辐照依赖性聚合物基长余辉发光材料：设计合成、结构调控及防伪应用

Pure organic long persistent luminescence (OLPL) materials have found wide application in biological imaging, optical recording, information storage, and security system, etc. However, the realization of high efficiency OLPL at room temperature is a great challenge, especially for the amorphous polymer based long persistent luminescence (PLPL) materials. Here, we will use the TD-DFT method, calculate, optimize, and synthesis organic molecules with potential long persistent luminescence properties, then detailed study the UV irradiation-dependent long persistent luminescence properties of the films, which formation through doping these organic molecules into the PVA matrix, especially for the far UV or visible light irradiance-dependence. Through modulating the structures (substituent groups, location, and so on) , optimizing their long persistent luminescence performance, then constructing a reasonable design strategy for developing radiation-dependent PLPL material. Thus, a series of PLPL materials with high persistent brightness, long lifetimes (> 10s) and high quantum yield under ambient will be obtained. Through screen printing technology without any inks and ink-jet printing technology, advanced anti-counterfeiting applications can be achieved in bills, luxury goods, money and military/government confidential documents. It will provide the theoretical design and practical application basis for the further development of long persistent luminescence materials, especially for the further development of amorphous organic long persistent luminescence materials.

纯有机长余辉发光（OLPL）材料在生物成像、光学记录、信息存储、防伪系统等诸多高新科技领域有着诱人的应用前景，但在室温下实现高效OLPL是一个极大的挑战，尤其是无定型聚合物基长余辉发光（PLPL）材料。本项目将通过TD-DFT方法，计算、优化、合成潜在的具有长余辉性能的有机分子，并详细研究有机分子掺杂到PVA基质中成膜后的余辉性能的紫外辐照依赖性，特别是远紫外或可见光的辐照依赖性。通过对有机分子结构进行调控（取代基种类、位置等），优化其长余辉性能，构建合理的辐照依赖性PLPL材料设计策略，从而获得大气环境下余辉亮度高、余辉时间长（＞10s）、量子产率高的系列PLPL材料。借助无油墨丝网印刷、喷墨打印等技术,实现该系列PLPL材料在票据、奢侈品、纸币、军方/政府机密文件等领域的高级防伪应用。为长余辉发光材料，特别是无定型有机长余辉发光材料的进一步发展，提供相应的理论设计与实际应用基础。

针对有机长余辉发光材料在照明显示、生物传感、信息防伪、光学探测等领域的应用需求，以及有机长余辉材料中磷光体和基质掺杂体系带来的结构和性能不稳定等一系列关键科学问题。本项目通过氢键/交联协同抑制非辐射跃迁实现辐照依赖性高分子长余辉材料的学术思想，开发了系列高亮度长寿命的辐照依赖性高分子长余辉发光材料，实现了长余辉发光材料的高级防伪应用；提出了多发光中心实现余辉颜色精细调控的高分子长余辉材料策略，拓展了激发依赖性有机长余辉发光材料的余辉颜色，可实现余辉颜色从蓝色到红色精细调控；利用分子自组装工程，实现了长寿命大面积柔性高分子长余辉材料发光体系。这些研究成果为开发更加智能化新材料并实现在有机光电子、柔性电子等领域应用提供了新思路。