中国科学院长春应用化学研究所王献红团队报道了调控聚碳酸酯骨架结构的具有分散分布活性中心的聚合物催化剂。相关研究成果发表在2024年7月3日出版的《中国化学》。

将二氧化碳转化为有价值的化学品是缓解环境压力和石油资源枯竭的有效手段。其中，由PO和CO₂共聚得到的聚合物因其优异的性能而被广泛研究。为了满足CO₂基聚合物应用范围的扩大，聚合物中CU的调节势在必行。

在理解催化剂协同作用与结构关系的基础上，研究人员设计了新一代活性中心离散分布的聚酯基聚合物催化剂APEPC-R和RPEPC-N，以实现具有调节CU（从50%到90%）的CO₂基聚合物的合成。通过¹H NMR和UV-vis表征证明了催化剂活性中心的离散排列。利用多位点协同作用，成功合成了含铜量在50%-90%之间的高分子量（Mn>100kg/mol）CO₂基共聚物，并首次对其性能进行了研究。

该项工作不仅有助于丰富CO₂基共聚物的应用范围，而且为新一代催化剂的开发提供了新的平台。

附：英文原文

Title: Polymeric Catalyst with Discrete Distributed Active Centers for Regulating Backbone Structure of Poly(propylene carbonate)†

Author: Hao Zhou, Shunjie Liu, Pei Chen, Liehang Yang, Chunwei Zhuo, Fengxiang Gao, Xuan Pang, Xuesi Chen, Xianhong Wang

Issue&Volume: 2024-07-03

Abstract: Converting CO2 into valuable chemicals is an effective means to alleviate environmental pressure and the depletion of oil resources. Among them, polymers derived from the copolymerization of PO and CO2 have been widely studied because of their excellent properties. To meet the expansion of the application range of CO2-based polymers, regulation of the CU in the polymer is imperative. Based on the understanding of the relationship between catalyst synergy and structure, we designed a new generation of polyester-based polymeric catalysts APEPC-R and RPEPC-N with discretely distributed active centers to achieve the synthesis of CO2-based polymers with regulated CU (from 50% to 90%). The discrete arrangement of catalyst active centers was demonstrated by 1H NMR and UV-vis characterization. Benefiting from multi-site synergy, high molecular weight (Mn >100 kg/mol) CO2-based copolymers with CU among 50%—90% were successfully synthesized and their properties were firstly investigated. This work not only contributes to enriching the scope of the application of CO2-based copolymers but also provides a new platform for the development of a new generation of catalysts.

DOI: 10.1002/cjoc.202400398

Source: https://onlinelibrary.wiley.com/doi/full/10.1002/cjoc.202400398