Design, mesomorphic properties, and supramolecular organization of fullerene-containing thermotropic liquid crystals
Date de parution
Journal of Materials Chemistry, Royal Society of Chemistry (RSC), 2002/12/7/1944-1951
Two concepts have been developed for the design of fullerene-containing thermotropic liquid crystals, namely, the covalent and non-covalent concepts. In the covalent approach, C<sub>60</sub> was functionalized with liquid-crystalline addends (malonate and aldehyde derivatives) by applying either the Bingel reaction or the 1,3-dipolar cycloaddition reaction. In the non-covalent approach, a liquid-crystalline inclusion complex was obtained from mesomorphic cyclotriveratrylene (CTV) derivatives and C<sub>60</sub>. All of the covalent C<sub>60</sub> derivatives showed smectic A phases. In one case, an additional nematic phase was detected. The [C<sub>60</sub>(CTV)<sub>2</sub>] complex gave rise to nematic-like and cubic phases. The covalent and non-covalent approaches demonstrate the various possibilities for C<sub>60</sub> to give rise to mesomorphic materials.
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