Vibrational spectroscopy of structure transformation in two isomers of mezogenic 4-alcoxyphenyl-4′-alcoxybenzoates

Pogorelov, V.; Kutulya, L. A.; Shkolnikova, N. I.; Golub, Pavlo; Zhovtobruh, Y.; Astashkin, Yuri

doi:10.1016/j.molstruc.2011.01.048

Cited by 6 publications

(1 citation statement)

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“…At molecular level rotation of spacers in the mesogenic molecules, charge transfer phenomenon, changes in intra/intermolecular H‐bonding interactions, changes in molecular symmetry and others are observed during phase transitions, and therefore for better understanding, molecular techniques are needed. In LC systems due to the anisotropy of the molecular polarizability, Raman spectroscopy has a great potential to reflect the molecular changes during phase transitions in terms of some measurable parameters of marker bands . XRD, density functional theoretical (DFT) and Raman spectroscopic techniques together can be very helpful to study phase transitions at molecular level.…”

Section: Introductionmentioning

confidence: 99%

Molecular approach to phase transitions in a calamitic ester substituted aroylhydrazone liquid crystal

Nandi

Singh

et al. 2016

J Raman Spectroscopy

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Temperature dependent Raman and X-ray diffraction studies of a calamitic ester substituted aryolhydrazone liquid crystal (LC) system; N-[4-(4 -decyloxy)benzoyloxy benzylidene]-N -[4 -decyloxybenzoyl]hydrazine (DB2H) have been performed to investigate the molecular arrangement and intermolecular interaction environment in LC phase. X-ray diffraction study with the help of density functional theoretical study gives the information of molecular tilt angle in SmC layer. Prominent Raman signatures of crystal I → crystal II, crystal II → SmC and SmC → Isotropic phase transitions were identified in terms of changes in peak position and linewidth as well as Raman intensity. Analysis of Raman marker bands gives evidence of residual intermolecular hydrogen bonds between amide groups responsible for tilting arrangement in SmC phase.

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Section: Introductionmentioning

confidence: 99%