Polymorphism in the spin-crossover ferric complexes [(TPA)FeIII(TCC)]PF6

被引：39

作者：

Collet, Eric ^{[1
]}

Boillot, Marie-Laure ^{[2
]}

Hebert, Johan ^{[1
]}

Moisan, Nicolas ^{[1
]}

Servol, Marina ^{[1
]}

Lorenc, Maciej ^{[1
]}

Toupet, Loic ^{[1
]}

Buron-Le Cointe, Marylise ^{[1
]}

Tissot, Antoine ^{[2
]}

Sainton, Joelle ^{[2
]}

机构：

[1] Univ Rennes 1, Inst Phys, CNRS, UMR 6251, F-35042 Rennes, France

[2] Univ Paris Sud, CNRS, UMR 8182, Inst Chim Mol & Mat Orsay, Orsay, France

来源：

ACTA CRYSTALLOGRAPHICA SECTION B-STRUCTURAL SCIENCE CRYSTAL ENGINEERING AND MATERIALS | 2009年 / 65卷

关键词：

CRYSTAL-STRUCTURE; MAGNETIC-PROPERTIES; SOLID-STATE; SPECTROSCOPY; TRANSITION; IRON;

D O I：

10.1107/S0108768109021508

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We have identified two polymorphs of the molecular complex [(TPA)Fe-(III)(TCC)]PF6 [TPA = tris(2-pyridylmethyl)amine and TCC = 3,4,5,6-tetrachlorocatecholate dianion]: one is monoclinic and the other is orthorhombic. By lowering the temperature both undergo a thermal spin-crossover between a high-spin (S = 5/2) and a low-spin (S = 1/2) state, which we detected by magnetic, optical and X-ray diffraction measurements. The thermal crossover is only slightly shifted between the polymorphs. Their crystalline structures consist of similar cation layers alternating with PF6 anion layers, packed differently in the two polymorphs. The magnetic and optical properties of the polymorphs are presented.

引用

页码：474 / 480

页数：7

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