title: Lattice dynamics through the structural phase transition in D-amphetamine sulfate.
abstract: The polarized infrared and Raman spectra of the single-crystalline D-amphetamine sulfate have been measured as a function of temperature in the vicinity of the structural phase transition. Infrared and Raman-active modes are identified and assigned. Significant signatures of the structural phase transition are observed in the temperature dependence of infrared modes both of the D-amphetamine unit and the sulfate anion. The changes reflect differences in the unit cell between low- and high-temperature phases of the D-amphetamine sulfate. Temperature dependence of the vibrational mode parameters displays pronounced hysteresis between 333 and 338 K that is extended over a smaller temperature range than 325-345 K found in the earlier DSC study.
authors.affiliation: Institute of Molecular Physics, Polish Academy of Sciences, Smoluchowskiego 17, 60-179 Poznań, Poland. olejniczak@ifmpan.poznan.pl
authors.forename: Iwona
authors.initials: I
authors.lastname: Olejniczak
authors.forename: Katarzyna
authors.initials: K
authors.lastname: Pogorzelec-Glaser
mesh_terms: D018360:Crystallography, X-Ray; D003913:Dextroamphetamine / Q000737:chemistry*; D008958:Models, Molecular; D015394:Molecular Structure; D044367:Phase Transition; D013055:Spectrophotometry, Infrared; D013059:Spectrum Analysis, Raman; D013816:Thermodynamics
chemical_list: D003913:Dextroamphetamine