Reaction of a model siderophore with Ni(II), Co(II) and Zn(II) in aqueous solution: Kinetics and spectroscopy
| Autor: | Rômulo A. Ando, Waleria P. Silva, Paulo Sérgio da Silva Santos, Wagner José Barreto |
|---|---|
| Rok vydání: | 2008 |
| Předmět: |
Substitution reaction
Aqueous solution Chemistry Iron Spectrum Analysis Inorganic chemistry Kinetics Siderophores Infrared spectroscopy Cobalt Biochemistry Endothermic process Inorganic Chemistry Metal Zinc symbols.namesake Nickel visual_art Organometallic Compounds visual_art.visual_art_medium symbols Physical chemistry Raman spectroscopy Spectroscopy |
| Zdroj: | Journal of Inorganic Biochemistry. 102:359-363 |
| ISSN: | 0162-0134 |
| DOI: | 10.1016/j.jinorgbio.2007.09.009 |
| Popis: | A spectroscopic study was performed showing that the [Fe(III)(L 2− ) 2 ] 1− (L 2− = dopacatecholate) complex reacts with Ni(II), Co(II) and Zn(II) in an aqueous solution containing S 2 O 3 2 - resulting in the soluble [M(L 1− ) 3 ] 1− (L 1− = dopasemiquinone; M = Ni(II), Co(II) or Zn(II) complex species. The Raman and IR spectra of the [CTA][M(L 1− ) 3 ] complexes, CTA = hexadecyltrimethylammonium cation, in the solid state were obtained. The kinetic constants for the metal substitution reactions were determined at four different temperatures, providing values for Δ H ≠ , Δ S ≠ and Δ G ≠ . The reactions were slow ( k = 10 −11 M s −1 ) and endothermic. The system investigated can be considered as a simplified model to explain some aspects of siderophore chemistry. |
| Databáze: | OpenAIRE |
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