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Low-temperature Raman spectra of L-histidine crystal | | G. P. De Sousa
; P. T. C. Freire
; J. Mendes Filho
; F. E. A. Melo
; C. L. Lima
; | | Date: |
26 Apr 2013 | | Abstract: | We present a Raman spectroscopy investigation of the vibrational properties
of L-histidine crystals at low temperatures. The temperature dependence of the
spectra show discontinuities at 165 K, which we identify with modifications in
the bonds associated to both the NH3+ and CO2- motifs indicative of a
conformational phase transition that changes the intermolecular bonds.
Additional evidence of such a phase transition was provided by differential
scanning calorimetry measurements, which identified an enthalpic anomaly at
~165 K. | | Source: | arXiv, 1304.7692 | | Services: | Forum | Review | PDF | Favorites | |
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