Characterization of Cu(II)-ACC complexes and conversion of the bound ACC into ethylene in the presence of hydrogen peroxide. Detection of a brown intermediate at low temperature

Wadih Ghattas, Michel Giorgi, Christian Gaudin, Antal Rockenbauer, Marius Réglier, A. Jalila Simaan

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Two copper(II)-ACC complexes were prepared and characterized: [Cu(bpy)(ACC)( H2 O)]· CO 4 (1) and [Cu (ACC) 2 ] 3 · 4H2 O (2). Their crystallographic structures are described and analyzed. Spectroscopic characterizations (UV-visible and EPR) confirm that the structure is maintained in solution. These complexes are able to produce ethylene in the presence of hydrogen peroxide in an "ACC Oxidase-like" reaction in water and in methanol. The conversion of ACC into ethylene depends on the amount of base, and, in methanol, 3 equivalents of NaOH are needed for optimum activity. The base is proposed to play a role in H2 O2 deprotonation. The presence of an exogenic ligand (bpy) is important for the reactivity and may stabilize a reaction intermediate. Indeed, a brown intermediate with an absorption band centered at 433 nm can be detected at low temperature when 1 is treated with 10 equivalents of H2 O2.

Original languageEnglish
Article number43424
JournalBioinorganic Chemistry and Applications
Volume2007
DOIs
Publication statusPublished - 2007

ASJC Scopus subject areas

  • Biochemistry
  • Organic Chemistry
  • Inorganic Chemistry

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