Polarized luminescence of non-mesogenic europium(III) complexes doped into a nematic liquid crystal.
The luminescence spectra of europium(III) complexes dissolved in the liquid crystal 4'-pentyl-4-cyanobiphenyl (5CB) were investigated. Upon alignment of the europium(III)-doped nematic liquid-crystal host in a liquid-crystal cell with alignment layers, polarization effects were observed in the emission spectra. These polarization effects were visible as differences in the relative intensities of the crystal-field components of the transitions. Although the europium(III) complexes do not need to be liquid-crystalline themselves, some structural anisotropy is required for good alignment in the liquid crystal host and for the generation of linearly polarized light.
Driesen
Kris
K
Katholieke Universiteit Leuven, Department of Chemistry, Celestijnenlaan 200F, P.O. Box 2404, B-3001 Leuven, Belgium.
Vaes
Caroline
C
Cardinaels
Thomas
T
Goossens
Karel
K
Görller-Walrand
Christiane
C
Binnemans
Koen
K