Origin of the complex molecular dynamics in functionalized discotic liquid crystals.
The molecular dynamics of three dipole functionalized hexa-peri-hexabenzocoronenes have been studied using site-specific NMR techniques and dielectric spectroscopy as a function of temperature and pressure. These probes (i) suggest that the thermodynamic state completely controls the dynamic response, (ii) clarify the origin of two dynamic processes associated with the presence of two glass temperatures, and (iii) provide the first phase diagram for substances of this kind.
Elmahdy
M M
MM
Department of Physics, University of Ioannina, 451 10 Ioannina, Greece and Foundation for Research and Technology-Hellas, Biomedical Research Institute, Ioannina, Greece.
Floudas
G
G
Mondeshki
M
M
Spiess
H W
HW
Dou
X
X
Müllen
K
K