Abstract
l-threonine crystal was studied by Raman spectroscopy under pressure in the spectral range from 50 to 3300cm−1. The pressure range of a previous study has been extended from 4 to 27.0GPa. Modifications in the whole spectrum give us evidence of three structural phase transitions undergone by this amino acid as well as two conformational change. The classification of the vibrational modes and the behavior of their frequencies as a function of the pressure are presented.
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