Mesomorphism in binary mixtures of 4-((hexylimino)methyl) benzoic acid and 4-alkyloxybenzoic acids

Poornima, B and Mahabaleshwara, S (2017) Mesomorphism in binary mixtures of 4-((hexylimino)methyl) benzoic acid and 4-alkyloxybenzoic acids. Journal of Thermal Analysis and Calorimetry, 129 (1). pp. 339-345. ISSN 1388-6150

[img] PDF
2931.pdf - Published Version
Restricted to Registered users only

Download (894kB) | Request a copy

Abstract

A new non-mesogenic Schiff-based carboxylic acid, viz. 4-((hexylimino)methyl)benzoic acid (HIMB), is synthesized and is used to prepare the binary mixtures with mesogenic 4-n-alkyloxybenzoic acids (nOBAs, where n = 3, 4, 5, 7, 8, 9 and 12) in 1:1 molar ratio. The mesomorphism in HIMB and nOBA mixtures is studied by polarizing optical microscopy and differential scanning calorimetry. The mesomorphic thermal stabilities of these mixtures are found to vary with those of the nOBAs. The results are discussed with the reported mixtures of nOBAs with other Schiff-based pyridyl moieties, which are found to exhibit new phase variants and mesomorphic thermal stabilities. The phase transition temperatures and the enthalpy changes at the phase transitions are discussed in comparison with the other similar binary mixtures. The effects of intermolecular interactions on mesomorphism are discussed

Item Type: Article
Uncontrolled Keywords: Schiff base � 4-Alkyloxybenzoic acids � Binary mixtures � Nematic phase � Smectic-C phases � Mesomorphic thermal ranges
Subjects: Engineering > MIT Manipal > Chemistry
Depositing User: MIT Library
Date Deposited: 01 Aug 2017 04:58
Last Modified: 01 Aug 2017 04:58
URI: http://eprints.manipal.edu/id/eprint/149456

Actions (login required)

View Item View Item