A Ferromagnetic Chain of Imidazolato-Bridged One-Dimensional Copper(II) Complex

作者：Yoshida Tetsuya; Towatari Masaaki; Sato Tetsuya; Matsumoto Naohide^*; Re Nazzareno; Mrozinski Jerzy

来源：Bulletin of the Chemical Society of Japan, 2009, 82(4): 467-471.

DOI：10.1246/bcsj.82.467

A mononuclear copper(II) complex, [2-ethoxy-6-{[3-(2-methyl-4-imidazolylmethyleneamino)propyl]iminomethyl}-phenolato]copper(II) perchlorate [CuHL]ClO4 and its deprotonated complex at the imidazole moiety, [CuL](n), were prepared. The structure of [CuHL]ClO4 Consists of a cation [CuHL]( ) exhibiting a four-coordinated square-planar geometry and an anion ClO4-, while [CuL](n) assumes an imidazolato-bridged zigzag-chain structure, in which the copper(II) ion is coordinated by the imidazolato nitrogen atom of the adjacent Molecule with Cu-N = 2.258(5) A and the two adjacent CuL units assumes a perpendicular orientation. The temperature-dependent magnetic susceptibilities from 2.0 to 300K and field-dependent magnetization at 2.0 K demonstrate that [CuHL]ClO4 is a magnetically isolated copper(II) molecule while [CuL](n) is a ferromagnetic chain. The magnetic susceptibility data of [CuL](n) were analyzed by Baker's model based on H = -2J Sigma SAjSAj 1 for chain of equally spaced copper(II) ions to give the best-fit parameters of g = 2.08 and J = 0.63 cm(-1).

• 出版日期2009-4-15