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Issue 42, 2012
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Photo-induced oxidation of [FeII(N4Py)CH3CN] and related complexes

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The photochemistry of the complexes [Fe(N4Py)(CH3CN)](ClO4)2 (1), where N4Py is 1,1-di(pyridin-2-yl)-N,N-bis(pyridin-2-ylmethyl)methanamine and [Fe(MeN4Py)(CH3CN)](ClO4)2 (2), where MeN4Py is 1,1-di(pyridin-2-yl)-N,N-bis(pyridin-2-ylmethyl)ethanamine, in water, dichloromethane and methanol is described. Under UV or visible irradiation both 1 and 2 undergo enhancement of the rate of outer sphere electron transfer to 3O2 to yield the superoxide radical anion and the complexes in the Fe(III) redox state. Addition of ascorbic acid to the photoproduct leads to a recovery of the initial UV/Vis spectrum of 1 and 2, indicating that ligand oxidation does not occur. The results are discussed within the context of the recent report of the enhancement of the oxidative DNA cleavage activity of 1 under UV and visible irradiation (Inorg. Chem. 2010, 49, 11009).

Graphical abstract: Photo-induced oxidation of [FeII(N4Py)CH3CN] and related complexes

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The article was received on 19 Feb 2012, accepted on 22 Mar 2012 and first published on 23 Mar 2012

Article type: Paper
DOI: 10.1039/C2DT30392B
Dalton Trans., 2012,41, 13180-13190

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    Photo-induced oxidation of [FeII(N4Py)CH3CN] and related complexes

    A. Draksharapu, Q. Li, G. Roelfes and W. R. Browne, Dalton Trans., 2012, 41, 13180
    DOI: 10.1039/C2DT30392B

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