Ionic discotic liquid crystals: Synthesis and characterization of pyridinium bromides containing a triphenylene core

Sandeep Kumar; Santanu Kumar Pal

doi:10.1016/j.tetlet.2005.03.201

Ionic discotic liquid crystals: Synthesis and characterization of pyridinium bromides containing a triphenylene core

Sandeep Kumar, Santanu Kumar Pal

Raman Research Institute

Research output: Contribution to journal › Article › peer-review

64 Scopus citations

Abstract

Five novel pyridinium salts tethered with hexaalkoxytriphenylene molecules were synthesized by the quaternization of pyridine with ω-bromo- substituted triphenylene derivatives. Their chemical structures were determined by ¹H NMR, ¹³C NMR, IR, UV spectroscopy and elemental analysis. The thermotropic liquid crystalline properties of these salts were investigated by polarizing optical microscopy and differential scanning calorimetry. These triphenylene-based pyridinium salts with bromide as counterion were found to be mesomorphic over a wide temperature range.

Original language	English
Pages (from-to)	4127-4130
Number of pages	4
Journal	Tetrahedron Letters
Volume	46
Issue number	23
DOIs	https://doi.org/10.1016/j.tetlet.2005.03.201
State	Published - 6 Jun 2005
Externally published	Yes

Keywords

Columnar mesophase
Discotic liquid crystals
Ionic liquid crystals
Triphenylene

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10.1016/j.tetlet.2005.03.201

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title = "Ionic discotic liquid crystals: Synthesis and characterization of pyridinium bromides containing a triphenylene core",

abstract = "Five novel pyridinium salts tethered with hexaalkoxytriphenylene molecules were synthesized by the quaternization of pyridine with ω-bromo- substituted triphenylene derivatives. Their chemical structures were determined by 1H NMR, 13C NMR, IR, UV spectroscopy and elemental analysis. The thermotropic liquid crystalline properties of these salts were investigated by polarizing optical microscopy and differential scanning calorimetry. These triphenylene-based pyridinium salts with bromide as counterion were found to be mesomorphic over a wide temperature range.",

keywords = "Columnar mesophase, Discotic liquid crystals, Ionic liquid crystals, Triphenylene",

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doi = "10.1016/j.tetlet.2005.03.201",

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AU - Pal, Santanu Kumar

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N2 - Five novel pyridinium salts tethered with hexaalkoxytriphenylene molecules were synthesized by the quaternization of pyridine with ω-bromo- substituted triphenylene derivatives. Their chemical structures were determined by 1H NMR, 13C NMR, IR, UV spectroscopy and elemental analysis. The thermotropic liquid crystalline properties of these salts were investigated by polarizing optical microscopy and differential scanning calorimetry. These triphenylene-based pyridinium salts with bromide as counterion were found to be mesomorphic over a wide temperature range.

AB - Five novel pyridinium salts tethered with hexaalkoxytriphenylene molecules were synthesized by the quaternization of pyridine with ω-bromo- substituted triphenylene derivatives. Their chemical structures were determined by 1H NMR, 13C NMR, IR, UV spectroscopy and elemental analysis. The thermotropic liquid crystalline properties of these salts were investigated by polarizing optical microscopy and differential scanning calorimetry. These triphenylene-based pyridinium salts with bromide as counterion were found to be mesomorphic over a wide temperature range.

KW - Columnar mesophase

KW - Discotic liquid crystals

KW - Ionic liquid crystals

KW - Triphenylene

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JO - Tetrahedron Letters

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Ionic discotic liquid crystals: Synthesis and characterization of pyridinium bromides containing a triphenylene core

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Keywords

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