Abstract
A new series of tolane-based liquid crystals with different five-membered N-heterocycle as molecular rigid core have been prepared in good yield. All of these new compounds show mesomorphic behaviors, good thermal stability and intrinsic fluorescence nature. The physical and electro-optical properties of these liquid crystal materials were evaluated. Their properties can be adjusted by varying the alkyl/alkoxyl chain or N-heterocycles. Most of the new compounds exhibit high birefringence, and compounds with propyl chain display stronger fluorescence intensity than those with methoxyl. These tolane-based N-heterocyclic liquid crystals may be used as new high birefringence fluorescent liquid crystal materials.
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