Spin transition and relaxation dynamics coupled to a crystallographic phase transition in a polymeric iron(II) spin-crossover system

被引：40

作者：

Krivokapic, Itana ^{[1
]}

Enachescu, Cristian ^{[2
]}

Bronisz, Robert ^{[3
]}

Hauser, Andreas ^{[1
]}

机构：

[1] Univ Geneva, Dept Chim Phys, CH-1211 Geneva 4, Switzerland

[2] Alexandru Ioan Cuza Univ, Dept Phys, Iasi 700506, Romania

[3] Univ Wroclaw, Fac Chem, PL-50383 Wroclaw, Poland

来源：

CHEMICAL PHYSICS LETTERS | 2008年 / 455卷 / 4-6期

关键词：

D O I：

10.1016/j.cplett.2008.02.088

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The spin-crossover compound [ Fe(bbtr)(3)](ClO4)(2) (bbtr = 1,4-di(1,2,3-triazol-1-yl) butane) forms a polymeric hexagonal sheet structure. It shows an abrupt thermal spin transition with 13 K wide hysteresis around 105 K, as evidenced by single crystal optical spectroscopy. The transition temperature for the thermal high-spin -> low-spin transition on cooling as well as the relaxation kinetics just below T-c(down arrow) depend upon the history of the sample. This is typical for a nucleation and growth mechanism and domain formation. In contrast, the high-spin -> low-spin relaxation following the light-induced population of the high-spin state at low temperatures is governed by the intersystem crossing process. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：192 / 196

页数：5

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