Fuorinated hydrogen bonding liquid crystals based on Schiff base
Journal of Fluorine Chemistry(2013)
摘要
Two new Schiff base compounds, tailed by the fluoroalkoxy, were synthesized in a three-step process. Those supramolecular structures constructed by hydrogen bonding show good liquid crystal properties with higher clear points and wider mesomorphic phase ranges than other analogs containing a terminal alkoxy chain. Investigation of the optical textures by polarizing microscopy reveals that terminal fluorinated substituents convert the nematic phase of supramolecular hydrogen-bonding complexes with terminal alkoxy chains into the smectic A phase of those with terminal fluoroalkoxy chains.
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关键词
Liquid crystal,Fluorous substituent,Schiff base,Hydrogen bonding,Supramolecule
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