Recoverable reusable polyisobutylene (PIB)-Bound ruthenium bipyridine (Ru(PIB-bpy)3Cl2) photoredox polymerization catalysts

Nilusha Priyadarshani, Yannan Liang, Jakkrit Suriboot, Hassan S. Bazzi, David E. Bergbreiter

Research output: Contribution to journalArticle

36 Citations (Scopus)


Polyisobutylene (PIB)-bound ruthenium bipyridine [Ru(PIB-bpy) 3]2+ metal complexes were prepared from PIB ligands formed by alkylation of 4,4′-dimethylbipyridine with polyisobutylene bromide. The product Ru(PIB-bpy)3Cl2 complexes with at least one PIB ligand per bipyridine unit function as soluble recyclable photoredox catalysts in free radical polymerization of acrylate monomers under visible light irradiation at 25 C with ethyl 2-bromoisobutyrate as the initiator in the presence of diisopropylethylamine. The polyacrylate products contained only about 1 ppm Ru contamination. This PIB-bound catalyst was recyclable and showed about 50-fold less Ru leaching as compared to Ru leaching in a polymerization catalyzed by the low molecular weight Ru catalyst, Ru(bpy)3(PF 6)2.

Original languageEnglish
Pages (from-to)571-574
Number of pages4
JournalACS Macro Letters
Issue number7
Publication statusPublished - 2013


ASJC Scopus subject areas

  • Polymers and Plastics
  • Organic Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

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