Dendritic metallophthalocyanines - Synthesis, electrochemical properties, and catalytic activities

Mutsumi Kimura, Yasuji Sugihara, Tsuyoshi Muto, Kenji Hanabusa, Hirofusa Shirai, Nagao Kobayashi

Research output: Contribution to journalArticlepeer-review

82 Citations (Scopus)

Abstract

A new class of sterically hindered dendritic phthalocyanines was synthesized to evaluate the effects of the dendritic structure on the electrochemical properties and catalytic activities. This dendritic phthalocyanine possesses a well-defined structure which has a nanosized, three-dimensional shape. The dendritic structure around the cobalt phthalocyanine prevented the molecular aggregation among phthalocyanine moieties in polar solvents and thin films. Electrochemical studies indicated that the electron-transfer process was hindered in the dendritic cobalt phthalocyanine. This is the result of a shielding effect by the dendrimer branch on the cobalt phthalocyanine core. Thiol oxidation catalyzed by the dendritic cobalt phthalocyanine was carried out in the presence of dioxygen. A high stability of the catalytic site was observed for the dendritic cobalt phthalocyanine.

Original languageEnglish
Pages (from-to)3495-3500
Number of pages6
JournalChemistry - A European Journal
Volume5
Issue number12
Publication statusPublished - 1999 Dec 1

Keywords

  • Catalysis
  • Cyclic voltammetry
  • Dendrimers
  • Metallodendrimers
  • Phthalocyanines

ASJC Scopus subject areas

  • Catalysis
  • Organic Chemistry

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