Electrochemical and Spectral Studies on the Reductive Nitrosylation of Water-Soluble Iron Porphyrin

Autor:	and Alexander Y. Safronov, Osamu Ikeda, Natalia S. Trofimova
Rok vydání:	2003
Předmět:	Inorganic Chemistry chemistry.chemical_compound Aqueous solution Water soluble chemistry Absorption spectroscopy Nitric oxide binding Nitrosylation Physical and Theoretical Chemistry Photochemistry Electrochemistry Porphyrin Nitric oxide
Zdroj:	Inorganic Chemistry. 42:1945-1951
ISSN:	1520-510X 0020-1669
DOI:	10.1021/ic025830n
Popis:	The reaction of iron(III) (meso-tetrakis(N-methylpyridinium-4-yl)porphyrin (Fe(III)TMPyP) with nitric oxide (NO) was studied by electronic absorption spectroscopy, ESR, and electrochemical and spectroelectrochemical techniques in aqueous solutions with pH from 2.2 to 12.0. Fe(III)TMPyP has been found to undergo a reductive nitrosylation in all pHs, and the product of nitric oxide binding to the porphyrin has been determined as iron(II) porphyrin nitrosyl complex ([Fe(II)(NO)TMPyP]). The rate of the reductive nitrosylation exhibits a tendency to get faster with increase in pH. An intermediate species was observed around neutral pH by spectroelectrochemical technique and was proposed to be the iron(II) nitrosyl complex of the mu-oxo dimeric form of FeTMPyP, which is known to be a predominant in neutral solutions.
Databáze:	OpenAIRE
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