Synthesis, crystal structures and magneto-structural correlations study of three 3d metal-radical heterospin complexes

被引：4

作者：

Gao, Yuan-Yuan ^{[1
,2
,3
]}

Yang, Ming-Fang ^{[1
,2
,3
]}

Han, Ning ^{[1
,2
,3
]}

Ma, Yue ^{[1
,2
,3
]}

Wang, Ya-Li ^{[1
,2
,3
]}

Tong, Yu-Zhang ^{[1
,2
,3
]}

Wang, Qing-Lun ^{[1
,2
,3
]}

Li, Li-Cun ^{[1
,2
,3
]}

Liao, Dai-Zheng ^{[1
,2
,3
,4
]}

机构：

[1] Nankai Univ, Dept Chem, Tianjin 300071, Peoples R China

[2] Nankai Univ, Key Lab Adv Energy Mat Chem MOE, Tianjin 300071, Peoples R China

[3] Nankai Univ, TKL Met & Mol Based Mat Chem, Tianjin 300071, Peoples R China

[4] Xiamen Univ, State Key Lab Phys Chem Solid Surface, Xiamen 361005, Peoples R China

来源：

INORGANICA CHIMICA ACTA | 2013年 / 397卷

基金：

中国国家自然科学基金;

关键词：

3d transition metal complex; Nitronyl nitroxide radical; Crystal structure; Magnetism; MAGNETIC-PROPERTIES; NITRONYL; NITROXIDE; BEHAVIOR; TRANSITION; DYNAMICS; LIGANDS; SYSTEMS;

D O I：

10.1016/j.ica.2012.11.013

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Three heterospin complexes [M(NIT4Py)(2)(cda)H2O] (M = Cu(II) (1), Ni(II) (2), Co(II) (3)) with various paramagnetic 3d metal ions and pyridyl-substituted nitronyl nitroxide radical (NIT4Py = 2-(4'-pyridyl)-4,4,5,5- tetramethyl-imidazoline-1-oxyl-3-oxide, H(2)cda = 4-hydroxy-pyridine-2,6-dicarboxylic acid) have been synthesized, characterized structurally and magnetically. The single crystal structures show that complexes 1-3 are isomorphic, and have 2D supramolecular network consisting of [M(NIT4Py)(2)(cda)H2O] with three paramagnetic centers. The magnetic measurements indicated that complexes 1-3 exhibit all antiferromagnetic interactions between M(II) and radicals with J(Cu-rad) = -7.30 cm(-1), J(Ni-rad) = -3.58 cm(-1) and J(Co-rad) = -1.85 cm(-1), respectively. Their magnetic behaviors were interpreted in terms of the spin polarization mechanism of the pi-electrons of NIT4Py and the orthogonality of 3d magnetic orbital of M(II) ion and the 2p pi orbital on the pyridine rings of NIT4Py. (C) 2012 Elsevier B. V. All rights reserved.

引用

页码：32 / 37

页数：6

共 53 条

[1] Magnetic susceptibility analysis of mixed metal cubane-type cluster complexes, [tetra-mu(3)-thiotris{tri(aqua)molybdenum}aquairon](4+)p-toluensulfonate heptahydrate and [tetra-mu(3)-thiotris{tri(aqua)molybdenum}aquanickel](4+)p-toluensulfonate heptahydrate [J].