Raman Band Shapes and Molecular Reorientation

1972 ◽  
Vol 57 (4) ◽  
pp. 1795-1796 ◽  
Author(s):  
Stanislav Sýkora
Keyword(s):  
Raman Band ◽  
Molecular Reorientation

Raman Studies of Molecular Reorientation in Liquid Sulfur Hexafluoride

1974 ◽  
Vol 52 (13) ◽  
pp. 1209-1214 ◽  
Author(s):  
S. Sunder ◽  
R. E. D. McClung
Keyword(s):  
Sulfur Hexafluoride ◽  
Fourier Transforms ◽  
Raman Band ◽  
Rotational Diffusion ◽  
Diffusion Limit ◽  
Molecular Reorientation ◽  
Rotation Tensor ◽  
Liquid Sulfur ◽  
Correlation Times ◽  
Tensor Formula

The contour of the v2 Raman band of SF6 liquid has been studied over the temperature range 226–315 K. Reorientational and angular momentum correlation times were obtained by comparing the Fourier transforms of the band contours with the reorientational correlation functions calculated using the J diffusion limit of the extended rotational diffusion model. A reanalysis of Hackleman and Hubbard's nuclear relaxation data for liquid SF6, using the correlation times obtained from the Raman studies, yields the value ± 6.2 × 104 s−1 for the asymmetry in the spin–rotation tensor [Formula: see text] for fluorine nuclei in SF6.

Molecular reorientation of liquid trimethylchlorosilane from Raman band shape studies

1986 ◽  
Vol 17 (1) ◽  
pp. 65-69 ◽  
Author(s):  
Th. Steiger ◽  
K.-W. Brzezinka ◽  
P. Reich
Keyword(s):  
Raman Band ◽  
Band Shape ◽  
Molecular Reorientation

Molecular reorientation in plastic crystals: Infrared and Raman band shape analysis of neopentane

1973 ◽  
Vol 59 (5) ◽  
pp. 2498-2508 ◽  
Author(s):  
R. C. Livingston ◽  
Walter G. Rothschild ◽  
J. J. Rush
Keyword(s):  
Shape Analysis ◽  
Raman Band ◽  
Band Shape ◽  
Molecular Reorientation ◽  
Plastic Crystals

RAMAN SPECTRA OF TITANIUM DI-, TRI-, AND TETRA-CHLORIDES

2001 ◽  
Vol 15 (28n30) ◽  
pp. 3865-3868 ◽  
Author(s):  
H. MIYAOKA ◽  
T. KUZE ◽  
H. SANO ◽  
H. MORI ◽  
G. MIZUTANI ◽  
...  
Keyword(s):  
Force Constant ◽  
Raman Spectra ◽  
Normal Mode ◽  
Raman Band ◽  
Normal Mode Analysis ◽  
Force Constants ◽  
Mode Analysis ◽  
Oxidation Number

We have obtained the Raman spectra of TiCl n (n= 2, 3, and 4). Assignments of the observed Raman bands were made by a normal mode analysis. The force constants were determined from the observed Raman band frequencies. We have found that the Ti-Cl stretching force constant increases as the oxidation number of the Ti species increases.

Nitrogen and Oxygen Self-Broadening and Shift Coefficients of Rotational-Vibrational Raman Band in 1–50 ATM Range

2021 ◽  
Vol 63 (9) ◽  
pp. 1646-1648
Author(s):  
D. V. Petrov ◽  
I. I. Matrosov ◽  
A. R. Zaripov ◽  
A. S. Tanichev
Keyword(s):  
Raman Band

VIBRATIONAL FREQUENCY PERTURBATIONS IN THE RAMAN SPECTRUM OF COMPRESSED GASEOUS HYDROGEN

1964 ◽  
Vol 42 (6) ◽  
pp. 1058-1069 ◽  
Author(s):  
A. D. May ◽  
G. Varghese ◽  
J. C. Stryland ◽  
H. L. Welsh
Keyword(s):  
Raman Band ◽  
Intermolecular Forces ◽  
Hydrogen Gas ◽  
High Spectral Resolution ◽  
Intermolecular Potential ◽  
Dispersion Forces ◽  
Frequency Shifts ◽  
Linear Coefficient ◽  
Relative Population ◽  
Good Agreement

The frequencies of the Q(J) lines of the fundamental Raman band of compressed hydrogen gas were measured with high spectral resolution for a series of densities from 25 to 400 Amagat units at 300 °K and 85 °K. The frequency shifts are expressed as a power series in the gas density. The linear coefficient at a given temperature has the form aJ = ai + ae(nJ/n), where ai, constant for all the Q lines, can be interpreted in terms of isotropic intermolecular forces, and ae(nJ/n), proportional to the relative population of the initial J level, arises from the inphase coupled oscillation of pairs of molecules. The temperature variation of ai is analyzed on the basis of the Lennard-Jones intermolecular potential and the molecular pair distribution function. The repulsive overlap forces and the attractive dispersion forces give, respectively, positive and negative contributions to ai, which can be characterized by the empirical parameters Krep and Katt. The values of Katt and ae are in good agreement with calculations based on the polarizability model of the dispersion forces. The relation of the results to the Raman frequency shifts in solid hydrogen is discussed.

Quenched molecular reorientation and angular velocity in nanopores

1996 ◽  
Vol 14 (7-8) ◽  
pp. 727-730
Author(s):  
J.-P. Korb ◽  
L. Malier ◽  
F. Cros
Keyword(s):  
Angular Velocity ◽  
Molecular Reorientation
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