Document Type
Article
Publication Date
1-1-2016
Abstract
A homologous series of liquid crystal bearing with heterocyclic thiophene Schiff base ester with alkanoyloxy chain (CH3(CH2)nCOO–, where , 6, 8, 10, 12, 14, 16) was successfully synthesized through the modification of some reported methods. The structural information of these compounds was isolated and characterized through some spectroscopic techniques, such as FTIR, 1H, and 13C NMR and elemental analysis. Textural observation was carried out using a polarizing optical microscope (POM) over heating and cooling cycles. It was found that all synthesized compounds (3a–g) exhibited an enantiotropic nematic phase upon the heating and cooling cycle with high thermal stability. Moreover, a characteristic bar transition texture was observed for compounds 3f and 3g which have shown transition of nematic-to-smectic C phase. This has been further confirmed by obtaining relative phase transition temperature using the differential scanning calorimetry (DSC).
Keywords
New Homologues Series, Heterocyclic Schiff Base Ester, Synthesis, Characterization
Divisions
CHEMISTRY
Funders
Postgraduate Research Fund (PPP). Vote PG013-2013A,Fundamental Research Grant Scheme (FRGS). Vote FP031-2014B
Publication Title
Advances in Physical Chemistry
Volume
2016
Publisher
Hindawi Publishing Corporation