University of British Columbia, Department of Chemistry, 2036 Main Mall, Vancouver, BC, Canada.
Chem Commun (Camb). 2019 Mar 14;55(23):3347-3350. doi: 10.1039/c8cc08858f.
We report the first example of discrete cationic indium complexes for the copolymerization of epoxides, cyclic ethers, and lactide. [SalenIn][SbF6] in particular proved to be a highly active catalyst for the homo-polymerization of functionalized epoxides and their copolymerization with other cyclic ethers THF, oxetane and oxepane. This catalyst also proved competent in the polymerization of epichlorohydrin and lactide, forming copolymers with good activity and control. Investigation of the role of counteranions and solvent donors on the kinetics of polymerization of epoxides revealed a subtle effect of solvents on initiation rates.
我们报告了第一个用于环氧化物、环醚和丙交酯共聚的离散阳离子铟配合物的例子。特别是[SalenIn][SbF6]被证明是一种非常有效的催化剂，可用于功能化环氧化物的均聚及其与其他环醚 THF、环氧乙烷和环氧丙烷的共聚。该催化剂还可用于环氧氯丙烷和丙交酯的聚合，形成具有良好活性和控制的共聚物。对反离子和溶剂供体在环氧化物聚合动力学中的作用的研究表明，溶剂对引发速率有微妙的影响。
