Mid-Infrared Diode Laser Spectroscopy of X̃1A′ HC35Cl

Bor Chen Chang; Ruian Fei; Trevor J. Sears

doi:10.1006/jmsp.1997.7291

Mid-Infrared Diode Laser Spectroscopy of X̃¹A′ HC³⁵Cl

Bor Chen Chang
, Ruian Fei
, Trevor J. Sears

Department of Chemistry

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

30 Scopus citations

Abstract

The observation of the C-Cl stretching fundamental of HC³⁵Cl in its ground X̃ ¹A′' state is reported. HCCl was formed in a continuous flow system by the excimer laser photolysis of CHBr₂Cl at 193 nm and the transient absorption recorded by infrared diode laser spectroscopy. The band has a-type character and the fundamental vibrational frequency is found to be 811.5963 cm^-1. No evidence was found for perturbations in either the ground or vibrationally excited states, implying that the excited triplet ̃³A″ states lies above the C-Cl stretching level in HCCl. The observed rotation-vibration transitions were well fit by a standard asymmetric rotor Hamiltonian. There is a decrease in the A rotational constant on vibrational excitation, suggesting that some bend-C-Cl stretch coupling is present.

Original language	English
Pages (from-to)	341-346
Number of pages	6
Journal	Journal of molecular spectroscopy
Volume	183
Issue number	2
DOIs	https://doi.org/10.1006/jmsp.1997.7291
State	Published - Jun 1997

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@article{2d00b5d220cc42d3a0be05dad34b9dd7,

title = "Mid-Infrared Diode Laser Spectroscopy of {\~X}1A′ HC35Cl",

abstract = "The observation of the C-Cl stretching fundamental of HC35Cl in its ground {\~X} 1A′' state is reported. HCCl was formed in a continuous flow system by the excimer laser photolysis of CHBr2Cl at 193 nm and the transient absorption recorded by infrared diode laser spectroscopy. The band has a-type character and the fundamental vibrational frequency is found to be 811.5963 cm-1. No evidence was found for perturbations in either the ground or vibrationally excited states, implying that the excited triplet{\~ }3A″ states lies above the C-Cl stretching level in HCCl. The observed rotation-vibration transitions were well fit by a standard asymmetric rotor Hamiltonian. There is a decrease in the A rotational constant on vibrational excitation, suggesting that some bend-C-Cl stretch coupling is present.",

author = "Chang, \{Bor Chen\} and Ruian Fei and Sears, \{Trevor J.\}",

note = "Funding Information: We thank an anonymous referee for pointing out the existence of reference (16) and for making several other useful suggestions. This work was carried out under Contract DE-AC02-76CH00016 with the U. S. Department of Energy and supported by its Division of Chemical Sciences, Office of Basic Energy Sciences. BCC also thanks the National Science Council, Taiwan for its support of this work.",

year = "1997",

month = jun,

doi = "10.1006/jmsp.1997.7291",

language = "???core.languages.en\_GB???",

volume = "183",

pages = "341--346",

journal = "Journal of molecular spectroscopy",

issn = "0022-2852",

number = "2",

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TY - JOUR

T1 - Mid-Infrared Diode Laser Spectroscopy of X̃1A′ HC35Cl

AU - Chang, Bor Chen

AU - Fei, Ruian

AU - Sears, Trevor J.

N1 - Funding Information: We thank an anonymous referee for pointing out the existence of reference (16) and for making several other useful suggestions. This work was carried out under Contract DE-AC02-76CH00016 with the U. S. Department of Energy and supported by its Division of Chemical Sciences, Office of Basic Energy Sciences. BCC also thanks the National Science Council, Taiwan for its support of this work.

PY - 1997/6

Y1 - 1997/6

N2 - The observation of the C-Cl stretching fundamental of HC35Cl in its ground X̃ 1A′' state is reported. HCCl was formed in a continuous flow system by the excimer laser photolysis of CHBr2Cl at 193 nm and the transient absorption recorded by infrared diode laser spectroscopy. The band has a-type character and the fundamental vibrational frequency is found to be 811.5963 cm-1. No evidence was found for perturbations in either the ground or vibrationally excited states, implying that the excited triplet ̃3A″ states lies above the C-Cl stretching level in HCCl. The observed rotation-vibration transitions were well fit by a standard asymmetric rotor Hamiltonian. There is a decrease in the A rotational constant on vibrational excitation, suggesting that some bend-C-Cl stretch coupling is present.

AB - The observation of the C-Cl stretching fundamental of HC35Cl in its ground X̃ 1A′' state is reported. HCCl was formed in a continuous flow system by the excimer laser photolysis of CHBr2Cl at 193 nm and the transient absorption recorded by infrared diode laser spectroscopy. The band has a-type character and the fundamental vibrational frequency is found to be 811.5963 cm-1. No evidence was found for perturbations in either the ground or vibrationally excited states, implying that the excited triplet ̃3A″ states lies above the C-Cl stretching level in HCCl. The observed rotation-vibration transitions were well fit by a standard asymmetric rotor Hamiltonian. There is a decrease in the A rotational constant on vibrational excitation, suggesting that some bend-C-Cl stretch coupling is present.

UR - https://www.scopus.com/pages/publications/0001450088

U2 - 10.1006/jmsp.1997.7291

DO - 10.1006/jmsp.1997.7291

M3 - 期刊論文

AN - SCOPUS:0001450088

SN - 0022-2852

VL - 183

SP - 341

EP - 346

JO - Journal of molecular spectroscopy

JF - Journal of molecular spectroscopy

IS - 2

ER -

Mid-Infrared Diode Laser Spectroscopy of X̃1A′ HC35Cl

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Mid-Infrared Diode Laser Spectroscopy of X̃¹A′ HC³⁵Cl