Magnetic behaviors after irradiation of assemblies consisting of bis(hexafluoroacetylacetonato)copper(II) and tetrapyridyl-pentadiazo compound in frozen solution

被引：10

作者：

Karasawa, S ^{[1
]}

Koga, N ^{[1
]}

机构：

[1] Kyushu Univ, Grad Sch Pharmaceut Sci, Higashi Ku, Fukuoka 8128582, Japan

来源：

POLYHEDRON | 2003年 / 22卷 / 14-17期

关键词：

carbenes; copper; assembly; spin-glass; magnetic properties; photolysis;

D O I：

10.1016/S0277-5387(03)00243-2

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Magnetic properties after irradiation of the mixture of Cu(hfac)(2) and tetrapyridine-pentadiazo compound 4 in MTHF/CH2Cl2 solutions by 1:2, 1: 1, and 2:1 ratios were investigated by SQUID magneto/susceptometry. Field dependence of magnetization at 2 K after irradiation of the 1:2 mixture suggested the formation of high-spin complex, 4c-Cu(hfac)(2)-4c, with S = 21/2. In M vs. H plots for the 1: 1 and 2:1 mixtures, hysteresis loops with coercive force, H-c ca. I and 2 Oe, respectively, were observed. In the a.c. magnetic susceptibility measurement of the 2:1 mixture under similar condition, in-phase and out-of-phase components (chi' and chi", respectively) were observed below 18 K. The frequency dependence of peak-top temperature of chi' and chi'' suggested that its magnetic behavior was spin-glass like. (C) 2003 Elsevier Science Ltd. All rights reserved.

引用

页码：1877 / 1882

页数：6

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