Quantum yield determinations on the [Co(EDTA)] - ·I - system

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Abstract

Spectrophotometric measurements were performed to calculate the association constant K for the Co(EDTA) - ·I - adduct. It is only possible to obtain the product ε{lunate} ip K (ε{lunate} ip is the molar absorptivity of the adduct). Nevertheless, these data allow us to calculate the quantum yield for the production of I 3 - and Co(EDTA) 2- on irradiation of solutions containing K[Co(EDTA)] and NaI based on the light absorbed by the adduct. In this work we also verified the presence of a reverse photochemical reaction which produces I - and Co(EDTA) - . Photochemical results obtained on addition of small amounts of sulphite to avoid the reverse photochemical reaction and the inner filter effect are also described.

Original languageEnglish
Pages (from-to)233-242
Number of pages10
JournalJournal of Photochemistry and Photobiology, A: Chemistry
Volume48
Issue number2-3
DOIs
Publication statusPublished - 1 Jan 1989

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