Photoexcitation in the spin-crossover compound [Fe(pic)3]Cl2•EtOH (pic=2-picolylamine)

被引：59
|
作者：
Enachescu, C [1 ]
Oetliker, U [1 ]
Hauser, A [1 ]
机构：
[1] Univ Geneva, Dept Chim Phys, CH-1211 Geneva, Switzerland
来源：
JOURNAL OF PHYSICAL CHEMISTRY B | 2002年 / 106卷 / 37期
关键词：
D O I：
10.1021/jp020765o
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：
[Fe(pic)(3)]Cl-2.EtOH (pic = 2-picolylamine) is a spin-crossover compound that can be converted from the low-spin state to the high-spin state at temperatures below the thermal transition temperature by way of light irradiation in the visible part of the electromagnetic spectrum. For this compound, the question regarding the quantum efficiency of this photoconversion process and its possible dependence on irradiation intensity gave rise to some controversy. The experimental results presented in this paper demonstrate that the quantum efficiency of the photoconversion at 11 K is on the order of unity, with no noticeable dependence on irradiation intensity. It does, however, depend to some extent on the fraction of complexes already converted to the high-spin state.
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收藏
页码：9540 / 9545
页数：6
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