Zhong Yongliang, Feng Quanyou, Wang Xiaoqian, Chen Jia, Cai Wenjun, Tong Rong
Department of Chemical Engineering, Virginia Polytechnic Institute and State University, 635 Prices Fork Road, Blacksburg, Virginia 24061, United States.
Key Laboratory for Organic Electronics and Information Displays, Jiangsu Key Laboratory for Biosensors, Institute of Advanced Materials, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing University of Posts and Telecommunications, 9 Wenyuan Road, Nanjing, 210023, China.
ACS Macro Lett. 2020 Aug 18;9(8):1114-1118. doi: 10.1021/acsmacrolett.0c00364. Epub 2020 Jul 21.
Ring-opening polymerization is used to prepare polyesters with precisely controlled molecular weights, molecular weight distributions, and tacticities. Herein, we report a Co/Zn catalytic system that can be activated by an electrical current to mediate efficient ring-opening polymerization of enantiopure -carboxyanhydrides, allowing for the synthesis of isotactic functionalized polyesters with high molecular weights (>140 kDa) and narrow molecular weight distributions (/ < 1.1). We also demonstrate that these catalysts can be used for stereoselective ring-opening polymerization of racemic -carboxyanhydrides to synthesize syndiotactic or stereoblock copolymers with different glass transition temperatures compared with their atactic counterparts.
开环聚合用于制备具有精确控制的分子量、分子量分布和立构规整性的聚酯。在此，我们报道了一种钴/锌催化体系，该体系可通过电流激活，以介导对映体纯的α-羧基酸酐的高效开环聚合，从而能够合成具有高分子量（>140 kDa）和窄分子量分布（/ < 1.1）的全同立构功能化聚酯。我们还证明，这些催化剂可用于外消旋α-羧基酸酐的立体选择性开环聚合，以合成与其无规立构对应物相比具有不同玻璃化转变温度的间同立构或立体嵌段共聚物。
