Photo-induced phase transitions probed by X-ray absorption spectroscopy: Fe(II) spin crossover complex

被引：20

作者：

Oyanagi, H ^{[1
]}

Tayagaki, T

Tanaka, K

机构：

[1] Natl Inst Adv Ind Sci & Technol, Umezono 1-1-1, Tsukuba, Ibaraki 3058568, Japan

[2] Kyoto Univ, Grad Sch Sci, Dept Phys, Kyoto 6068502, Japan

来源：

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS | 2004年 / 65卷 / 8-9期

关键词：

D O I：

10.1016/j.jpcs.2003.10.077

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Photo-induced phase transitions in spin-crossover complex [Fe(II)(2-pic)(3)]Cl2EtOH were investigated by X-ray absorption spectroscopy (XAS) technique. In situ XAS results showed that the metal-ligand (Fe-N) bond distance expands by ca. 0.20 Angstrom upon photo-induced (S = 0 --> S = 2) spin conversion. We find that nearly octahedral (0(h)) symmetry of FeN6 coordination remains in the photo-induced high spin state. The next-nearest neighbor Fe-C radial distribution shows a subtle change due to local distortions of ligand molecules. Inhomogeneous distribution of strains may disturb cooperative photo-induced phase transitions removing centers of inversion symmetry. (C) 2004 Elsevier Ltd. All rights reserved.

引用

页码：1485 / 1489

页数：5

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