A series of di-nuclear metal acetate complexes 1–6 incorporated by nitrogen heterocycle-containing salen-type ligands have been synthesized, structurally characterized and performed as catalysts to prepare biodegradable polycarbonates and polyesters. Their catalytic performances for copolymerization of carbon dioxide-epoxides or cyclic anhydride-epoxides were systematically examined. Bimetallic nickel(II) complexes 1, 2 and 5 were active catalysts for the alternating copolymerization of cyclohexene oxide (CHO) with CO₂; di-nickel complex 1 was shown to be the most effective and selective, leading to obtaining poly(cyclohexene carbonate)s with the best efficiency among them. Moreover, complex 1 was also found to be versatile for the ring-opening copolymerization of CO₂ with different cyclic epoxides to give the corresponding polycarbonates. Additionally, di-cobalt(II) analogs 3, 4 and 6 were efficient catalysts for the alternating copolymerization of CHO and phthalic anhydride (PA) under mild conditions. Based on the results of catalytic studies, complex 3 was demonstrated to be the most active one CHO-PA copolymerization, producing the polymeric products with a “controlled” manner involving controllable molecular weights and narrow polydispersity. Interestingly, Co complex 3 was also able to catalyze the copolymerization of PA with 4-vinyl-1,2-cyclohexene oxide to obtain the associated polyester with the vinyl functionality on the side chains, which was further functionalized with tertiary amine moieties via thiol-ene click functionalization and converted to nanofibers through electrospinning. Due to the incorporation of polar groups, the resulting tertiary amine-modified polyester nanofibers that exhibit an improved hydrophilic property relative to their un-modified counterpart have been considered to have high potential to be utilized as a new functional fiber material.

一系列二核金属配合物乙酸酯的1 - 6通过萨伦基型配体的氮含杂环的结合已被合成，结构特点和作为催化剂以制备可生物降解的聚碳酸酯和聚酯进行。系统地研究了它们对二氧化碳-环氧化合物或环酐-环氧化合物共聚的催化性能。双金属镍（II）配合物1，2和5是用于氧化环己烯（CHO）与CO的交替共聚的活性催化剂₂ ; 双镍络合物1被证明是最有效和最有选择性的，从而获得了其中效率最高的聚（碳酸环己烯）酯。此外，还发现配合物1对于CO ₂与不同的环状环氧化物的开环共聚以得到相应的聚碳酸酯是通用的。此外，二-钴（II）类似物3，4和6分别为CHO的温和条件下交替共聚和邻苯二甲酸酐（PA）的有效催化剂。根据催化研究的结果，络合物3被证明是最活跃的一种CHO-PA共聚反应，以“受控”方式生产聚合物产品，涉及可控制的分子量和窄的多分散性。有趣的是，Co配合物3还能够催化PA与4-乙烯基-1,2-环己烯氧化物的共聚反应，从而获得在侧链具有乙烯基官能团的缔合聚酯，该聚酯进一步通过叔胺部分通过硫醇-烯点击功能化并通过静电纺丝转化为纳米纤维。由于极性基团的引入，相对于未改性的对应物表现出改善的亲水性的叔胺改性的聚酯纳米纤维被认为具有用作新的功能性纤维材料的高潜力。