Photoreduction of iron(III) tetraphenylporphyrin in ethanol studied by laser flash photolysis: effects of concentration on quantum yields
- 1 January 1992
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Faraday Transactions
- Vol. 88 (3) , 405-408
- https://doi.org/10.1039/ft9928800405
Abstract
Chloroiron(III) tetraphenylporphyrin, CIFeIIITPP, in deaerated ethanol is photoreduced to yield iron(II) tetraphenylporphyrin, FeIITPP, upon irradiation with UV light. The 355 nm laser photolysis studies have confirmed that the initial yields for the formation of FeIITPP are markedly decreased with an increase in the concentration of CIFeIIITPP: ϕ= 0.015 at 5.35 × 10–6 mol dm–3 CIFeIIITPP and ϕ= 0.01 at 1.0 × 10–4 mol dm–3 CIFeIIITPP. The effects of the concentration on the quantum yields were interpreted in terms of the formation of photoreactive iron(III) porphyrin at low concentrations of CIFeIIITPP.Keywords
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