MAGNETIC-PROPERTIES OF 1,5-DIMETHYLVERDAZYL RADICALS .1. EVIDENCE FOR THE FERROMAGNETIC EXCHANGE INTERACTION IN 3-(4-CHLOROPHENYL)-1,5-DIMETHYL-6-THIOXOVERDAZYL RADICAL SOLID

被引：49

作者：

MUKAI, K ^{[1
]}

NEDACHI, K ^{[1
]}

JAMALI, JB ^{[1
]}

ACHIWA, N ^{[1
]}

机构：

[1] KYUSHU UNIV,FAC SCI,DEPT PHYS,FUKUOKA 812,JAPAN

来源：

CHEMICAL PHYSICS LETTERS | 1993年 / 214卷 / 06期

关键词：

D O I：

10.1016/0009-2614(93)85683-F

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Magnetic susceptibilities of 3-(4-chlorophenyl)-1,5-dimethyl-6-thioxoverdazyl (p-CDTV) and 3-(4-bromophenyl)-6-thioxoverdazyl (p-BDTV) radicals have been measured in the temperature range between 4.0 and 300 K. The susceptibility of p-CDTV follows the Curie-Weiss law with a Curie constant of 0.381 K emu/mol and a positive Weiss constant of theta = +3.2 K, suggesting intermolecular ferromagnetic exchange interaction between neighboring radicals. On the other hand, the magnetic susceptibility of p-BDTV exhibits a broad maximum at 26.5 K. This susceptibility can be explained by the one-dimensional Heisenberg model with negative exchange interaction of 2J/k = -41.3 K.

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页码：559 / 562

页数：4

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