基于稀土发光的光化学长余辉材料及其应用研究

长余辉发光材料因其停止激发后仍能持续发光的独特性质而引起了广泛的研究关注，其中基于稀土掺杂的无机长余辉晶体在长余辉亮度方面显示出压倒性的优势。然而，由于其晶体特征导致溶液可加工性能差，且存在形貌尺寸与长余辉亮度之间需要权衡的挑战性难题，导致其在生物光子学领域的应用严重受限。本项目拟通过光化学反应调控发光寿命的策略，直接构建在均相有机溶液中具有稀土本征发射的长余辉发光体系。经过分子剪裁与体系设计，可实现对颜色、寿命、亮度等长余辉发光参数的可控调节。基于稀土发光的光化学长余辉材料整合了稀土发光和长余辉发光的优势，且能通过可控的溶液合成实现前所未有的长余辉材料可加工性能，将为生物光子学相关研究提供新的思路和技术手段。

The applications of afterglow materials have gained increased attention due to their splendid superiorities in long persistent luminescence (lifetime >100 ms). In terms of the afterglow brightness, lanthanide-doped persistent phosphors have shown overwhelming advantages over other luminescence materials. However, owing to the crystalline nature of existed afterglow materials, it is a crucial challenge to achieve high afterglow efficiency at the attractive nanoscale or even smaller non-particulate state. To address the above-mentioned challenge, this project will focus on the synthesis of afterglow materials exhibiting persistent lanthanide luminescence directly in homogeneous organic solvents. By taking advantage of molecular tailoring and systemic design, the manipulation of color, luminescence lifetime, and brightness can be realized. The photochemical afterglow materials with intrinsic lanthanide luminescence will pave the way in designing and fabricating biophotonics tools with functionalities which are not accessible before.