Citation
J. Wesicki et al., High pressure study of cation dynamics in pyridinium perchlorate, MOLEC PHYS, 98(10), 2000, pp. 643-649
Citations number
23
Categorie Soggetti
Physical Chemistry/Chemical Physics
Journal title
MOLECULAR PHYSICS
ISSN journal
00268976
→ ACNP
Volume
98
Issue
10
Year of publication
2000
Pages
643 - 649
Database
ISI
SICI code
0026-8976(20000520)98:10<643:HPSOCD>2.0.ZU;2-9
Abstract
Measurements of spin-lattice relaxation time and complex permittivity have
been performed for monocrystalline and polycrystalline pyridinium perchlora
te as a function of hydrostatic pressure and temperature. The influence of
pressure on the reorientation of the pyridinium cation was analysed. The po
tential shape and heights of the energy barriers for this reorientation in
all three phases have been determined. For phase I and III the pressure dep
endence of the activation enthalpy was obtained.