Antiferroelectric liquid crystals based on the salicylaldimine in connection with linear alkynyl chain

Two series of chiral salicylaldimine-based liquid crystals which differ from each other in the position of the (S)-2-octyloxy tail have been synthesized and characterized by polarizing optical microscopy, differential scanning calorimetry, and electrical switching. Compounds OH I (n = 6-7) having (S)-2-octyloxy tail close to the salicylaldimine core and compounds OH II (n = 6-11) having (S)-2-octyloxy tail far from the salicylaldimine core exhibit polymorphism of mesophases including frustrated blue phase and antiferroelectric (SmC*(A)) phases. Notably, as compared with structurally similar Schiff base compounds H I (n = 7), intramolecular hydrogen bonding in antiferroelectric salicylaldimine-based compounds OH I (n = 7) induces the frustrated blue phase. However, as compared with structurally similar Schiff base compounds OH II (n = 8), the lack of intramolecular hydrogen bonding in Schiff base compounds H II (n = 8) suppresses antiferroelectric properties.

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Constitutional bis(N-salicylideneaniline)s as new class of mesogens: synthesis and thermal properties

Hiremath¹

2013

Liquid Crystals

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Antiferroelectric liquid crystals based on the salicylaldimine in connection with linear alkynyl chain

Cited by 4 publications

References 35 publications

Study of mesomorphism, thermotropic properties and pitch in new chiral smectogenic imine compounds

Study of mesomorphism, thermotropic properties and pitch in new chiral smectogenic imine compounds

The effect of position of (S)-2-octyloxy tail on the formation of frustrated blue phase and antiferroelectric phase in Schiff base liquid crystals

Constitutional bis(N-salicylideneaniline)s as new class of mesogens: synthesis and thermal properties

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