Structure and magnetic properties of a novel heterospin 1-D chain complex containing both Cu(Ⅱ) and nitroxide radicals as spin branches  

作　　者：MA Yue, CHEN XiaoPing, CAO Dong, YAN ShiPing & LIAO DaiZheng Department of Chemistry, Nankai University, Tianjin 300071, China 

出　　处：《Science China Chemistry》2009年第9期1438-1443,共6页中国科学（化学英文版）

基　　金：Supported by the National Natural Science Foundation of China (Grant No. 20631030);973 Project (Grant No. 2007CB815305);Natural Science Foundation of Tianjin (Grant No. 09JCYBJC05500);100 Projects of Creative Research for the Undergraduates of Nankai University in China (Grant No. BX7-207).

摘　　要：A novel heterospin one-dimensional (1-D) chain complex containing both Cu(Ⅱ) and nitroxide radical ligands, {[Cu(tcph)(H2O)4][Cu(tcph)(NIT3Py)2]·2H2O}n (1) (H2tcph = tetrachloro-phthalic acid, NIT3Py = 2-(3′-pyridyl)-4,4,5,5-tetramethyl-imidazoline-1-oxyl-3-oxide), has been synthesized and structurally characterized. The structure consists of neutral chains of copper(Ⅱ) ions bridged by tcph and coordinated alternatively by nitroxide radicals as spin branches and solvated water as co-ligand. The magnetic data were fitted using an approximate theoretical model based on population analysis to obtain the coupling parameter values of JCu2-Rad = 22.4 cm-1 and J′Cu1-Cu2 = -2.4 cm-1, indicating the intramolecular ferromagnetic interaction between Cu(Ⅱ) and NIT3Py and weak antiferromagnetic interaction between Cu1 and Cu2 linked by tcph.A novel heterospin one-dimensional (1-D) chain complex containing both Cu(Ⅱ) and nitroxide radical ligands, {[Cu(tcph)(H2O)4][Cu(tcph)(NIT3Py)2]·2H2O}n (1) (H2tcph = tetrachloro-phthalic acid, NIT3Py = 2-(3′-pyridyl)-4,4,5,5-tetramethyl-imidazoline-1-oxyl-3-oxide), has been synthesized and structurally characterized. The structure consists of neutral chains of copper(Ⅱ) ions bridged by tcph and coordinated alternatively by nitroxide radicals as spin branches and solvated water as co-ligand. The magnetic data were fitted using an approximate theoretical model based on population analysis to obtain the coupling parameter values of JCu2-Rad = 22.4 cm-1 and J′Cu1-Cu2 = -2.4 cm-1, indicating the intramolecular ferromagnetic interaction between Cu(Ⅱ) and NIT3Py and weak antiferromagnetic interaction between Cu1 and Cu2 linked by tcph.

关 键 词：nitronyl NITROXIDE RADICAL Cu(Ⅱ) complex tetrachloro-phthalic acid crystal STRUCTURE MAGNETIC properties 

分 类 号：O621.2[理学—有机化学]