An Interpretation of the “Anomalous” Changes in the Low-Wavenumber Range of the Raman Spectra of L-Alanine Crystals

Authors

  • Prof. Dr. Boris A. Kolesov,

    Corresponding author
    1. Institute of Inorganic Chemistry SB RAS, Novosibirsk (Russia)
    2. REC-008 Novosibirsk State University, Novosibirsk (Russia)
    • Institute of Inorganic Chemistry SB RAS, Novosibirsk (Russia)
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  • Prof. Dr. Elena V. Boldyreva

    1. REC-008 Novosibirsk State University, Novosibirsk (Russia)
    2. Institute of Solid State Chemistry and Mechanochemistry SB RAS, Novosibirsk (Russia)
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Abstract

“Anomalous changes” in the temperature- and pressure- dependences of the intensities and wavenumbers of the two low-wavenumber modes in Raman spectra of single-crystals of L-alanine have been interpreted in terms of a change in relative contributions of stretching and deformational components into the intermolecular vibrational bands. The relative contributions of the two components into a lattice vibration result from a change of relative orientations of molecules linked by hydrogen bonds in a three-dimensional network on variations of temperature or pressure.

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