弱作用基有机发光材料

Weak Interaction-Based Organic Luminescent Materials

近年来,在非共轭甚至完全不含π电子的结构中发现的反常发光现象引起了人们的广泛关注.然而,由于其发光机制不清以及发光性能较差,导致这一领域的发展较为缓慢.总结了近年来在此类弱作用基发光材料的空间共轭机理研究及性能调控方面的最新研究进展.首先,基于非共轭多芳基烷烃机理研究模型,提出了弱作用基发光材料的空间共轭机制,并开发了空间共轭的构象和基元电子结构调控策略,基于这些策略成功开发出了高效率全光色发射的弱作用基发光聚合物.与此同时,研究发现空间共轭在传统具有共轭结构的扭转分子中也广泛存在,被认为是聚集诱导发光效应的一个重要发光机理.

In recent years,the abnormal luminescent phenomena discovered in non-conjugated structures or even lackingπ-electrons have drawn widespread attention.However,due to unclear luminescent mechanisms and poor luminescent performance,the development in this field has been relatively slow.In this review,the latest research progress in the through-space conjugation(TSC)mechanism and performance regulation of weak interaction-based luminescent materials in recent years is summarized.Firstly,based on the mechanism research model of non-conjugated multiarylalkanes,the TSC mechanism of weak interaction-based luminescent materials is proposed.Strategies have been developed for regulating TSC intensity by changing the conformation of molecules and the electronic structure of subunits,leading to the successful development of weak interaction-based luminescent polymers with highly efficient full-color emission.Meanwhile,it is found that TSC widely exists in twisted molecules withπ-conjugated structure,believed to be an important luminescent mechanism for aggregation-induced emission effect.