氮杂环卡宾铂炔基吡啶为供体的环金属配合物自组装及其磷光性质研究

环金属配合物因其易组装，结构新颖，应用广泛等特点而备受研究者关注。随着对环金属配合物研究的深入，其研究方向由探索新颖分子结构而逐渐转向对其分子识别、化学催化、电化学、化学发光、传感器以及聚合材料等功能性质的研究。最近荧光环金属配合物的自组装及性质研究取得了很大进展，荧光产率提高到81.6%，但是对在有机发光二极管中有重要作用的磷光环金属配合物的研究却有待于进一步加强。本课题拟利用具有高效磷光性能的顺反异构化合物(NHC)2Pt(C≡C-Py)2为供体，同节点受体自组装合成具有协同发光效应的四边形和六边形磷光环金属配合物，研究顺反供体和环金属配合物的磷光性质（磷光发射，磷光寿命及量子产率），并探讨供体和环金属配合物的发光机理。本项目利用磷光金属化合物为供体，同节点受体自组装具有协同效应的磷光环金属配合物对配位自组装研究具有重要的研究价值及意义，同时本研究也为磷光材料的开发提供了一条有效途径。

The research of metallacycles are attracting consistent attention for their features of easy assembly, unique structures and multi-functions. With the development of research, the studies for metallacycles are changing from previous crystal structures to the applications of molecular recognition, catalysis, electrochemistry, light-emitting materials, sensors, and polymer materials. The recent report of fluorescent metallacycle with quantum yield of 81.6% is a great breakthrough for light-emitting coordination-driven self-assembled metallacycles. However, the studies for phosphorescent materials, especially for phosphorescent metallacycles which play an important role in organic light emitting diodes are still not attracting as much attention as fluorescent metallacycles. In this project we are going to adopt phosphorescent cis and trans (NHC)2Pt(C≡C-Py)2 (NHC: N-heterocyclic carbene; Py: pyridine) organometallic compounds as donor motifs, associated with node acceptors to assemble high emissive square and hexagonal phosphorescent metallacycles. Furthermore, the photophysical properties (emission, lifetime, and quantum yield) will be studied for both donor motifs and metallacycles along with their light emitting mechanism. This project utilizing phosphorescent donor motifs to assemble metallacycles is significantly important for the study of coordination-driven self-assembled metallacycles and also provides a feasible solution for preparing phosphorescent materials.