High temperature Raman spectra of L-leucine crystals
AUTOR(ES)
Façanha Filho, P. F., Freire, P. T. C., Lima, K. C. V., Mendes Filho, J., Melo, F. E. A., Pizani, P. S.
FONTE
Brazilian Journal of Physics
DATA DE PUBLICAÇÃO
2008-03
RESUMO
Single crystal samples of L-leucine, C6H13NO2, a fundamental aliphatic amino acid of the human body, have been studied by Raman spectroscopy at temperatures from 300 to 430 K over the spectral range from 50 to 3100 cm-1. A tentative assignment of all bands is given. For high temperatures, several modifications on the Raman spectra were observed at about 353 K, giving evidence that the L-leucine crystal undergoes a structural phase transition. An interpretation for this phase transition in terms of group theory analysis is given.
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