配合物磷光聚集诱导发光（Aggregation-Induced Emission，AIE）机理过多沿袭传统有机荧光AIE机理，对新型配合物磷光AIE分子的设计合成及相关应用造成严重制约。在对配合物磷光AIE机理研究及其在有机电致发光领域应用所面临的困境和亟待解决问题的系统梳理之上，本项目利用平面4配位Pt(II)配合物骨架从基态平面构型到激发态四面体构型转变（D2d形变）这一特性，发展基于激发态配位骨架D2d形变受阻的磷光AIE新机理，并结合功能化的分子设计合成新型2-苯基吡啶类平面4配位Pt(II)配合物磷光AIE分子，突破配合物磷光AIE分子在电致发光领域应用遇到的瓶颈。在此基础之上，深入探讨基于此磷光AIE新机理的配合物磷光AIE行为、电致发光性能与其结构间的构-效关系规律。本研究不仅为配合物磷光AIE分子设计提供新理论依据，而且对高效磷光AIE电致发光材料的开发也具有重要应用价值。

In traditional phosphorescent complexes with aggregation-induced emission (AIE) features, the phosphorescent AIE mechanisms involved are typically derived from the ones working in the organic fluorescent AIEgens. Obviously, it will set serious restrictions on the design and synthesis novel phosphorescent AIEgens as well as their application. Based on the systematic analysis of the predicaments and pressing problems in both the mechanism investigation of phosphorescent AIEgens and their application in organic electroluminescent field, the novel phosphorescent AIE mechanism has been established based on restraining the D2d distortion of coordinating skeleton in excited states of four-coordinated planar Pt(II) complexes. Based on this new phosphorescent AIE mechanism and combining with functional notion of molecular design, novel phosphorescent AIEgens of the ppy-type Pt(II) complexes with planar four-coordinated configuration have been developed to cope with the problems faced by the traditional phosphorescent AIEgens for their application in organic light-emitting diodes (OLEDs). Furthermore, the relationship between chemical structures of these ppy-type Pt(II) phosphorescent AIEgens and their AIE behaviors as well as their electroluminescent properties will be explored in depth. This research project not only can provide new theoretical basis for the design of novel phosphorescent AIEgens, but also shows great importance for developing highly efficient phosphorescent AIEgens for the application in electroluminescent field.