2-phenylbenzoxazole-containing calamitic liquid crystals: synthesis and characterisation

Abstract

A series of 2-phenylbenzoxazole liquid crystals having intramolecular hydrogen-bonded Schiff's base linkers have been synthesised. All of them exhibit liquid crystalline phase behaviour. They showed only SmC phase transition. The phase is stabilised over a wide temperature range due to the presence of intramolecular H-bonding.

Keywords:

• benzoxazole
• intramolecular H-bonding
• Schiff's base
• SmC phase

Acknowledgements

We thank DST (New Delhi) and CSIR (New Delhi) for financial assistance. One of us (T.G.) is grateful to CSIR (New Delhi) for his research fellowship.