晶态咔唑基有机室温磷光材料  

Crystalline Carbazole Based Organic Room-Temperature Phosphorescent Materials

作　　者：龚筑轲 许辉[1] Zhuke Gong;Hui Xu(School of Chemistry and Materials,Heilongjiang University,Harbin 150080,China)

机构地区：[1]黑龙江大学化学化工与材料学院,哈尔滨150080

出　　处：《化学进展》2022年第11期2432-2461,共30页Progress in Chemistry

摘　　要：自2008年咔唑的有机室温磷光(Organic Room-Temperature Phosphorescence,ORTP)被证实后,以咔唑单元构建ORTP材料成为一种行之有效的方法,并发展出一系列结构多样、性能优异、应用广泛、极具代表性的ORTP材料体系。本文首先总结了改善ORTP材料磷光性能的三种策略,即H-聚集体、重原子效应和给受体结构。在此基础上,系统梳理了晶态咔唑类有机室温磷光材料的研究进展,介绍了通过上述三种策略,抑制三重态松弛、增强自旋轨道耦合,以及减小单重态-三重态能级差、增强分子间电荷转移相互作用力,从而稳定三重激发态、增加系间窜越速率、促进磷光发射,最终实现长寿命高效率晶态咔唑类ORTP材料。最后,介绍了ORTP材料在防伪、信息安全和生物成像等领域的应用。Since the demonstration of organic room temperature phosphorescence(ORTP)from carbazole in 2008,using carbazole unit to construct ORTP materials has become a feasible approach to developing a series of diverse,high-performance,widely applicable and highly representative ORTP material system.This review paper firstly summarizes three strategies for improving phosphorescence performance of ORTP materials,namely H-aggregation,heavy-atom effect and donor-acceptor structure.Then,the recent progress of crystalline carbazole-based ORTP materials is systematically introduced.Based on these three strategies,triplet relaxation is suppressed,spin-orbital coupling is enhanced,singlet-triplet energy gaps are reduced,and intermolecular charge transfer interactions are strengthened.As a result,the triplet excited states are stabilized,and intersystem crossing is accelerated to facilitate phosphorescence,and thereby realizing long-lifetime high-efficiency crystalline carbazole-based ORTP materials.Their applications in the fields of anti-counterfeiting,information security and bioimaging are briefly discussed.

关 键 词：咔唑 有机室温磷光 系间窜越 磷光寿命 磷光量子产率 

分 类 号：O644.1[理学—物理化学] TB34[理学—化学]