Fermi resonance in condensed CF4 and CCl4

Abramowitz, Stanley; Comeford, J. J.

doi:10.1016/0371-1951(65)80060-1

Cited by 23 publications

(10 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…1(a) shows the IR spectrum of a 13 CCl 4 /H 2 O (ice) film deposited on a Au mirror at 103 K. The spectrum is dominated by a broad feature between 3600 and 3000 cm À1 associated with the O-H stretching mode of adsorbed H 2 O and the 13 CCl 4 Fermi doublet comprising the n 3 stretching mode at 780 cm À1 and the n 1 + n 4 combination mode at 758 cm À1 . 40 The negative absorbance seen at 939 cm À1 has been previously identified as an optical interference effect caused by the thickness of the CCl 4 /H 2 O films employed in the present investigation, estimated to be >300 A ˚.36,41 It should be noted that in the present investigation 13 CCl 4 was used in RAIR experiments to avoid interference from 12 CO 2 background adsorption.…”

Section: Methodsmentioning

confidence: 55%

Effect of chemical composition on the neutral reaction products produced during electron beam irradiation of carbon tetrachloride/water (ice) films

Wagner

Vecitis

Wolfe

et al. 2002

Phys. Chem. Chem. Phys.

View full text Add to dashboard Cite

The neutral reaction products formed during electron beam irradiation of carbon tetrachloride/water (ice) films have been studied as a function of the film's initial CCl 4 : H 2 O ratio using a combination of reflection absorption infrared spectroscopy, mass spectrometry and X-ray photoelectron spectroscopy. When the initial CCl 4 : H 2 O ratio was high, the dominant reaction products in the film were C 2 Cl 4 and a partially chlorinated carbonaceous film (CCl x ) formed as the result of carbon-carbon coupling reactions in the film. In these CCl 4 rich films, chlorine is partitioned mainly into the gas phase while CO is the dominant carbon-containing gas phase species. As the CCl 4 : H 2 O ratio decreases, CO 2 becomes an increasingly important reaction product at the expense of species generated from carbon-carbon coupling reactions, while chlorine is increasingly partitioned as HCl in the film, producing H 3 O + and Cl À . The production of both H 2 and O 2 from electron stimulated reactions associated with H 2 O are suppressed in CCl 4 /H 2 O films, although oxygen is more efficiently quenched in the presence of CCl 4 .

show abstract

Section: Methodsmentioning

confidence: 55%

Effect of chemical composition on the neutral reaction products produced during electron beam irradiation of carbon tetrachloride/water (ice) films

Wagner

Vecitis

Wolfe

et al. 2002

Phys. Chem. Chem. Phys.

View full text Add to dashboard Cite

show abstract

“…The weak doublet structure around 770 cm-1 is known from frequency-domain Raman scattering to be due to a Fermi resonance between vs and V\ + v4. 37 The doublet splitting is about 24 cm-1. This value is well in excess of the spectral resolution of the scan, which is determined by the number of equally spaced time steps (1064) per total scan time (4 ps), in this case 0.24 THz or equivalently 8 cm-1.…”

Section: Xyyzz^d^wmentioning

confidence: 96%

Transient Grating Optical Heterodyne Detected Impulsive Stimulated Raman Scattering in Simple Liquids

Vöhringer¹,

Scherer²

1995

J. Phys. Chem.

166

151

View full text Add to dashboard Cite

The real and imaginary parts of individual tensor elements of the nonresonant third-order nonlinear optical susceptibility of simple liquids, carbon tetrachloride and benzene, have been characterized for the first time by transient grating optical heterodyne detected impulsive stimulated Raman scattering (TG-OHD-ISRS). Optical heterodyning is achieved through additional scattering induced by a thermal grating. Vibrational modes to 1000 cm-I are impulsively prepared and probed using 15 fs laser pulses. This technique allows for a precise determination of frequencies and dephasing times of intramolecular Raman-active vibrations. It is shown that the symmetry of these modes defines the measured phase of the oscillatory modulations of the various linearly detected tensor components of ~(~' ( t ) .Advantages to conventional techniques, such as optical heterodyne detected Raman induced Ken effect spectroscopy or homodyne detected impulsive stimulated Raman scattering, are demonstrated. Further detection of the real or imaginary part of the susceptibilities using phase locked femtosecond optical pulses is discussed.

show abstract

“…This band was thought to be due to ν 3 , but further analysis was impossible on the grounds that its Raman intensity was too low even if Fermi resonance and similar effects were considered [29]. The final assignments of the Raman spectrum of XY 4 -type tetrahedral TiCl 4 in the liquid are indicated in Figure 2, and the numerical results are listed in Table 1.…”

Section: Vibrational Modes Of Ticl 4 Liquidmentioning

confidence: 99%

The Local Structure of Liquid TiCl4 Analyzed by X-Ray Diffraction and Raman Spectroscopy

Iwadate

Ohkubo

2013

Zeitschrift Für Naturforschung A

View full text Add to dashboard Cite

Structural analyses were performed to determine the local structure of liquid TiCl 4 using laboratory-scale X-ray diffraction and Raman spectroscopy from which the existence of tetrahedral TiCl 4 molecules in the liquid was definitely confirmed. Conventionally, in molten salts, the valence increase of the central metal ion, for example in the range from 1 to 3, leads to more complicated liquid structures, yet a further increase in valence is usually accompanied by an enhanced covalency, forming stable tetrahedral molecules like e. g. CCl 4 . We discuss the intermolecular structure of TiCl 4 liquid as well as the intramolecular one.

show abstract

Fermi resonance in condensed CF4 and CCl4

Cited by 23 publications

References 11 publications

Effect of chemical composition on the neutral reaction products produced during electron beam irradiation of carbon tetrachloride/water (ice) films

Effect of chemical composition on the neutral reaction products produced during electron beam irradiation of carbon tetrachloride/water (ice) films

Transient Grating Optical Heterodyne Detected Impulsive Stimulated Raman Scattering in Simple Liquids

The Local Structure of Liquid TiCl4 Analyzed by X-Ray Diffraction and Raman Spectroscopy

Contact Info

Product

Resources

About