Photoexcitation in the Spin-Crossover Compound [Fe(pic)3]Cl2·EtOH (pic = 2-Picolylamine)
Photoexcitation in the Spin-Crossover Compound [Fe(pic)3]Cl2·EtOH (pic = 2-Picolylamine)
复制标题
自旋交叉化合物 [Fe(pic)3]Cl2·EtOH (pic = 2-Picolylamine) 中的光激发
DOI：
10.1021/jp020765o
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发表时间：
2002
影响因子：
3.3
通讯作者：
A. Hauser
中科院分区：
文献类型：
--
作者：
C. Enachescu;Ulrich Oetliker;A. Hauser
[Fe(pic)3]Cl2·EtOH （pic = 2-picolylamine）是一种自旋交叉化合物，可以在低于热转变温度的温度下，通过电磁波谱可见部分的光照射，从低自旋态转变为高自旋态。对于该化合物，关于光转化过程的量子效率及其可能与辐照强度的关系的问题引起了一些争议。实验结果表明，在11 K时，光转换的量子效率为1数量级，与辐照强度没有明显的关系。然而，它确实在某种程度上取决于已经转化为高自旋态的配合物的比例。
[Fe(pic)3]Cl2·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.