Ring-opening copolymerization (ROCOP) of epoxides with anhydrides presents a highly promising pathway for the synthesis of diverse polyester copolymers. This process involves the simultaneous opening of the epoxide ring and the anhydride ring, resulting in the formation of copolymer chains with alternating repeating units. Here, we synthesized a series of nickel and copper complexes coordinated by amine-bis(benzotriazole phenolate) ligands (^C1NNBiBTP-H₂). Different acid–base conditions can result in the synthesis of diverse coordination structures. The six-coordinated mononuclear Ni catalyst synthesized in this study exhibited competitive turnover frequencies (TOF = 450 h^–1) compared to previous studies involving copolymerization of epoxides with anhydrides. This indicates the catalyst’s high activity in facilitating the copolymerization reaction. The results indicate that the catalyst exhibited a high molecular weight control ability and high polymer selectivity for the ROCOP of epoxides and anhydrides. Thus, this air-stable catalyst has the potential for use in industries.

中文翻译：

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用于环氧化物与酸酐共聚的高活性和高选择性空气稳定镍和铜配合物

环氧化物与酸酐的开环共聚（ROCOP）为合成各种聚酯共聚物提供了一种非常有前景的途径。该过程涉及环氧化物环和酸酐环的同时打开，从而形成具有交替重复单元的共聚物链。在这里，我们合成了一系列由胺-双（苯并三唑酚盐）配体（^{C 1 NN} BiBTP-H ₂）配位的镍和铜配合物。不同的酸碱条件可以导致不同配位结构的合成。与之前涉及环氧化物与酸酐共聚的研究相比，本研究中合成的六配位单核镍催化剂表现出有竞争力的周转频率（TOF = 450 h ^{–1 ）。}这表明催化剂在促进共聚反应方面具有高活性。结果表明，该催化剂对环氧化物和酸酐的ROCOP表现出高分子量控制能力和高聚合物选择性。因此，这种空气稳定性催化剂具有在工业中使用的潜力。