Cation–π interactions enabling hard/soft Ti/Ag heterobimetallic cooperativity in lactide ring-opening polymerisation

Abstract

The combination of a Ti-salen complex with AgBArF reveals unique hard/soft heterobimetallic cooperativity in lactide ring-opening polymerisation (ROP), enabling significant activity at room temperature. Reactivity, mechanistic and computational studies highlight...

(Bipyridine bisphenolate)-aluminum/onium salt pair: a highly active binary catalyst for ring-opening polymerization of lactide with improved thermostability and protic tolerance

“…In addition, the ONNO tetradentate structure in the salen-type ligand reduces the possibility of ligand exchange, which is beneficial for improving the stability of the catalyst. 19,[46][47][48][49][50][51][52][53][54][55] These features are important advantages for the development of a catalyst system that can be fine-tuned and potentially employed on an industrial scale. The pioneering studies in 1996 by Spassky reported that the (salen)Al complex with a large sterically hindered o-naphthalene bridged group could catalyze the ROP of LA to produce PLA with a high molar mass and narrow dispersity.…”