Tuning the spin crossover above room temperature:: iron(II) complexes of substituted and deprotonated 2,6-bis(benzimidazol-2-yl)pyridine

被引：53

作者：

Boca, R

Renz, F

Boca, M

Fuess, H

Haase, W

Kickelbick, G

Linert, W

Vrbová-Schikora, M

机构：

[1] Slovak Univ Technol Bratislava, Dept Inorgan Chem, SK-81237 Bratislava, Slovakia

[2] Univ St Cyril & Methudius, Dept Chem, Trnava, Slovakia

[3] Johannes Gutenberg Univ Mainz, Inst Inorgan & Analyt Chem, D-55099 Mainz, Germany

[4] Slovak Acad Sci, Inst Inorgan Chem, SK-84535 Bratislava, Slovakia

[5] Tech Univ Darmstadt, Inst Chem Phys, Inst Sci Mat, D-64289 Darmstadt, Germany

[6] Vienna Univ Technol, Inst Mat, Inst Appl Synth Chem, A-1060 Vienna, Austria

来源：

INORGANIC CHEMISTRY COMMUNICATIONS | 2005年 / 8卷 / 02期

关键词：

iron(II) complexes; spin crossover; magnetism; cooperativeness;

D O I：

10.1016/j.inoche.2004.12.014

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The complex [Fe(tzimpy)(2)](ClO4)(2) . 2H(2)O (tzimpy = 2,4,6-tris-(benzimidazol-2-yl)pyridine) shows an abrupt spin crossover (S = 0-2 transition) above room temperature centered at T-c = 323 K with a hysteresis width of AT = 35 K. The neutral iron(II) complex with deprotonated bzimpy ligands (bzimpy = 2,6-bis(benzimidazol-2-yl)pyridine) exhibits a gradual spin transition on the first heating with T, = 424 K. There are irreversible changes between T = 503 and 523 K: the liberation of the crystal water, the color change (blue-green) followed by a structure change. Next thermal cycles are reproducible though, heating/cooling paths are different from the first heating. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：227 / 230

页数：4

共 17 条

[1] SYNTHESIS OF SOME BENZIMIDAZOLE-DERIVED AND BENZOTHIAZOLE-DERIVED LIGAND SYSTEMS AND THEIR PRECURSORY DIACIDS [J].