The zwitterionic radical and its neutral radical derivative with interesting magnetic properties

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• 作者：Yiman Zhang ; Guoping Yong ; ^{gpyong@ustc.edu.cn} ; Chongfu Li ; Wenlong She ; Yingzhou Li
• 关键词：Radical ; 2-(Imidazo[1 ; 2-a]pyridin-2-yl)-2-oxo-N-(pyridin-2-yl)acetamide ; Crystal structure ; Magnetic property ; Conductivity
• 刊名：Synthetic Metals
• 出版年：2012
• 出版时间：January 2012
• 年：2012
• 卷：161
• 期：23-24
• 页码：2708-2713
• 全文大小：819 K

文摘

A new neutral radical was synthesized from a zwitterionic radical via radical oxidation ring-opening reaction under mild conditions. The zwitterionic radical displays interesting magnetic behavior, and it also possesses higher conductivity. The neutral radical exhibits unusual twice magnetic phase transition behaviors, including a high ferromagnetic to antiferromagnetic phase transition temperature (ca. 382 K), which can be attributed to the anisotropic contraction and non-uniform slippage of columnar stacking chain and the changes of close intermolecular contacts. These unique magnetic behaviors ascribe to their different stacking structures.