Radiative lifetime and quenching of the Ã2A1 state of the CH3O radical

Shiaw Ruey Lin; Yuan-Pern Lee; J. B. Nee

doi:10.1063/1.454633

Radiative lifetime and quenching of the Ã²A₁ state of the CH₃O radical

Shiaw Ruey Lin^*, Yuan-Pern Lee, J. B. Nee

^*Corresponding author for this work

Department of Applied Chemistry

Research output: Contribution to journal › Article › peer-review

19 Scopus citations

Abstract

The laser-induced fluorescence technique has been employed to study the first excited electronic stated Ã²A₁ of CH ₃O. Vibrational levels v′₃ = 0-7 of the Ã state were excited and fluorescence decay rates were measured. Compared to a value 2.2 ± 0.2 μs at V′₃ = 0, a significant decrease of decay rate was found at 277.6 nm (0.89 μs, v′₃ = 7). Excitation to higher levels further reduced the lifetime. The predissociation threshold was estimated to be slightly above 276 nm (36 220 cm^-1). The electronic quenching rates of the Ã state (v′ = 0-2) by CH ₃OH, O₂, NO₂, and N₂ have also been determined and are compared with those of OH in the Ã state.

Original language	English
Pages (from-to)	171-175
Number of pages	5
Journal	The Journal of chemical physics
Volume	88
Issue number	1
DOIs	https://doi.org/10.1063/1.454633
State	Published - 1988

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@article{1066c4b52fdd4745b63400d0e7197dad,

title = "Radiative lifetime and quenching of the {\~A}2A1 state of the CH3O radical",

abstract = "The laser-induced fluorescence technique has been employed to study the first excited electronic stated {\~A}2A1 of CH 3O. Vibrational levels v′3 = 0-7 of the {\~A} state were excited and fluorescence decay rates were measured. Compared to a value 2.2 ± 0.2 μs at V′3 = 0, a significant decrease of decay rate was found at 277.6 nm (0.89 μs, v′3 = 7). Excitation to higher levels further reduced the lifetime. The predissociation threshold was estimated to be slightly above 276 nm (36 220 cm-1). The electronic quenching rates of the {\~A} state (v′ = 0-2) by CH 3OH, O2, NO2, and N2 have also been determined and are compared with those of OH in the {\~A} state.",

author = "Lin, {Shiaw Ruey} and Yuan-Pern Lee and Nee, {J. B.}",

year = "1988",

doi = "10.1063/1.454633",

language = "English",

volume = "88",

pages = "171--175",

journal = "The Journal of chemical physics",

issn = "0021-9606",

publisher = "American Institute of Physics",

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}

TY - JOUR

T1 - Radiative lifetime and quenching of the Ã2A1 state of the CH3O radical

AU - Lin, Shiaw Ruey

AU - Lee, Yuan-Pern

AU - Nee, J. B.

PY - 1988

Y1 - 1988

N2 - The laser-induced fluorescence technique has been employed to study the first excited electronic stated Ã2A1 of CH 3O. Vibrational levels v′3 = 0-7 of the Ã state were excited and fluorescence decay rates were measured. Compared to a value 2.2 ± 0.2 μs at V′3 = 0, a significant decrease of decay rate was found at 277.6 nm (0.89 μs, v′3 = 7). Excitation to higher levels further reduced the lifetime. The predissociation threshold was estimated to be slightly above 276 nm (36 220 cm-1). The electronic quenching rates of the Ã state (v′ = 0-2) by CH 3OH, O2, NO2, and N2 have also been determined and are compared with those of OH in the Ã state.

AB - The laser-induced fluorescence technique has been employed to study the first excited electronic stated Ã2A1 of CH 3O. Vibrational levels v′3 = 0-7 of the Ã state were excited and fluorescence decay rates were measured. Compared to a value 2.2 ± 0.2 μs at V′3 = 0, a significant decrease of decay rate was found at 277.6 nm (0.89 μs, v′3 = 7). Excitation to higher levels further reduced the lifetime. The predissociation threshold was estimated to be slightly above 276 nm (36 220 cm-1). The electronic quenching rates of the Ã state (v′ = 0-2) by CH 3OH, O2, NO2, and N2 have also been determined and are compared with those of OH in the Ã state.

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U2 - 10.1063/1.454633

DO - 10.1063/1.454633

M3 - Article

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SN - 0021-9606

VL - 88

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EP - 175

JO - The Journal of chemical physics

JF - The Journal of chemical physics

IS - 1

ER -

Radiative lifetime and quenching of the Ã²A₁ state of the CH₃O radical

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