烯烃（共轭二烯、α-烯烃）和非共轭二烯烃（1,5-己二烯、1,6-庚二烯等）的配位共聚合是烯烃聚合领域有待深入研究的重要课题。本项目致力于设计合成一系列二价阳离子型稀土金属催化剂，高活性、高选择性地促进烯烃和非共轭二烯烃的配位共聚合反应，获得具有多种微观结构、性能优异、可满足多种需求的高分子材料（如含有可功能化端烯的聚烯烃、环烯烃共聚物等）。深入考察催化剂结构与烯烃聚合的区域、立体选择性之间的关系，揭示催化剂结构和聚合物结构之间存在的内在规律；并在密度泛函（DFT）计算和实验基础上阐明烯烃和非共轭二烯烃配位共聚合反应的机理，为新型催化剂的设计开发提供新思路和理论依据。

The coordination copolymerization of olefin like conjugated diene, α-olefin with a nonconjugated diene such as 1,6-heptadiene, 1,5-hexadiene is an important subject in the field of olefin polymerization. The project focuses on the design and synthesis of a series of novel dicationic rare earth metal catalysts which can improve the coordination copolymerizaiton reaction with high activity and high selectivity, and produce various high-performance polyolefin products such as cycloolefin polymer and polymer containing terminal olefinic double bonds in the side chain. The project will reveal the internal rule between catalyst structures and polymer structures by in-depth studying the relationship between catalyst structures and regio(stereo)selective polymerization properties. Furthermor, the project will investigate the polymerization mechanism based on the DFT calculation and experiment, and will provide the opportunity for designing other new catalysts.