Comparison of Co with Mn and Fe in LDH-hosted sulfonato-salen catalysts for olefin epoxidation

Samiran Bhattacharjee, Trevor. J. Dines, James A. Anderson

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    44 Citations (Scopus)

    Abstract

    Sulphonato-salen complexes containing Mn(III), Co(III), and Fe(III) metal centers intercalated into Zn/Al layered double-hydroxide (LDH) host have been synthesized and tested as catalysts for the epoxidation of cyclohexene and dicyclopentadiene Using pivaldehyde and Molecular oxygen at atmospheric pressure and room temperature. Oxidation of cyclohexene gave cyclohexene oxide and 2-cyclohexen-1-one as reaction products, whereas dicyclopentadiene was transformed to the cot-responding monoepoxide. Selectivity was found to depend on the central metal ion. Activity (TOF) increased according to LDH-[Fe(Cl)(salen)] < LDH-[Co(Cl)(salen)] < LDH-[Mn(Cl)(salen)] in both case of cyclohexene and dicyclopentadiene epoxidation. The structures of the metal(III) sulfonato-salen complexes were modeled by density functional theory calculations in order to compare differences in dimensions and geometries with differences in gallery height and catalytic behavior.

    Original languageEnglish
    Pages (from-to)14124-14130
    Number of pages7
    JournalJournal of Physical Chemistry C
    Volume112
    Issue number36
    DOIs
    Publication statusPublished - 11 Sep 2008

    Keywords

    • HYDROGEN-PEROXIDE
    • ASYMMETRIC EPOXIDATION
    • SELECTIVE EPOXIDATION
    • MESOPOROUS MATERIALS
    • ALLYLIC ALCOHOLS
    • COMPLEXES
    • OXIDATION
    • CYCLOHEXENE
    • ALKENES
    • DERIVATIVES

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