Effects of Polymer Support on the Substrate Selectivity of Covalently Immobilized Ultrafine Rhodium Particles as a Catalyst for Olefin Hydrogenation

Michitaka Ohtak, Makoto Komiyama, Hidefumi Hirai, Naoki Toshima

Research output: Contribution to journalArticle

46 Citations (Scopus)

Abstract

Ultrafine rhodium particles prepared by alcohol reduction in the presence of a protective polymer were covalently immobilized onto a cross-linked polymer support by forming the amide bond between the primary amino group contained in the support and the methyl acrylate residue in the protective polymer of the particles. Catalytic activity of the immobilized particles was investigated in catalytic hydrogenation of olefins. The activity strongly depended on the substrates used in the reactions. The immobilized ultrafine rhodium particles preferentially hydrogenated hydrophilic substrates. In particular, the substrates containing a carboxyl group were hydrogenated by the immobilized catalyst more easily than by the dispersed catalyst of the ultrafine rhodium particles before the immobilization. The difference in the hydrogenation rates can be correlated with the solubility parameter of the substrates. Electrostatic interaction between the substrates and the polymer support leads to increased reaction rates.

Original languageEnglish
Pages (from-to)5567-5572
Number of pages6
JournalMacromolecules
Volume24
Issue number20
DOIs
Publication statusPublished - Sep 1 1991
Externally publishedYes

All Science Journal Classification (ASJC) codes

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

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