The raman spectra of molecular crystals of1,2, 3-trisubstituted benzenes in the low frequency region

1970 ◽  
Vol 13 (4) ◽  
pp. 1407-1408
Author(s):  
V. P. Fedorov ◽  
A. V. Korshunov ◽  
V. E. Volkov
Keyword(s):  
Raman Spectra ◽  
Molecular Crystals ◽  
Low Frequency ◽  
Frequency Region

Pressure Dependence of Raman Spectra in Low Frequency Region of LaNbO4

1987 ◽  
Vol 56 (2) ◽  
pp. 794-797 ◽  
Author(s):  
Kazuhiro Hara ◽  
Akikatsu Sawada ◽  
Yoshihiro Ishibashi
Keyword(s):  
Raman Spectra ◽  
Pressure Dependence ◽  
Low Frequency ◽  
Frequency Region

Raman spectra of glassy aqueous LiX and CaX2 solutions (X = Cl, Br and I) in the low frequency region

1980 ◽  
Vol 72 (3) ◽  
pp. 541-545 ◽  
Author(s):  
H. Kanno ◽  
J. Hiraishi
Keyword(s):  
Raman Spectra ◽  
Low Frequency ◽  
Frequency Region

Temperature Dynamics for Low-Frequency Raman Spectra of Progesterone, 17α-Hydroxyprogesterone and Cortisone

2010 ◽  
Vol 5 (4) ◽  
pp. 168-172
Author(s):  
Оlga P. Cherkasova ◽  
Vladimir A. Volodin ◽  
Valentina A. Minaeva ◽  
Boris F. Minaev ◽  
Gleb V. Baryshnikov
Keyword(s):  
Raman Spectra ◽  
Density Functional Calculations ◽  
Density Functional ◽  
Low Frequency ◽  
Vibrational Frequencies ◽  
Frequency Region ◽  
Spectral Features ◽  
Temperature Dynamics

The Raman spectra of progesterone, 17α-hydroxyprogesterone and cortisone in the low-frequency region are studied. Several intense spectral features demonstrate clear temperature dynamics in the range of 83 K. Assignment of vibrational frequencies is performed with the use of density functional calculations at the B3LYP/6-31G(d,p) level. The observed spectral features are assigned to vibrations of the whole skeleton including substituents at the С 17 atom

A Study of the Temperature-Dependence of Low-Frequency, Raman-Active Phonons in Stage-2 Graphite-K and Graphite-Rb Intercalation Compounds

1982 ◽  
Vol 20 ◽  
Author(s):  
J. Giergiel ◽  
P. C. Eklund ◽  
R. Al-Jishi ◽  
G. Dresselhaus
Keyword(s):  
Phase Transitions ◽  
Raman Scattering ◽  
Temperature Dependence ◽  
Raman Spectra ◽  
Lattice Dynamics ◽  
Low Frequency ◽  
Frequency Region ◽  
Intercalation Compounds ◽  
Dynamics Model ◽  
Scattering Study

ABSTRACTWe report results from a Raman scattering study of stage 2 Graphite-Rb and Graphite-K in the low frequency region (ω < 150 cm-1) as a function of temperature (80K < T < 300K). Four features are seen in the 80K spectra and are interpreted in terms of a Born– von Kármán lattice dynamics model. The temperature-dependence of the Raman spectra is discussed in connection with reported phase transitions in stage 2 alkalimetal graphite compounds.

Vibrational Spectra of Tetrahedral Cyclopentadienyl Halogeno Complexes of Ti(iv) and Zr(iv)

1971 ◽  
Vol 25 (2) ◽  
pp. 187-191 ◽  
Author(s):  
Edward Maslowsky ◽  
Kazuo Nakamoto
Keyword(s):  
Raman Spectra ◽  
Vibrational Spectra ◽  
Low Frequency ◽  
Frequency Region ◽  
Ir And Raman Spectra ◽  
Normal Coordinate ◽  
Ir And Raman

The ir and Raman spectra of CpTiCl3 and CP2MX2 (Cp = C5H5, M = Ti, Zr and Hf, and X = a halogen) type compounds have been measured. Approximate normal coordinate analyses have been carried out to assign the skeletal modes in the low frequency region.

Far-infrared and Raman spectra of the low frequency region in Hofmann-Td type clathrates

1997 ◽  
Vol 408-409 ◽  
pp. 435-438 ◽  
Author(s):  
Liljana Andreeva ◽  
Biljana Minceva-Sukarova
Keyword(s):  
Raman Spectra ◽  
Low Frequency ◽  
Far Infrared ◽  
Frequency Region ◽  
Infrared And Raman Spectra

Pressure Dependence of Raman Spectra in Low Frequency Region of Ferroelastic NdNbO4

1987 ◽  
Vol 56 (6) ◽  
pp. 2187-2191 ◽  
Author(s):  
Kazuhiro Hara ◽  
Akikatsu Sawada ◽  
Yoshihiro Ishibashi
Keyword(s):  
Raman Spectra ◽  
Pressure Dependence ◽  
Low Frequency ◽  
Frequency Region

Infrared and Raman spectra of polyethylene oxide in the low frequency region

1974 ◽  
Vol 61 (2) ◽  
pp. 504-506 ◽  
Author(s):  
John F. Rabolt ◽  
Kenneth W. Johnson ◽  
Robert N. Zitter
Keyword(s):  
Raman Spectra ◽  
Polyethylene Oxide ◽  
Low Frequency ◽  
Frequency Region ◽  
Infrared And Raman Spectra

Theoretically derived thermodynamic properties can be improved by the refinement of low-frequency modes against X-ray diffraction data

2021 ◽  
Author(s):  
Anna Agnieszka Hoser ◽  
Marcin Sztylko ◽  
Damian Trzybiński ◽  
Anders Østergaard Madsen
Keyword(s):  
Thermodynamic Properties ◽  
Dft Calculations ◽  
Diffraction Data ◽  
Molecular Crystals ◽  
Low Frequency ◽  
X Ray Diffraction ◽  
X Ray ◽  
Efficient Approach

A framework for estimation of thermodynamic properties for molecular crystals via refinement of frequencies from DFT calculations against X-ray diffraction data is presented. The framework provides an efficient approach to...

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