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FTIR AND LASER RAMAN SPECTRAL ANALYSIS OF CRYSTALLINE DL–VALINIUM DIHYDROGEN PHOSPHATE

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Author(s): B. RAVIKUMAR | S. RAMASWAMY | S. PANDIARAJAN

Journal: International Journal of Engineering Science and Technology
ISSN 0975-5462

Volume: 4;
Issue: 4;
Start page: 1658;
Date: 2012;
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Keywords: DL–valinium dihydrogen phosphate | Factor group analysis | Raman Spectrum | FT-IR spectrum | isopropyl group | hydrogen bonding | phosphate ion.

ABSTRACT
The vibrational spectra of crystalline DL–valinium dihydrogen phosphate were studied by both FT-IR and Laser Raman spectroscopy. From the infrared and Raman spectral measurements, the presence of various functional groups and modes of their vibrations were identified and assigned. The extensive intermolecular hydrogen bonding in the crystal was identified by the shifting of bands due to the stretching and bending modes of the various functional groups present in the crystal. The Td symmetry of the phosphate anion is reduced to the lower symmetry C2V owing to the intermolecular hydrogen bonding and coordination.
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