Phase transition in betaine potassium bromide dihydrate studied by Raman scattering

Authors
Yuzyuk, YI Almeida, A Chaves, MR Pinto, F Klopperpieper, A
Citation
Yi. Yuzyuk et al., Phase transition in betaine potassium bromide dihydrate studied by Raman scattering, J PHYS-COND, 12(28), 2000, pp. 6253-6264
Citations number
9
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
JOURNAL OF PHYSICS-CONDENSED MATTER
ISSN journal
09538984 → ACNP
Volume
12
Issue
28
Year of publication
2000
Pages
6253 - 6264
Database
ISI
SICI code
0953-8984(20000717)12:28<6253:PTIBPB>2.0.ZU;2-X
Abstract
Polarized Raman spectra of betaine potassium bromide dihydrate were studied in the broad spectral range 5-3600 cm(-1) and in the wide temperature inte rval 30-292 K, with special emphasis on the structural phase transition at 160 K, recently discovered. It is shown that this phase transition is relat ed to the freezing of the successive reorientations of the water molecules. Peculiar features and the temperature evolution of hydrogen bonding in thi s compound are discussed.