Fluorescence study of field-induced director reorientations in low mass liquid crystalline compounds.
The Frederickz transition and the dynamic scattering deformation in 4-alkyloxy-4'-cyanobiphenyl compounds are investigated by fluorescence spectroscopy and turbidimetry. The main characteristics of the Frederickz deformation, reversibility and threshold voltage, in the nematic and the smectic A phase are investigated by means of fluorescence spectroscopy. Furthermore, the dynamics of the Frederickz transition are studied as a function of temperature and applied voltage. The results obtained with both techniques are compared and correlate well.
Department of Chemistry, Katholieke Universiteit Leuven, Celestijnenlaan 200F, B-3001, Heverlee, Belgium.
J
J
Hofkens
M
M
Van Damme
F C
FC
De Schryver
T G
TG
Ryan