Selective oxidation of thioanisole with hydrogen peroxide using copper complexes encapsulated in zeolite: Formation of a thermally stable and reactive copper hydroperoxo species

Syuhei Yamaguchi, Akinori Suzuki, Makoto Togawa, Maiko Nishibori, Hidenori Yahiro

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)

Abstract

[Cu(terpy)]2+ complexes encapsulated into Na-Y zeolite ([Cu(terpy)]2+@Y) were prepared, and their catalytic activities for the oxidation of sulfides using hydrogen peroxide were investigated. Several spectroscopic results, as well as elemental analysis, demonstrated the formation of [Cu(terpy)]2+ complexes in supercages of Y-zeolite. [Cu(terpy)]2+@Y exhibited high selectivity for the oxidation of thioanisole into methylphenylsulfoxide when H2O2 was used. The kinetic study of this oxidation at the catalyst [Cu(terpy)]2+@Y suggests that the reaction of [Cu(terpy)]2+ species with H2O2 is the rate-determining step. The oxidation of thioanisole, benzene, and 2-phenylethylamine using [[Cu(terpy)]2+@Y]∗, which was prepared from the reaction between [Cu(terpy)]2+@Y and H2O2, quantitatively proceeded to methylphenylsulfoxide, phenol, and 2-amino-1-phenylethanol, respectively. The reaction of [Cu(terpy)]2+@Y and H2O2 was found to yield thermally stable but active CuII-OOH species in [Cu(terpy)]2+@Y.

Original languageEnglish
Pages (from-to)2645-2650
Number of pages6
JournalACS Catalysis
Volume8
Issue number4
DOIs
Publication statusPublished - Apr 6 2018

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Chemistry(all)

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