A series of novel quinolinyl imidazolidin-2-imine nickel complexes with different substituents on the imidazolidin-2-imine ligand were synthesized and characterized. The complexes in the presence of methylaluminoxane (MAO) as a cocatalyst catalyzed the copolymerization of norbornene (N) and styrene (S) or para-chlorostyrene (CS) with high activity (up to 1070 kg·mol⁻¹·h⁻¹). The installation of sterically bulky substituents on the imidazolidine-2-imine ligand was effective for the increase of the molecular weight and the comonomer content, affording high molecular weight copolymers with tunable CS content (0.57 mol%–11.7 mol%), in which the existence of Cl group can provide reaction site for the further functionalization of copolymers as well as the synthesis of graft or cross-linked polymers. The linear relationship between the comonomer content and the glass transition temperature of the copolymers and the monomer reactivity ratios in the copolymerization indicated the formation of the expected functionalized cyclic olefin copolymers (COC).

合成并表征了一系列新型的在咪唑烷基-2-亚胺配体上具有不同取代基的喹啉基咪唑烷基-2-亚胺镍配合物。在甲基铝氧烷（MAO）作为助催化剂存在下的络合物催化降冰片烯（N）与苯乙烯（S）或对氯苯乙烯（CS）的高活性（高达1070 kg·mol ^-1 ·h ^-1的共聚））。在咪唑烷-2-亚胺配体上安装空间较大的取代基可有效提高分子量和共聚单体含量，从而提供具有可调CS含量的高分子量共聚物（0.57 mol％–11.7 mol％），其中Cl基的存在可以为共聚物的进一步官能化以及接枝或交联聚合物的合成提供反应位点。共聚用单体的共聚单体含量和玻璃化转变温度之间的线性关系以及共聚中的单体反应比表明形成了预期的官能化环烯烃共聚物（COC）。