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Vibrational spectra and phase transition in triglycine sulpho‐phosphate
Author(s) -
Joe I. Hubert,
Aruldhas G.,
Anbukumar S.,
Ramasamy P.
Publication year - 1994
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.2170290520
Subject(s) - raman spectroscopy , ion , chemistry , phase transition , proton , spectral line , crystallography , crystal (programming language) , infrared spectroscopy , infrared , polarization (electrochemistry) , hydrogen bond , phosphate , nuclear magnetic resonance , molecule , condensed matter physics , optics , physics , organic chemistry , quantum mechanics , astronomy , computer science , programming language
Infrared and single crystal Raman spectra for various polarization geometries of Triglycine Sulpho‐Phosphate (TGSP) have been recorded and analysed. The bonds of hydrogen atoms in H 2 SO 4 and H 3 PO 4 groups are shown to be weak and the possibility of proton transfer from H 2 SO 4 /H 3 PO 4 group is indicated. Two different types of glycinium ions are shown to be present in the unit cell. Temperature dependent Raman spectra of TGSP have been recorded. The phase transition detected around 325 K in TGSP is explained in terms of the flipping motion of the glycinium ion and of attaining a higher crystal symmetry.