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On the mechanism of the photoinduced reduction of an adduct of ferricytochrome C with a poly(4-vinylpyridine) polymer containing –ReI (CO)3(3,4,7,8-tetramethyl-1,10-phenanthroline) pendants

Paper ID Volume ID Publish Year Pages File Format Full-Text
27225 44010 2009 9 PDF Available
Title
On the mechanism of the photoinduced reduction of an adduct of ferricytochrome C with a poly(4-vinylpyridine) polymer containing –ReI (CO)3(3,4,7,8-tetramethyl-1,10-phenanthroline) pendants
Abstract

Changes in the UV–vis absorption spectrum revealed the formation of adducts between the ReI polymer and ferricytochrome C, FeIII-Cyt c. Different morphologies for the ReI polymer and the adducts formed between the ReI polymer and FeIII-Cyt c were observed by TEM. The reduction of the ReI chromophores in the polymer, achieved by the reductive quenching of the MLCT excited state of the ReI polymer by triethylamine (TEA) and/or by the reaction between e−solv and {[(vpy)2vpyReI(CO)3(tmphen)+]}n∼200 in pulse radiolysis experiments, produces –ReI(CO)3(tmphen) and –ReI(CO)3(tmphenH)+ as the main species. The reductive quenching of the MLCT of the ReI polymer by TEA was followed by a rapid electron transfer from the –ReI(CO)3(tmphen) to the FeIII center in the heme to produce ferrocytochrome C, FeII-Cyt c.

Keywords
Cytochrome c; Rhenium; Polymers; Photoinduced; MLCT; TEA
First Page Preview
On the mechanism of the photoinduced reduction of an adduct of ferricytochrome C with a poly(4-vinylpyridine) polymer containing –ReI (CO)3(3,4,7,8-tetramethyl-1,10-phenanthroline) pendants
Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 208, Issue 1, 15 November 2009, Pages 50–58
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering