High-pressure Raman study of l-alanine crystal
SOLID STATE COMMUNICATIONS(2000)
摘要
Single-crystal samples of L-alanine, CH3CH(NH2)COOH, a fundamental amino acid of most proteins, have been studied by Raman spectroscopy in a diamond-anvil cell up to pressures of 43 kbar. From the analysis of results we observed that the crystal undergoes a phase transition about 22-23 kbar. The transition is accompanied by abrupt changes in the relative intensity of low-energy bands, by the appearance of a phonon in the external mode region of the spectrum and by some modifications in phonons of the internal mode type. (C) 2000 Elsevier Science Ltd. All rights reserved.
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