Controlled Pd(0)/ t -Bu 3P-catalyzed suzuki cross-coupling polymerization of AB-type monomers with PhPd(t -Bu 3P)I or Pd 2(dba) 3/ t -Bu 3P/ArI as the initiator

Hong Hai Zhang, Chun Hui Xing, Qiao Sheng Hu

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87 Scopus citations

Abstract

Controlled Pd(0)/t-Bu 3P-catalyzed Suzuki cross-coupling polymerizations of AB-type monomers via the chain-growth mechanism with an ArPd(t-Bu 3P)I complex as the initiator are described. ArPd(t-Bu 3P)I complexes, either prepurified or generated in situ from Pd 2(dba) 3/t-Bu 3P/ArI (dba = dibenzylideneacetone) without separation/purification, were found to be efficient initiators in general for the controlled Suzuki cross-coupling polymerization, with narrow polydispersity indexes (PDIs) of 1.13-1.35 being observed. The Pd 2(dba) 3/t-Bu 3P/p-BrC 6H 4I combination was identified as a highly robust initiator system, with PDIs of ≤1.20 in general and as low as 1.13 being obtained. Higher number-average molecular weights (M n) were achieved without a significant increase in the PDI (from 1.14 for a polymer with a M n = 9500 to 1.20 for a polymer with M n = 31 400) by using a smaller amount of the Pd 2(dba) 3/t-Bu 3P/p-BrC 6H 4I initiator in the polymerization.

Original languageEnglish
Pages (from-to)13156-13159
Number of pages4
JournalJournal of the American Chemical Society
Volume134
Issue number32
DOIs
StatePublished - Aug 15 2012
Externally publishedYes

Funding

FundersFunder number
National Science Foundation0911533

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