Relaxation kinetics of photoexcited states in a chain of exchange clusters in the mean-field approximation

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• 作者：V. A. Morozov
• 关键词：exchange cluster ; spin crossover ; light ; induced Jahn–Teller transitions ; structural relaxation kinetics
• 刊名：Journal of Structural Chemistry
• 出版年：2016
• 出版时间：December 2016
• 年：2016
• 卷：57
• 期：8
• 页码：1493-1498
• 全文大小：
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Inorganic Chemistry; Physical Chemistry; Atomic, Molecular, Optical and Plasma Physics; Atomic/Molecular Structure and Spectra; Solid State Physics;
• 出版者：Pleiades Publishing
• ISSN：1573-8779
• 卷排序：57

文摘

A theoretical description of the relaxation kinetics of photoexcited states in chains of exchange clusters is developed in the mean-field approximation. It is found that in contrast to the analog of this phenomenon in the light-induced electron spin-state trapping (LIESST) effect well known for the conventional spin crossover compounds of Fe(II), the relaxation kinetics in chains of exchange clusters can be self-decelerating due to the different relaxation rates of two types of photoexcited states in the chain. The proposed theoretical approach qualitatively explains the experimentally observed difference in relaxation kinetics at different initial excitation intensities of the system during photoexcitation of breathing crystal compounds.