Electrochemical and spectral studies on the reductive nitrosylation of water-soluble iron porphyrin

被引：32

作者：

Trofimova, NS ^{[1
]}

Safronov, AY

Ikeda, O

机构：

[1] Kanazawa Univ, Fac Sci, Dept Chem, Kanazawa, Ishikawa 9201192, Japan

[2] Irkutsk State Univ, Irkutsk 664003, Russia

来源：

INORGANIC CHEMISTRY | 2003年 / 42卷 / 06期

关键词：

D O I：

10.1021/ic025830n

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The reaction of iron(III) (meso-tetrakis(N-methylpyridinium-4-yl)porphyrin ((FeTMPyP)-T-III) 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. (FeTMPyP)-T-III 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.

引用

页码：1945 / 1951

页数：7

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