title: An interpretation of the "anomalous" changes in the low-wavenumber range of the Raman spectra of L-alanine crystals.
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.
authors.affiliation: Institute of Inorganic Chemistry SB RAS, Novosibirsk, Russia.
authors.forename: Boris A
authors.initials: BA
authors.lastname: Kolesov
authors.forename: Elena V
authors.initials: EV
authors.lastname: Boldyreva
mesh_terms: D000409:Alanine / Q000737:chemistry*; D003460:Crystallization; D006860:Hydrogen Bonding; D011312:Pressure; D013059:Spectrum Analysis, Raman; D013696:Temperature; D014867:Water / Q000737:chemistry*
chemical_list: D014867:Water; D000409:Alanine
keywords: L-alanine; Raman spectroscopy; low-wavenumber range; self-trapping; vibrational bands