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

Poornima Bhagavath, S. Mahabaleshwara

Research output: Contribution to journalArticle

3 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)339-345
Number of pages7
JournalJournal of Thermal Analysis and Calorimetry
Volume129
Issue number1
DOIs
Publication statusPublished - 01-07-2017

Fingerprint

Benzoic Acid
benzoic acid
Binary mixtures
binary mixtures
acids
Acids
Thermodynamic stability
thermal stability
Phase transitions
Carboxylic Acids
carboxylic acids
Optical microscopy
Differential scanning calorimetry
Enthalpy
heat measurement
enthalpy
transition temperature
microscopy
scanning
interactions

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Physical and Theoretical Chemistry

Cite this

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title = "Mesomorphism in binary mixtures of 4-((hexylimino)methyl)benzoic acid and 4-alkyloxybenzoic acids",
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.",
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Mesomorphism in binary mixtures of 4-((hexylimino)methyl)benzoic acid and 4-alkyloxybenzoic acids. / Bhagavath, Poornima; Mahabaleshwara, S.

In: Journal of Thermal Analysis and Calorimetry, Vol. 129, No. 1, 01.07.2017, p. 339-345.

Research output: Contribution to journalArticle

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AB - 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.

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