纯有机主客体“片段”掺杂超长室温磷光材料的设计合成与性能研究

Organic persistent room-temperature phosphorescence material is a kind of smart material with great development potential. In recent years, it develops rapidly due to its broad application prospects in optical encryption, biological imaging and luminescent devices. In this project, to overcome the constraint between the luminescence efficiency and lifetime in one single crystal, we intended to adopt the strategy of fragment-doping of host-guest for persistent room-temperature phosphorescence materials. For the selection of host material in solid state under the fluorescent material with high brightness of aggregation induced delay fluorescence property, the guest should be as long material as the host in the persistent room-temperature phosphorescence properties of electron-withdrawing groups. Among them, the structure of the host and the guest material are similar having closed energy level , and the obtained persistent room-temperature phosphorescence material has the characteristics of adjustable luminous color, high brightness and long lifetime. The luminescence mechanism and its regulation mechanism were elucidated through the relationship between molecular structure, aggregation structure and luminescence properties. The successful implementation of this project provides a new idea and direction for improving the luminescence performance of organic persistent room-temperature phosphorescence materials, and lays a good foundation for further application research.

有机超长室温磷光材料是一类有着巨大发展潜力的智能材料，近年来发展迅速，在光学加密、生物成像和发光器件等领域具有广阔的应用前景。为克服单个有机分子的发光效率和发光寿命之间存在相互制约的问题，本项目拟采用主客体“片段”掺杂的策略获得超长室温磷光材料，其中主体材料选择在固态下具有高亮度的聚集诱导延迟荧光材料，客体材料为主体材料中具有超长室温磷光性质的吸电子基团片段。其中，主体和客体材料结构近似且能级相近，所获得的超长室温磷光材料具有发光颜色可调、亮度高以及持续时间长等特点。通过分子结构、聚集态结构以及发光性能间的联系，阐明其发光机理和调控机制。本项目的成功实施，为提高有机超长室温磷光材料的发光性能方面提供新的思路和方向，为进一步的应用研究打下良好基础。

有机主-客体掺杂超长室温磷光材料近几年发展迅速，在安全应急指示、信息存储、防伪保密、传感响应以及生物成像等领域具有广阔的应用前景。但是采用怎样的掺杂策略可以容易地得到空气中稳定、高亮度且长寿命的有机超长室温磷光材料成为了一个极具挑战的研究课题。本项目围绕以上问题，基于结构相似的主客体掺杂策略，获得了系列超长室温磷光材料。并对该类材料的分子设计、发光机理及外部刺激响应行为开展了详细的研究。主要执行了以下工作：(1)主体材料聚集态结构为结晶状态的发光性能研究；(2)主体材料聚集态结构为无定形状态的发光性能研究；(3)主体或客体材料的开发及发光性能研究。相关成果在包括化学类顶级期刊Adv.Mater.（1篇，入选ESI高被引论文）和Angew.Chem.Int.Ed.（2篇，其中期刊Hot论文1篇）等标注SCI论文9篇。申请中国发明专利7项，已获授权2项。本项目的实施将为高性能超长室温磷光材料的开发和应用发展打下良好的基础，因而具有重要的理论意义和实际实用价值。