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Narrowly Distributed Homotelechelic Polymers in 30 Minutes: Using Fast In Situ Pre-functionalized ROMP Initiators

Type of publication Peer-reviewed
Publikationsform Original article (peer-reviewed)
Publication date 2013
Author Nils Hanik, Andreas F. M. Kilbinger,
Project Functional Living Olefin Metathesis Polymers: Methodology Development and Applications
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Original article (peer-reviewed)

Journal Journal of Polymer Science A
Volume (Issue) 51(19)
Page(s) 4183 - 4190
Title of proceedings Journal of Polymer Science A
DOI 10.1002/pola.26832

Abstract

Today’s olefin metathesis catalysts show high reactivity, selectivity, and functional group tolerance, and allow the design of new syntheses of precisely functionalized polymers. Here we describe a general “one-pot” synthesis for narrow polydispersity bis-end-functional (5homotelechelic) ROMP polymers exploiting the propagating ruthenium complex inherent selectivity for strained norbornenes over acyclic internal olefins. This approach represents a straightforward general method of homotelechelic polymers carrying almost any functional end group (within the limitations of the catalyst’s functionality tolerance). Complete pre-functionalization of the initiator is realized in situ within minutes and without the need of further purification steps. The excess acyclic olefin re-enters the catalytic cycle after monomer consumption is complete giving a homotelechelic polymer. 1H NMR spectroscopic and MALDI-ToF-MS analysis show highly efficient end group functionalization.
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