Induced Smectic-G Phase through Intermolecular Hydrogen Bonding Part VIII

Phase and Crystallization Behaviours of 2-(p-n-heptyloxybenzylidene imino)-5-chloro-pyridine: P-n-alkoxybenzoic acid (HICPrwABA) Complexes

M. Srinivasulu, P. V.V. Satyanarayana, P. A. Kumar, V. G.K.M. Pisipati

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21 Citations (Scopus)

Abstract

New intermolecular H-bonded liquid crystalline complexes, viz., 2-(p-n-heptyloxybenzylidene imino)-5-chloro-pyridine:p-/z-alkoxybenzoic acid; (HICP:nABA) (where n denotes the alkoxy carbon numbers 3 to 10 and 12) exhibiting smectic-F (n = 12) and smectic-G phases have been synthesized and characterized by Thermal Microscopy and Differential Scanning Calorimetry (DSC). Detailed IR (solid and solution states) analysis confirms the existence of intermolecular H-bonding between the pyridyl nitrogen and the COOH group of the p-n-alkoxybenzoic acid moiety. The phase behaviour of the series is discussed in the light of reported data on free p-n-alkoxybenzoic acids. The crystallization kinetics of a representative complex, using the DSC technique, is discussed. The mechanism of the crystal growth of the new crystalline smectic-G phase is computed with the Avrami equation.

Original languageEnglish
Pages (from-to)685-691
Number of pages7
JournalZeitschrift fur Naturforschung - Section A Journal of Physical Sciences
Volume56
Issue number9-10
DOIs
Publication statusPublished - 01-01-2001

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Crystallization
Hydrogen
pyridines
Hydrogen bonds
crystallization
acids
Acids
Scanning
Differential scanning calorimetry
hydrogen
heat measurement
Crystalline materials
scanning
Crystallization kinetics
Crystal Growth
Phase behavior
Microscopy
Nitrogen
crystal growth
Microscopic examination

All Science Journal Classification (ASJC) codes

  • Mathematical Physics
  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

Cite this

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title = "Induced Smectic-G Phase through Intermolecular Hydrogen Bonding Part VIII: Phase and Crystallization Behaviours of 2-(p-n-heptyloxybenzylidene imino)-5-chloro-pyridine: P-n-alkoxybenzoic acid (HICPrwABA) Complexes",
abstract = "New intermolecular H-bonded liquid crystalline complexes, viz., 2-(p-n-heptyloxybenzylidene imino)-5-chloro-pyridine:p-/z-alkoxybenzoic acid; (HICP:nABA) (where n denotes the alkoxy carbon numbers 3 to 10 and 12) exhibiting smectic-F (n = 12) and smectic-G phases have been synthesized and characterized by Thermal Microscopy and Differential Scanning Calorimetry (DSC). Detailed IR (solid and solution states) analysis confirms the existence of intermolecular H-bonding between the pyridyl nitrogen and the COOH group of the p-n-alkoxybenzoic acid moiety. The phase behaviour of the series is discussed in the light of reported data on free p-n-alkoxybenzoic acids. The crystallization kinetics of a representative complex, using the DSC technique, is discussed. The mechanism of the crystal growth of the new crystalline smectic-G phase is computed with the Avrami equation.",
author = "M. Srinivasulu and Satyanarayana, {P. V.V.} and Kumar, {P. A.} and Pisipati, {V. G.K.M.}",
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AU - Satyanarayana, P. V.V.

AU - Kumar, P. A.

AU - Pisipati, V. G.K.M.

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N2 - New intermolecular H-bonded liquid crystalline complexes, viz., 2-(p-n-heptyloxybenzylidene imino)-5-chloro-pyridine:p-/z-alkoxybenzoic acid; (HICP:nABA) (where n denotes the alkoxy carbon numbers 3 to 10 and 12) exhibiting smectic-F (n = 12) and smectic-G phases have been synthesized and characterized by Thermal Microscopy and Differential Scanning Calorimetry (DSC). Detailed IR (solid and solution states) analysis confirms the existence of intermolecular H-bonding between the pyridyl nitrogen and the COOH group of the p-n-alkoxybenzoic acid moiety. The phase behaviour of the series is discussed in the light of reported data on free p-n-alkoxybenzoic acids. The crystallization kinetics of a representative complex, using the DSC technique, is discussed. The mechanism of the crystal growth of the new crystalline smectic-G phase is computed with the Avrami equation.

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