Ring-Opening Polymerization of L-Lactides Catalyzed by Zinc–Sodium/Lithium Heterobimetallic Complexes in the Presence of Water

摘要

Two heterobimetallic complexes, [(TBBP)2Zn][(Na)2(THF)4] (3) and [(TBBP)2Zn][(Li)2(THF)4] (4) can initiate the ringopening polymerization of L-lactide in a controlled fashion. Complex 3 can initiate the ring-opening polymerization of unsublimed L-lactide under moist conditions even in the presence of H2O, to yield a high conversion and with controllablemolecular weight.