基于AIE配体双光子吸收配合物的可控合成、构效关系及应用

项目名称： 基于AIE配体双光子吸收配合物的可控合成、构效关系及应用

项目编号： No.21271003

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 数理科学和化学

项目作者： 周虹屏

作者单位： 安徽大学

项目金额： 78万元

中文摘要： 目前聚集诱导发光(AIE)的研究主要集中于单光子荧光材料，而对双光子材料中弱键与聚集导致的分子内变化、聚集态结构的改变、分子内的π电子流动间关系的研究甚少，其机理不完善、规律不明确。基于AIE配体，能否高效、简捷制备且具有强双光子吸收特点的配合物，实现目标物的可控合成并筛选有应用价值的材料是目前该领域的挑战。本项目拟以氮杂冠醚为母体构筑AIE配体，并将其与功能无机组分组装。调节配体构成、利用弱键形成有益于AIE且性能增强的材料，筛选出结构新颖、制备可控、且在光限幅、激光上转换及生物显影等方面有实用价值的材料。在课题研究中将立足于材料的微观结构中弱键和双光子吸收间的内在关系，利用单晶X-ray衍射仪和可调谐超快速激光光谱技术，结合量子化学计算重点探讨材料中弱键及其协同效应对聚集态结构、双光子吸收效应的作用，以期解决材料中光效应增强、发光波段可控和低成本制备等关键问题。

中文关键词： 配体；弱键；双光子吸收；聚集诱导发光；构效关系

英文摘要： Recently, the aggregation-induced emission (AIE) are mainly focused on the single-photon fluorescent materials. While very few research is reported on the two-photon fluorescent materials for AIE as the mechanism is not well understood, such as the relations between weak bond and molecular changes caused by aggregation, the changes of aggregated structure and the fluxion of π electrons. The big challenge in this field is to propose an effective and convenient approach to synthesize the desired complexes with strong two-photon absorption based on AIE ligand. The project intends to assemble the AIE ligand, using aza-crown ether as a parent, with functional inorganic components. The materials with novel structure and controlled synthesis can be acquired by regulating the AIE ligand structure and utilizing the weak bonds, and can be applied in a wide field of applications due to their excellent properties, such as optical limiting, up-conversion lasing and biological imaging. In order to enhance the optical effects of materials and to easily control the luminescence band in a low-cost manner, we will focus on internal relation between weak bond of microstructure and two-photon absorption effect, utilizing single crystal X-ray diffraction and tunable ultra-fast laser spectroscopy, in a combination with quantum chemi

英文关键词： ligand；weak bond；two-photon absorption；aggregation-induced emission；structure-activity relationship