P418
New Insight on the Photoisomerization-induced Nematic LC Phase change commanded by Azobenzene Derivative LB Film.
Hafiz Rashad Hafiz, Fusae Nakanishi
NIMC
We have established a new methods inorder to fabricat LB films made from
photoisomerizable 4-hexyl-4-(10-carboxydecamethyloxy)azobenzene (6azo10)
manipulated at the air-CdCl2 interface. With a simple heat treatment process,
the monolayers transferred by the condensed trans-isomers could be able to
exhibit a reversible cis-trans photoisomerization. In addition and for the first
time, monolayers have been formed using the cis-isomer that is quenched at a
segnificantly low temperatures before and during the monolayer formation and transfer
processes. We examined, by means of spectroscopy and microscopy, the
enfluence of such reversible process as a switching property on the orientation order
of a particular nematic liquid crystals in a host-guest cell construction. It was very
interesting to observe and monitor the phase change induced by the photoresponsive
azobenzene moiety and to somewhat optimize the conditions suitable for obtaining a
clear reversible vision of the Homeotropic-To-Plannar orintation.
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