Seungho Kim, Jennifer J. Jackiw, E. Robinson
Jan 27, 1998
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Influential Citations
81
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Quality indicators
Journal
Macromolecules
Abstract
Water soluble poly(p-phenylene) derivatives, poly[2,5-bis(3-sulfonatopropoxy)-1,4-phenylene-alt-1,4-phenylene] sodium salt (PPP−OPSO3) and poly[2,5-bis(3-sulfonatopropoxy)-1,4-phenylene-alt-4,4‘-biphenylene] sodium salt (PPBP−OPSO3), have been synthesized through a Suzuki coupling reaction of 1,4-dibromo-2,5-bis(3-sulfonatopropoxy)benzene sodium salt with 1,4-phenylenediboronic acid or 4,4‘-biphenyldiyldiboronic acid 2,2‘-dimethylpropyl diester using a water soluble Pd(0) catalyst or Pd(OAc)2. The pH dependence of the coupling reaction was investigated and resulted in pH independence at pH levels greater than 10.0. End group analysis of PPP−OPSO3 via 1H NMR of tert-butyl end-capped polymers indicates degrees of polymerization in excess of 40 (ca. 80 rings per chain). Viscometric analysis of PPP−OPSO3 in water shows a behavior comparable to sodium poly(styrenesulfonate) (PSS) of molecular weight 8000. In addition, the polyelectrolyte effect is observed at low polymer concentrations. The λmax of the π → π* ...