A new Fe-6 ferric cluster: synthesis, crystal structure and magnetic properties

作者：Qian Jing; Tian Jinlei; Gu Wen; Gao Song; Xin Liu; Yan Shiping^*; Ribas Joan; Liao Daizheng; Cheng Peng

来源：Dalton Transactions, 2008, (48): 6948-6952.

DOI：10.1039/b808916g

A new Fe-6(III) cluster, [Fe3L2(ida)(mu-OH)(3)(mu-O)](2)center dot 4ClO(4)center dot 2CH(3)OH center dot 8H(2)O (1) (where L = N-methyl-N, N-bis(2-pyridylmethyl)amine; H(2)ida = iminodiacetic acid), has been synthesized and magnetic properties are shown. The asymmetric unit of 1 contains a triangular [Fe3L2(ida)(mu-OH)(3)(mu-O)](2+) unit and two such trinuclear units are further connected by two ida(2-), generating a hexanuclear Fe-III core in 1. Variable temperature magnetic susceptibility studies reveal the presence of dominant antiferromagnetic exchange interactions and the variable-field and temperature magnetization measurements establish that each Fe-3 cluster has S = 5/2 ground state and the coupling between the two moieties is almost zero.

• 出版日期2008
• 单位南开大学; 北京大学; 天津师范大学