Srinivasa, H. T. and Palakshamurthy, B. S. and Devarajegowda, H. C. and Hariprasad, S. (2018) Synthesis, characterization, crystal structure and liquid crystal studies of some symmetric naphthalene derivative molecules. Journal of Molecular Structure, 1173. 620 - 626. ISSN 0022-2860
Full text not available from this repository. (Request a copy)Abstract
The synthesis of a series of symmetrical liquid crystals having naphthalene as the central rigid core and attached to long chain flexible 4′-alkoxybenzoate moiety at positions 2,6 - of the aromatic ring are reported. The mesophase behavior of the molecules was investigated using differential scanning calorimetry (DSC), polarizing optical microscopy (POM) and X-ray diffraction studies. The studies reveal that the synthesized compounds exhibit stable enantiotropic mesophase of Smectic A (SmA) and Nematic (N) phase. The mesophase appearance is independent of the length of the alkyl chain. The molecular structure was determined by single crystal X-ray diffraction technique. The derivative with n-heptyloxy- flexible chain crystallizes under triclinic, P1¯space group with unit cell dimension a = 5.569(3) Å, b = 10.540(5) Å, c = 15.254(9) Å, α = 73.434(18)o, β = 80.807(19)o and γ = 82.02(2)o, V = 843.1(8) Å3. The dihedral angle between the naphthalene ring system and the benzoate moiety is 63.63(2)o.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | Liquid crystal, Naphthalene, Smectic, Nematic, Schleiren texture, Symmetric |
| Subjects: | D Physical Science > Physics |
| Divisions: | Yuvaraj college > Physics |
| Depositing User: | Manjula P Library Assistant |
| Date Deposited: | 08 Nov 2019 11:09 |
| Last Modified: | 08 Nov 2019 11:09 |
| URI: | http://eprints.uni-mysore.ac.in/id/eprint/9905 |
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