Influence of Moieties and Chain Length on the Abundance of Orthogonal and Tilted Phases of Linear Hydrogen-Bonded Liquid Crystals, Py16BA:nOBAs

Bhat, Sangeetha G.; Srinivasulu, M.; Girish, S.R.; Padmalatha,; Bhagavath, Poornima; Mahabaleshwara, S.; Potukuchi, D. M.; Muniprasad, M.

doi:10.1080/15421406.2011.604569

Cited by 17 publications

(2 citation statements)

References 25 publications

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“…Interestingly, a tilted chiral SmC phase is also noticed in the 13b (C 12 .Ox.C * C n ) series along with the 1D orthogonal SmA phase. Due to the presence of long chains on both sides of the oxadiazole core, the molecules are argued to favour [44–46] the orientational disorder, which leads to the stabilization of tilt layered structures. The mesomorphic thermal range of the SmC* phase is found to be less than the SmA phase exhibited by both series.…”

Section: Resultsmentioning

confidence: 99%

Novel biphenyl-substituted 1,2,4-oxadiazole ferroelectric liquid crystals: synthesis and characterization

Subrao¹,

Potukuchi²,

Ramachandra³

et al. 2015

Beilstein J. Org. Chem.

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SummaryTwo novel series of unsymmetrically substituted 1,2,4-oxadiazole viz., R.Ox.C*Cn compounds are synthesized and characterized. An optically active, (S)-(+)-methyl 3-hydroxy-2-methylpropionate is used to introduce a chiral center in the molecule. A biphenyl moiety prepared by Suzuki coupling reaction is directly attached to the oxadiazole core at C-5 position. Investigations for the phase behavior revealed that the series with a benzyl group on one end of the oxadiazole core exhibits an 1D orthogonal smectic-A phase while the second series with dodecyl flexible end chain shows orthogonal smectic-A and tilted chiral smectic-C (SmC*) phases over a wide range of temperatures. The smectic-C phase exhibits ferroelectric (FE) polarization switching. The mesomorphic thermal stabilities of these compounds are discussed in the domain of the symmetry and the flexibility of the alkyloxy end chain length attached to the chiral center.

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Section: Resultsmentioning

confidence: 99%

Novel biphenyl-substituted 1,2,4-oxadiazole ferroelectric liquid crystals: synthesis and characterization

Subrao¹,

Potukuchi²,

Ramachandra³

et al. 2015

Beilstein J. Org. Chem.

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“…This was attributed to the increasing molecular weight of the resulting hydrogen bonded complexes. They also compared the mesogenic properties with their previous report (Bhat et al 62 ) and concluded that the p/C-H interactions and p-p stacking interactions play crucial roles while exhibiting mesomorphic properties. Smaller thermal ranges of mesomorphic phase than those of the pure alkoxy benzoic acid dimeric mesogens were observed in the 144a-b/145a-g complexes with two aromatic rings.…”

Section: Pyridine-based Molecules As Thermotropic Mesogensmentioning

confidence: 92%