微孔分子筛主-客体复合体系及其电子转移过程

Host-guest composite systems and electron transfer of microporous zeolites

沸石分子筛是一类带有规则微孔结构的硅铝酸盐晶体,因其骨架具有独特的电子给受能力而备受关注.由此,许多以微孔分子筛为主体的电子转移体系被构建并深入研究.与溶液相中自由基的快速衰减不同,产生于微孔分子筛内部的自由基受其纳米孔道的限制,具有有限的迁移率和较长的寿命,有助于人们利用传统光谱技术确定反应机理.本文主要对当前微孔分子筛主-客体复合体系中的电子转移过程和机制的研究现状加以论述.

Zeolites are crystalline aluminosilicates with uniform microporous structures. As one of the most intriguing properties of zeolites, the electron-donating and accepting ability of the zeolite framework has attracted many attentions Accordingly, many unique electron transfer systems have been developed based on zeolitic hosts. Compared to the rapid decay in solution, the free radicals generated within nano-sized zeolite pores have limited mobility and long lifetimes, thereby making it easier to identify the reaction mechanism by conventional spectroscopictechniques. In this review, we primarily discuss the recent progress on electron transfer processes in zeolite-supported host-guest composite systems.