Supermolecular Liquid Crystals - Liquid Crystalline Functional Assemblies and Their Supramolecular Structures - page 49

tion of a terminally appended mesogen into a supermolecule which has pre-
dominantly laterally appended mesogens in the periphery, as for 50 ,resultsin
a lowering of the relative melting point, but the mesomorphic properties re-
main nematic, which is expected as the terminally appended mesogen serves
to increase the disordering in the system.
However, when a laterally appended mesogen is introduced into a system
where all of the other mesogens are terminally appended, as for 51 ,thelat-
erally appended mesogen acts as a disruptor to the orderly packing of the
molecules together. This results in the suppression of the formation of smec-
tic modifications and support for nematic phases. Thus compound 49 ,which
Fig. 59 Comparison of liquid-crystalline multipedes possessing mixed laterally, 50 ,and
terminally appended, 51 , mesogens