Abstract
A new four ring bent-core liquid crystal
(4'-n-octylphenylazo)-pheny1-4-yl-3-N-(4'-n-dodecyloxy-2-hydroxybenzy
lidene) amino-2-methyl benzoate has been synthesized and investigated
using differential scanning calorimetry (DSC), polarized optical
microscopy (POM) and temperature dependent Fourier transform infrared
(TD-FTIR) spectroscopy. DSC and POM were used to detect transition
temperatures and identify mesophases. TD-FTIR spectroscopic technique
was utilized as a probe to analyze the dynamics of the liquid crystal
molecules during the phase transition. The quantum chemical density
functional theory (DFT) was used to predict the most stable conformation
and the correct vibrational assignment of different modes. Combined
theoretical and experimental techniques provided a clear picture of the
structural modifications and dynamics of mesophases during the phase
transitions. (C) 2016 Elsevier B.V. All rights reserved.
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