Robust porphyrin catalysts immobilized on biogenous iron oxide for the repetitive conversions of epoxides and CO2 into cyclic carbonates

Tadashi Ema, Yuki Miyazaki, Tomoya Taniguchi, Jun Takada

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Metalloporphyrins were immobilized on biogenous iron oxide (BIO) produced by iron-oxidizing bacteria, Leptothrix ochracea. These organic-inorganic hybrid materials were used as immobilized catalysts for the synthesis of cyclic carbonates from epoxides and CO2 under solvent-free conditions. ZnII porphyrin immobilized via four tetraalkylammonium bromide groups showed high catalytic activity and reusability at a catalyst loading of 0.1 mol%. The product was obtained in 99% yield after nine times reuse, and the substrate scope was broad.

Original languageEnglish
Pages (from-to)2485-2492
Number of pages8
JournalGreen Chemistry
Issue number9
Publication statusPublished - Sep 1 2013


ASJC Scopus subject areas

  • Environmental Chemistry
  • Pollution

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