高分子长余辉发光材料的制备、发光机理与应用

Organic functional materials with long-lived excited states have attracted considerable attention for their application in bioimaging, photocatalytic reactions and photovoltaics recently. Persistent luminescence as a typical model of long-excited states is limited in inorganics and a few small molecules. To date, studies on persistent luminescent polymers have not been reported yet. In this proposal, oriented by polymer persistent luminescence, polymer materials with H-aggregation will be prepared by chemical reaction and supermolecular engineering, basing on the rational selection of chromophores containing long pair electron elements and self-assembly structures. Together with the first principle, relationships between molecular configuration and persistent luminescence will be revealed to construct the luminescent theory model via stimulating the electron structures and distribution, composition and energy levels. In addition, new applications in novel organic light-emitting diodes, organic solar cells, bioimaging and data encryption will be explored, which will promote the development of organic persistent luminescence.

近年来，具有长寿命激发态性质的光电功能材料在生物成像、光催化、光伏电池等领域备受关注。长余辉发光作为长寿命激发态的典型代表，其主要局限在无机材料和少数小分子有机体系。目前，针对高分子长余辉发光材料的研究尚未有报道。本项目拟以高分子长余辉发光为导向，利用化学合成和超分子工程策略，理性地选择含有孤对电子元素的发色团和自组装结构单元，制备具有H-聚集结构的高分子材料体系；结合第一性原理，通过模拟构建单元、聚集结构的电子结构与分布、构成成分、轨道能级等，揭示分子构型与高分子长余辉发光的关系，构建高分子长余辉发光理论模型；根据其性质，探索这类材料在新型有机电致发光、太阳能电池、生物成像与数据加密等领域的新应用，从而推动有机长余辉发光的发展。

近年来，具有长寿命激发态性质的光电功能材料在生物成像、光催化、光伏电池等领域备受关注。长余辉发光作为长寿命激发态的典型代表，其主要局限在无机材料和少数小分子有机体系。目前，针对高分子长余辉发光材料的研究鲜有报道。本项目以实现高分子材料的长余辉发光为目标，获得了离子型高分子长余辉发光，其发射寿命长达2.1 s；通过分子自组织获得兼具高效率和长寿命的超分子有机长余辉发光以及有机芳香骨架的超分子长余辉发光。并实现这些材料在数据加密、气体传感等领域的应用。本项目的研究不仅拓展了有机长余辉发光的材料体系，同时也拓宽了这类材料的应用领域。