesis, structure, and magnetism
TL;DR: In this article, single-crystal X-ray analysis for [Cu2(bipy)2(oxd)][ClO4]2·2dmf (dmf = dimethylformamide) reveals that the oxd2− ion in trans conformation bridges two copper(II) ions with an intermetal distance of 5.192(2)A.
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Template synthesis, structure and characterization of NiII2PbII and CuII2PbII complexes of macrocycles with a N4O2 donor set
TL;DR: In this paper, the macrocyclic complexes [Pb(MLm,n)2]X2[H2Lm, n= macrocycle formed by the condensation of two molecules of 2,6-diformyl-4-methylphenol and two diamines H2N(CH2)mNH2 and H2NH2nNH2; m= 2 or 3 and n= 2-5; M = Cu or Ni; X = CIO4, PF6, BPh4 or BF4;
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Synthesis, structure, and redox properties of dicopper(II,II) complexes of N-(2-hydroxyphenyl)salicylamide and homologues. Facile oxidation to dicopper-(II,III) and -(III,III) species; crystal structure of bis(tetrabutylphosphonium) bis{[(2-oxidobenzoyl)(2′-oxidophenyl)amido(3–)-NO2,µ-O2′]cuprate(II)}
TL;DR: In this paper, the structure of the dicopper(II,III) species of the L2 complex was solved by single-crystal X-ray crystallography, which demonstrated that two copper ions are bridged by the phenolic oxygen of the ‘aminophenol’ moiety with a Cu ⋯ Cu separation of 3.035(2)A.