A catalytic activity of glass beads, silica gels and anion-exchange resins modified with metal-porphines in oxidative reactions of ascorbic acid

Akimasa Iwado, Masaki Mifune, Rumiko Harada, Hiromichi Akizawa, Noriko Motohashi, Yutaka Saito

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

An anion-exchange resin was modified with metal-tetrakis(4-sulfophenyl)porphine (M-TSPP) by ion-exchange reaction and physical adsorption, and silica gels and glass beads were modified by using the acid chloride of metal-tetrakis(4-carboxyphenyl)porphine (M-TCPP) through the peptide bond. The supports modified with Co3+-porphine were proved to accelerate the following redox reaction(s), of which the former is also catalyzed by ascorbate-oxidase (AsA): ASOx or supports modified with M-porphine 2 Ascorbate (AsA) +O2 → 2 Dehydroascorbate (DhAsA) +2H2O supports modified with M-porphine Ascorbate (AsA) +O2 → Dehydroascorbate (DhAsA) +H2O2 Formation of DhAsA and hydrogen peroxide was confirmed by means of mass spectroscopy and colored reaction, respectively. The supports modified with Co3+-porphine would be useful in practice as solid catalysts for the determination of AsA and for the removal of AsA which interferes with the determination of vital materials in clinical assays.

Original languageEnglish
Pages (from-to)44-50
Number of pages7
JournalInorganica Chimica Acta
Volume283
Issue number1
DOIs
Publication statusPublished - Dec 1 1998

Keywords

  • Anion exchange
  • Ascorbic acid
  • Glass beads
  • Metal-porphines
  • Modified resins
  • Oxidative reactions
  • Silica gels

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

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