A cw/pulsed ESR study of a calix[4]arene biradical with two nitroxides

被引：4
|
作者：
Sato, K [1 ]
Sawai, T
Shiomi, D
Takui, T
Wang, Q
Wang, JS
Li, Y
Wu, GS
机构：
[1] Osaka City Univ, Dept Chem, Sumiyoshi Ku, Osaka 5588585, Japan
[2] Osaka City Univ, Dept Mat Sci, Grad Sch Sci, Sumiyoshi Ku, Osaka 5588585, Japan
[3] Tsing Hua Univ, Dept Chem, Beijing 100084, Peoples R China
来源：
SYNTHETIC METALS | 2003年 / 137卷 / 1-3期
关键词：
novel calixarene-based biradical; nitroxide; organic magnetism; electron spin transient nutation spectroscopy; pulsed ESR spectroscopy;
D O I：
10.1016/S0379-6779(02)00982-7
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A calix[4]arene based biradical with two tert-butyl nitroxide radicals has been studied by cw and pulsed ESR spectroscopy. Two nitroxide radicals antiferromagnetically interact with each other, generating a thermally accessible triplet state. The spin multiplicity of the biradical was identified by a pulsed ESR-based 2D-electron spin transient nutation (ESTN) spectroscopy. Based on spin Hamiltonian parameters of the biradical determined from a spectrum simulation, a salient electronic local structure of the radical sites with pi-orbitals on the nitrogen atoms facing each other was determined.
引用
收藏
页码：1197 / 1198
页数：2
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