Magnetic properties after irradiation of poly(m-phenyleneethynylene) having diazo and nitronylnitroxide groups and its model compounds

被引：5

作者：

Akita, T ^{[1
]}

Koga, N ^{[1
]}

机构：

[1] Kyushu Univ, Fac Pharmaceut Sci, Fukuoka 8128582, Japan

来源：

POLYHEDRON | 2001年 / 20卷 / 11-14期

关键词：

high-spin molecule; magnetism; carbene; nitroxide; phenyleneethynylene; polymer;

D O I：

10.1016/S0277-5387(01)00638-6

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

In order to achieve a pure organic high-spin molecule, poly(m-phenyleneethynylene) derivative 1 having diazo groups and nitronyl nitroxide moieties alternately were designed. Its three model compounds, diphenylacetylene derivative 2, bis(phenylethynyl)benzene derivative 3, and oligomeric compound 4 having partial structure of 1 have been prepared by the coupling reaction of ethynyl derivatives of phenylnitronylnitroxide and iodo derivatives of diphenyldiazomethane. Field dependence of magnetization after irradiation of 2 and 3 in frozen solutions suggested that the photo-generated species have quartet and quintet ground states with J/k(B), values of + 1.75 and + 1.09 K, respectively. However, spin interaction between carbene and nitronylnitroxide through 3,3-diphenylacetylene moiety is not strong enough to form high-spin chain having long correlation length for 4. (C) 2001 Elsevier Science Ltd. All rights reserved.

引用

页码：1475 / 1477

页数：3