Highly Excited Vibrational States of Cyclic Molecules Investigated by I.C.L.A Spectroscopy With Photoacoustic Detection

Lespade, L.; Rodin, S.; Cavagnat, D.; Abbate, Sergio

doi:10.1051/jp4:19917136

Cited by 3 publications

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“…The vapor-phase spectra of the higher overtones corresponding to the region = 5 and 6 were measured with our intracavity dye laser photoacoustic spectrometer. 19 A Coherent Innova 70 Ar+ laser was used to pump a Coherent 599-01 dye laser with the following dyes: 2-pyridine (12900-14000 cm-1) and DCM (14500-16000 cm-1). A stainless steel photoacoustic cell was placed inside the dye laser cavity.…”

Section: Resultsmentioning

confidence: 99%

Large intramolecular energy flow in vibrational overtone spectra of cyclohexene-3,3,6,6-d4

Lespade¹,

Rodin²,

Cavagnat³

et al. 1993

J. Phys. Chem.

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The vibrational structure of CH stretching states in gas-phase cyclohexene-3,3,6,6-d4 was studied using FTIR spectroscopy in the range 1200-1 1500 cm-1 and intracavity dye laser photoacoustic spectrometry in the range 12900-16000 cm-l. The structure was modeled using an effective vibrational Hamiltonian which describes the Fermi resonance couplings of the C H stretching states with suitable low-frequency vibrations. Some conclusions are made on the possible ways of intramolecular vibrational redistribution of the energy (IVR) on the two methylenic groups for wavenumbers below 1 1 000 cm-I in connection with the existence of near-infrared circular dichroism in monoterpenes.

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Section: Resultsmentioning

confidence: 99%

Large intramolecular energy flow in vibrational overtone spectra of cyclohexene-3,3,6,6-d4

Lespade¹,

Rodin²,

Cavagnat³

et al. 1993

J. Phys. Chem.

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“…The visible spectra (∆V ) 5,6) were recorded with the intracavity photoacoustic spectrometer which has been described elsewhere. 15 The pump laser is a 4 W Ar ion laser (Coherent Innova 70), chopped at 85 Hz. The photoacoustic cell is placed inside the cavity of a linear Coherent 599 dye laser.…”

Section: Methodsmentioning

confidence: 99%

High Vibrational State Energy Redistribution in Two Deuterated Cyclopentenes

2000

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The high CH bond stretching vibrational states spectra (from Δv = 1 to 6) are presented for two isotopomers of cyclopentene: cyclopentene-1,2,3,4,4,5,5-d 7 and cyclopentene-4,4,5,5-d 4. They are analyzed simultaneously with a model Hamiltonian expressed in internal curvilinear coordinates. Because of the size of the molecules, only the CH2 or CHD chromophore is considered in the calculations (two bond stretches and five angle deformations). The results show a reasonable agreement between the experimental and calculated spectra for the two molecules with the use of the same anharmonic potential.

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“…31 The pump laser is a 4 W Ar ion laser (Coherent Innova 70), chopped at 85 Hz. The photoacoustic cell is placed inside the cavity of a linear Coherent 599 dye laser.…”

Section: Methodsmentioning

confidence: 99%

“…The visible spectra (∆V ) 5-6) were recorded with the intracavity photoacoustic spectrometer which has been described elsewhere. 31 The pump laser is a 4 W Ar ion laser (Coherent Innova 70), chopped at 85 Hz. The photoacoustic cell is placed inside the cavity of a linear Coherent 599 dye laser.…”

Section: Methodsmentioning

confidence: 99%

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Ring Puckering and CH Stretching Spectra. 3. High Vibrational States of Gaseous Monohydrogenated Cyclopentene-4-h₁

1997

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The excited CH stretching vibrational states of gaseous cyclopentene (4-HC 5 D 7 ) have been measured from ∆V ) 3 to ∆V ) 6. Overtone spectra are modified by the large-amplitude ring-puckering motion and by a rapid energy flow to combination states. These two types of couplings with the CH stretching vibrations are explicitly modeled. The reconstruction of the spectra gives the predominant pathways of the intramolecular vibrational redistribution of the energy.

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Highly Excited Vibrational States of Cyclic Molecules Investigated by I.C.L.A Spectroscopy With Photoacoustic Detection

Cited by 3 publications

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Large intramolecular energy flow in vibrational overtone spectra of cyclohexene-3,3,6,6-d4

Large intramolecular energy flow in vibrational overtone spectra of cyclohexene-3,3,6,6-d4

High Vibrational State Energy Redistribution in Two Deuterated Cyclopentenes

Ring Puckering and CH Stretching Spectra. 3. High Vibrational States of Gaseous Monohydrogenated Cyclopentene-4-h₁

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Highly Excited Vibrational States of Cyclic Molecules Investigated by I.C.L.A Spectroscopy With Photoacoustic Detection

Cited by 3 publications

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Large intramolecular energy flow in vibrational overtone spectra of cyclohexene-3,3,6,6-d4

Large intramolecular energy flow in vibrational overtone spectra of cyclohexene-3,3,6,6-d4

High Vibrational State Energy Redistribution in Two Deuterated Cyclopentenes

Ring Puckering and CH Stretching Spectra. 3. High Vibrational States of Gaseous Monohydrogenated Cyclopentene-4-h1

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Ring Puckering and CH Stretching Spectra. 3. High Vibrational States of Gaseous Monohydrogenated Cyclopentene-4-h₁