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

Fernando Pina; Júlia C. Costa

doi:10.1016/1010-6030(89)87004-2

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

Fernando Pina, Júlia C. Costa

DQ - Departamento de Química

Research output: Contribution to journal › Article

7 Citations (Scopus)

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 language	English
Pages (from-to)	233-242
Number of pages	10
Journal	Journal of Photochemistry and Photobiology, A: Chemistry
Volume	48
Issue number	2-3
DOIs	https://doi.org/10.1016/1010-6030(89)87004-2
Publication status	Published - 1 Jan 1989

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Pina, F., & Costa, J. C. (1989). Quantum yield determinations on the [Co(EDTA)] ^- ·I ^- system. Journal of Photochemistry and Photobiology, A: Chemistry, 48(2-3), 233-242. https://doi.org/10.1016/1010-6030(89)87004-2

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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.",

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N2 - 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.

AB - 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.

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