Raman analysis of SF6 molecular beams excited by a cw CO2 laser

Luijks, G.; Timmerman, J.; Stolte, S.; Reuß, J.

doi:10.1016/0301-0104(83)85074-5

Cited by 31 publications

(5 citation statements)

References 18 publications

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“…The experimental setup has already been described before [6,7]. It consists of an Ar+ laser (Spectra Physics, model 2030-15S) from which the output mirror is removed and replaced by two highly reflect ing curved mirrors (R = 50 mm, R = 100 m m ), placed adjustably inside the high-pressure sample cell.…”

Section: Methodsmentioning

confidence: 99%

Torsional motion of the CH3 groups of propane studied by Raman overtone spectroscopy

et al. 1990

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The Ram an spectrum of propane is recorded between 300 and 900 c m -1; first and third overtones are observed with an A r+ laser intracavity setup. This spectrum is analyzed by means of a model with two hindered and coupled methyl rotors. Since the levels probed extend to the region above the torsional barrier ( V3= 1353 c m -1), all the relevant molecular parameters, in partic ular the coupling between the methyl rotors, could be accurately determined. By means of a classical approach we have obtained further insight into the qualitative structure of the torsional spectrum.

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Section: Methodsmentioning

confidence: 99%

Torsional motion of the CH3 groups of propane studied by Raman overtone spectroscopy

et al. 1990

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“…The higher the vibrational temperature and the lower the wavenumber, the larger the intensity. For gas-phase spectra, the vibrational temperature is well known, but in supersonic jets, different vibrations cool with different efficiency [19,20].…”

Section: Error Due To Vibrational Temperaturementioning

confidence: 99%

Quantifying Conformational Isomerism in Chain Molecules by Linear Raman Spectroscopy: The Case of Methyl Esters

Gawrilow

Suhm

2021

Molecules

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The conformational preferences of the ester group have the potential to facilitate the large amplitude folding of long alkyl chains in the gas phase. They are monitored by Raman spectroscopy in supersonic jet expansions for the model system methyl butanoate, after establishing a quantitative relationship with quantum–chemical predictions for methyl methanoate. This requires a careful analysis of experimental details, and a simulation of the rovibrational contours for near-symmetric top molecules. The technique is shown to be complementary to microwave spectroscopy in quantifying coexisting conformations. It confirms that a C−O−C(=O)−C−C chain segment can be collapsed into a single all-trans conformation by collisional cooling, whereas alkyl chain isomerism beyond this five-membered chain largely survives the jet expansion. This sets the stage for the investigation of linear alkyl alkanoates in terms of dispersion-induced stretched-chain to hairpin transitions by Raman spectroscopy.

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“…As discussed in ref. (18), in a jet SF6 relaxation pathways are density-and temperature-controlled. At low jet temperatures the available energy does not suffice anymore to furnish the energy deficit of ca.…”

Section: N ( E ) Ae = ( / C T ) -~E Exp ( -E / K T ) a E = (Kt)-*e A ...mentioning

confidence: 98%

Pumping and fishing

Veeken¹,

Dam²,

Reuß³

1986

J. Chem. Soc., Faraday Trans. 2

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Raman analysis of SF6 molecular beams excited by a cw CO2 laser

Cited by 31 publications

References 18 publications

Torsional motion of the CH3 groups of propane studied by Raman overtone spectroscopy

Torsional motion of the CH3 groups of propane studied by Raman overtone spectroscopy

Quantifying Conformational Isomerism in Chain Molecules by Linear Raman Spectroscopy: The Case of Methyl Esters

Pumping and fishing

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