Photodissociation of sulfur dioxide: The Ẽ state revisited

Kenneth Knappenberger; A. W. Castleman

doi:10.1021/jp030786y

Photodissociation of sulfur dioxide: The Ẽ state revisited

Kenneth Knappenberger, A. W. Castleman

Chemistry

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22 Scopus citations

Abstract

The pump-probe technique has been employed to study the photodissociation processes of sulfur dioxide (SO₂). The SO₂⁺ transient has been fit to a biexponential with decay times of 230 ± 9 fs and 8 ± 4 ps. The growth of ³²SO⁺ was determined to be 225 ± 10 fs with a decay of 373 ± 27 fs. The response of the isotope ³⁴SO₂⁺ was also fit to biexponential decay with lifetimes of 195 ± 14 fs and 4 ± 1 ps. The decay of ³⁴SO⁺ was fit to 381 ± 30 fs. The results display that an inverse kinetic isotope effect is operative during dissociation of SO₂ through the Ẽ state.

Original language	English (US)
Pages (from-to)	9-14
Number of pages	6
Journal	Journal of Physical Chemistry A
Volume	108
Issue number	1
DOIs	https://doi.org/10.1021/jp030786y
State	Published - Jan 8 2004

All Science Journal Classification (ASJC) codes

Physical and Theoretical Chemistry

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title = "Photodissociation of sulfur dioxide: The Ẽ state revisited",

abstract = "The pump-probe technique has been employed to study the photodissociation processes of sulfur dioxide (SO2). The SO2+ transient has been fit to a biexponential with decay times of 230 ± 9 fs and 8 ± 4 ps. The growth of 32SO+ was determined to be 225 ± 10 fs with a decay of 373 ± 27 fs. The response of the isotope 34SO2+ was also fit to biexponential decay with lifetimes of 195 ± 14 fs and 4 ± 1 ps. The decay of 34SO+ was fit to 381 ± 30 fs. The results display that an inverse kinetic isotope effect is operative during dissociation of SO2 through the Ẽ state.",

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N2 - The pump-probe technique has been employed to study the photodissociation processes of sulfur dioxide (SO2). The SO2+ transient has been fit to a biexponential with decay times of 230 ± 9 fs and 8 ± 4 ps. The growth of 32SO+ was determined to be 225 ± 10 fs with a decay of 373 ± 27 fs. The response of the isotope 34SO2+ was also fit to biexponential decay with lifetimes of 195 ± 14 fs and 4 ± 1 ps. The decay of 34SO+ was fit to 381 ± 30 fs. The results display that an inverse kinetic isotope effect is operative during dissociation of SO2 through the Ẽ state.

AB - The pump-probe technique has been employed to study the photodissociation processes of sulfur dioxide (SO2). The SO2+ transient has been fit to a biexponential with decay times of 230 ± 9 fs and 8 ± 4 ps. The growth of 32SO+ was determined to be 225 ± 10 fs with a decay of 373 ± 27 fs. The response of the isotope 34SO2+ was also fit to biexponential decay with lifetimes of 195 ± 14 fs and 4 ± 1 ps. The decay of 34SO+ was fit to 381 ± 30 fs. The results display that an inverse kinetic isotope effect is operative during dissociation of SO2 through the Ẽ state.

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Photodissociation of sulfur dioxide: The Ẽ state revisited

Abstract

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