Synthesis, structure and magnetic properties of an iron(II) complex with nitronyl nitroxides

被引：18
作者：
Nihei, Masayuki [1 ]
Maeshima, Tadashi [1 ]
Kose, Yuka [1 ]
Oshio, Hiroki [1 ]
机构：
[1] Univ Tsukuba, Grad Sch Pure & Appl Sci, Tsukuba, Ibaraki 3058571, Japan
来源：
POLYHEDRON | 2007年 / 26卷 / 9-11期
关键词：
tridentate nitrogen ligand; nitronyl nitroxide; molecular magnetism; iron; spin-crossover;
D O I：
10.1016/j.poly.2006.09.052
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
An iron(II) complex with nitronyl nitroxides, [Fe-II(dppNN)(2)](BF4)(2) center dot CH3COCH3 (1) (dppNN = 2,6-di(pyrazol-1-yl)-4-(4,4,5,5-tetra-methyl-1-oxido-3-yl)-4-(4,5-dihydro-3H-imidazol-2 '-yl)pyridine) was synthesized. In 1 the central iron(II) ion was coordinated by two tridentate ligands with nitronyl nitroxides. Magnetic susceptibility measurements showed that chi T-m values below 130 K was almost temperature independent, while upon increasing temperature chi T-m values showed gradual increase, suggesting an occurrence of a spin transition from low to high spin state. Green light irradiation on powder sample at 5 K resulted in spin conversion (LIESST). (c) 2006 Elsevier Ltd. All rights reserved.
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页码：1993 / 1996
页数：4
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