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, A. 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

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Hydrogen Peroxide
Methanol
Reaction intermediates
Deprotonation
Temperature
Carbon Monoxide
Paramagnetic resonance
Copper
Absorption spectra
Ligands
Water
ethylene
1-aminocyclopropane-1-carboxylic acid oxidase

ASJC Scopus subject areas

  • Inorganic Chemistry
  • Organic Chemistry
  • Biochemistry

Cite this

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

In: Bioinorganic Chemistry and Applications, Vol. 2007, 43424, 2007.

Research output: Contribution to journalArticle

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AU - Ghattas, Wadih

AU - Giorgi, Michel

AU - Gaudin, Christian

AU - Rockenbauer, A.

AU - Réglier, Marius

AU - Simaan, A. Jalila

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N2 - 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.

AB - 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.

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