Infrared spectrum of mass-selected CH3S radicals investigated with infrared + vacuum ultraviolet photoionization

Hui Ling Han; Lung Fu; Yuan-Pern Lee

doi:10.1016/j.cplett.2011.06.090

Infrared spectrum of mass-selected CH₃S radicals investigated with infrared + vacuum ultraviolet photoionization

Hui Ling Han, Lung Fu, Yuan-Pern Lee^*

^*Corresponding author for this work

Department of Applied Chemistry

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

17 Scopus citations

Abstract

We present a detailed spectral study of the atmospherically important methylthio (CH₃S) radical demonstrating the advantage of IR-VUV photoionization for vibrational spectroscopy of free radicals due to its mass selectivity. Photolysis of CH₃SH produced CH₃S radicals that were ionized with (1 + 1) IR-VUV photoionization and detected with the time-of-flight technique. The IR spectrum of CH₃S was obtained in the range 2790-3270 cm^-1. Absorptions features near 2819 and 2904 cm^-1 are assigned to ν₁ and ν₄ modes of CH₃S, respectively, and those near 2978 and 3241 cm^-1 are tentatively assigned as combination transitions 3¹5¹6 ¹(e) and 3¹5¹6¹(a), respectively, from the ground vibrational state.

Original language	English
Pages (from-to)	1-6
Number of pages	6
Journal	Chemical Physics Letters
Volume	515
Issue number	1-3
DOIs	https://doi.org/10.1016/j.cplett.2011.06.090
State	Published - 17 Oct 2011

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10.1016/j.cplett.2011.06.090

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title = "Infrared spectrum of mass-selected CH3S radicals investigated with infrared + vacuum ultraviolet photoionization",

abstract = "We present a detailed spectral study of the atmospherically important methylthio (CH3S) radical demonstrating the advantage of IR-VUV photoionization for vibrational spectroscopy of free radicals due to its mass selectivity. Photolysis of CH3SH produced CH3S radicals that were ionized with (1 + 1) IR-VUV photoionization and detected with the time-of-flight technique. The IR spectrum of CH3S was obtained in the range 2790-3270 cm-1. Absorptions features near 2819 and 2904 cm-1 are assigned to ν1 and ν4 modes of CH3S, respectively, and those near 2978 and 3241 cm-1 are tentatively assigned as combination transitions 31516 1(e) and 315161(a), respectively, from the ground vibrational state.",

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doi = "10.1016/j.cplett.2011.06.090",

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T1 - Infrared spectrum of mass-selected CH3S radicals investigated with infrared + vacuum ultraviolet photoionization

AU - Han, Hui Ling

AU - Fu, Lung

AU - Lee, Yuan-Pern

PY - 2011/10/17

Y1 - 2011/10/17

N2 - We present a detailed spectral study of the atmospherically important methylthio (CH3S) radical demonstrating the advantage of IR-VUV photoionization for vibrational spectroscopy of free radicals due to its mass selectivity. Photolysis of CH3SH produced CH3S radicals that were ionized with (1 + 1) IR-VUV photoionization and detected with the time-of-flight technique. The IR spectrum of CH3S was obtained in the range 2790-3270 cm-1. Absorptions features near 2819 and 2904 cm-1 are assigned to ν1 and ν4 modes of CH3S, respectively, and those near 2978 and 3241 cm-1 are tentatively assigned as combination transitions 31516 1(e) and 315161(a), respectively, from the ground vibrational state.

AB - We present a detailed spectral study of the atmospherically important methylthio (CH3S) radical demonstrating the advantage of IR-VUV photoionization for vibrational spectroscopy of free radicals due to its mass selectivity. Photolysis of CH3SH produced CH3S radicals that were ionized with (1 + 1) IR-VUV photoionization and detected with the time-of-flight technique. The IR spectrum of CH3S was obtained in the range 2790-3270 cm-1. Absorptions features near 2819 and 2904 cm-1 are assigned to ν1 and ν4 modes of CH3S, respectively, and those near 2978 and 3241 cm-1 are tentatively assigned as combination transitions 31516 1(e) and 315161(a), respectively, from the ground vibrational state.

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DO - 10.1016/j.cplett.2011.06.090

M3 - Article

AN - SCOPUS:80053896949

SN - 0009-2614

VL - 515

SP - 1

EP - 6

JO - Chemical Physics Letters

JF - Chemical Physics Letters

IS - 1-3

ER -

Infrared spectrum of mass-selected CH₃S radicals investigated with infrared + vacuum ultraviolet photoionization

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