Functional metallomacrocycles and their polymers: 34. Kinetics and mechanism of the biomimetic decomposition of hydrogen peroxide catalysed by heterogeneous octacarboxyphthalocyaninato iron(III) supported on amorphous enriched rayon staple fibres

Hisanaga Tsuiki, Etsuko Masuda, Toshiki Koyama, Kenji Hanabusa, Hirofusa Shirai, Nagao Kobayashi, Naoki Minamide, Yoshito Komatsu, Tokuji Yokozeki

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Catalase-like decomposition of hydrogen peroxide with the octacarboxy-phthalocyaninatoiron(III) (Fe(III)-oapc) supported on amorphous enriched rayon staple fibre (degree of crystallinity = 14%) was studied in aqueous solution at pH 7.0 and 25°C. The Fe(III)-oapc supported on the rayon staple fibre is remarkably effective as an immobilized catalyst for decomposition of hydrogen peroxide. The reaction rate was analysed in terms of Michaelis-Menten kinetics, which suggests that the catalysed decomposition of hydrogen peroxide proceeds via the formation of an activated complex. Iron atom distribution of the rayon staple fibre indicated that Fe(III)-oapc existed on the fibre homogeneously. Electronic and e.s.r. spectra of the fibre suggests monomeric Fe(III)-oapc with a distorted rhombic coordinating high spin iron(III) ion. Fe(III)-oapc is considered to be immobilized by hydrogen bonding between carboxylic groups on Fe(III)-oapc and hydroxy groups of cellulose, and a weak coordination bonding of iron with hydroxy groups on cellulose. The immobilization of Fe-oapc to the rayon staple fibre extends its catalytic lifetime and makes the catalyst molecule the monomeric active state.

Original languageEnglish
Pages (from-to)3637-3642
Number of pages6
JournalPolymer
Volume37
Issue number16
DOIs
Publication statusPublished - 1996 Aug

Keywords

  • Catalase-like decomposition
  • Hydrogen peroxide
  • Michaelis-Menten kinetic
  • Octacarboxy-phthalocyaninatoiron (III)
  • Rayon staple fibre

ASJC Scopus subject areas

  • Organic Chemistry
  • Polymers and Plastics
  • Materials Chemistry

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