Infrared vibrational spectra of
-histidinium dihydrogen orthophosphate orthophosphoric acid (LHP) |
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Authors: | E Espinosa B Wyncke F Brhat X Gerbaux S Veintemillas E Molins |
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Institution: | E. Espinosa, B. Wyncke, F. Bréhat, X. Gerbaux, S. Veintemillas,E. Molins |
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Abstract: | The entire vibrational spectrum of a single crystal of
-histidinium dihydrogen orthophosphate orthophosphoric acid (LHP) was studied by infrared (IR) spectroscopy from 10 up to 4000 cm−1. The polarized infrared (IR) reflectivity spectra were measured between 7 and 250 K, in the frequency range 10–600 cm−1. From the IR spectral analysis, the phonon modes were classified within their symmetry species, and their longitudinal (LO) and transversal (TO) optical frequencies were calculated. A tentative assignment of the various internal modes observed in the transmissivity spectrum of LHP, between 300 and 4000 cm−1, is proposed. The present study did not reveal any low-temperature structural phase transition. |
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Keywords: | Far infrared spectroscopy Lattice vibrations Molecular vibrations -histidinium dihydrogen orthophosphate orthophosphoric acid (LHP) |
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