Laser Raman spectroscopy of THF clathrate hydrate in the temperature range 90–300 K

In situ Raman and Fourier transform infrared (FTIR-NIR) spectroscopic studies on tetrahydrofuran (THF-C 4H 8O) clathrate hydrate (CH) were reported. The Raman results in lattice (64 cm −1), ring breathing and C–H stretching mode regions are in conformity with earlier reports, while the FTIR (NIR) st...

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Bibliographic Details
Published in:Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy Molecular and biomolecular spectroscopy, 2007-12, Vol.68 (4), p.1096-1100
Main Authors: Prasad, P.S.R., Shiva Prasad, K., Thakur, N.K.
Format: Article
Language:English
Subjects:
Clathrate hydrate
FTIR (NIR) spectroscopy
Furans - chemistry
Lasers
Raman spectroscopy
Spectroscopy, Fourier Transform Infrared
Spectrum Analysis, Raman
Structure-I
Structure-II
Temperature
THF
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Summary:In situ Raman and Fourier transform infrared (FTIR-NIR) spectroscopic studies on tetrahydrofuran (THF-C 4H 8O) clathrate hydrate (CH) were reported. The Raman results in lattice (64 cm −1), ring breathing and C–H stretching mode regions are in conformity with earlier reports, while the FTIR (NIR) studies in second order mode region were reported for the first time. Comparison of the results indicate that the band assigned to ring breathing mode around 922 cm −1 (in Raman) and corresponding second order mode in NIR around 4295 cm −1 broadens and shifts in enclathrated THF. The ring breathing mode at lower temperatures ( T < 120 K) is highly asymmetric and splits into two and are due to different host–guest interactions at lower temperatures.
ISSN:1386-1425
DOI:10.1016/j.saa.2007.06.049