Authors Tkachov, R. ; Senkovskyy, V. ; Beryozkina, T. ; Boyko, K. ; Bakulev, V. ; Lederer, A. ; Sahre, K. ; Voit, B. ; Kiriy, A.
Title Palladium-catalyzed chain-growth polycondensation AB-type monomers: High catalyst turnover and polymerization rates
Date 24.02.2014
Number 41924
Abstract Chain-growth catalyst-transfer polycondensations of AB-type monomers is a new and rapidly developing tool for the preparation of well-defined p-conjugated (semiconducting) polymers for various optoelectronic applications. Herein, we report the Pd/PtBu3-catalyzed Negishi chain-growth polycondensation of AB-type monomers, which proceeds with unprecedented TONs of above 100·000 and TOFs of up to 280 s-1. In contrast, related AA/BB-type step-growth polycondensation proceeds with two orders of magnitude lower TONs and TOFs. A similar trend was observed in Suzuki-type polycondensation. The key impact of the intramolecular (vs. intermolecular) catalyst-transfer process on both polymerization kinetics and catalyst lifetime has been revealed.
Publisher Angewandte Chemie
Citation Angewandte Chemie 126 (2014) 2434-2439
Tags homogene katalyse chain growth conjugated polymers palladium polycondensation

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