Synthesis and Thermotropic Studies of a New Series of Teraryl Liquid Crystals 2-(4′-Alkoxybiphen-4-yl)-5-Cyanopyridines

A new series of teraryl 2-(4′-alkoxybiphen-4-yl)-5-cyanopyridines (nO-PPPyCN, n = 2–8) compounds, bearing a cyanopyridine terminus, were synthesized using a short 2-step reaction with overall yields between 33% and 69%. Spectral analyses were in accord with the expected structures. Thermotropic beha...

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Detalles Bibliográficos
Autores principales: Chia, Win-Long, Lin, Xue-Ming
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2013
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3794808/
https://www.ncbi.nlm.nih.gov/pubmed/24036442
http://dx.doi.org/10.3390/ijms140918809
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author Chia, Win-Long
Lin, Xue-Ming
author_facet Chia, Win-Long
Lin, Xue-Ming
author_sort Chia, Win-Long
collection PubMed
description A new series of teraryl 2-(4′-alkoxybiphen-4-yl)-5-cyanopyridines (nO-PPPyCN, n = 2–8) compounds, bearing a cyanopyridine terminus, were synthesized using a short 2-step reaction with overall yields between 33% and 69%. Spectral analyses were in accord with the expected structures. Thermotropic behavior of the teraryl compounds was investigated using polarised optical microscopy and differential scanning calorimetry. All compounds exhibited both enantiotropic nematic and smectic A phases, with an additional enantiotropic smectic C phase when n = 7 and 8. Polymesomorphism appears to be a common behavior in this series of linear liquid crystal compounds.
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spelling pubmed-37948082013-10-21 Synthesis and Thermotropic Studies of a New Series of Teraryl Liquid Crystals 2-(4′-Alkoxybiphen-4-yl)-5-Cyanopyridines Chia, Win-Long Lin, Xue-Ming Int J Mol Sci Article A new series of teraryl 2-(4′-alkoxybiphen-4-yl)-5-cyanopyridines (nO-PPPyCN, n = 2–8) compounds, bearing a cyanopyridine terminus, were synthesized using a short 2-step reaction with overall yields between 33% and 69%. Spectral analyses were in accord with the expected structures. Thermotropic behavior of the teraryl compounds was investigated using polarised optical microscopy and differential scanning calorimetry. All compounds exhibited both enantiotropic nematic and smectic A phases, with an additional enantiotropic smectic C phase when n = 7 and 8. Polymesomorphism appears to be a common behavior in this series of linear liquid crystal compounds. MDPI 2013-09-12 /pmc/articles/PMC3794808/ /pubmed/24036442 http://dx.doi.org/10.3390/ijms140918809 Text en © 2013 by the authors; licensee MDPI, Basel, Switzerland http://creativecommons.org/licenses/by/3.0 This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/3.0/).
spellingShingle Article
Chia, Win-Long
Lin, Xue-Ming
Synthesis and Thermotropic Studies of a New Series of Teraryl Liquid Crystals 2-(4′-Alkoxybiphen-4-yl)-5-Cyanopyridines
title Synthesis and Thermotropic Studies of a New Series of Teraryl Liquid Crystals 2-(4′-Alkoxybiphen-4-yl)-5-Cyanopyridines
title_full Synthesis and Thermotropic Studies of a New Series of Teraryl Liquid Crystals 2-(4′-Alkoxybiphen-4-yl)-5-Cyanopyridines
title_fullStr Synthesis and Thermotropic Studies of a New Series of Teraryl Liquid Crystals 2-(4′-Alkoxybiphen-4-yl)-5-Cyanopyridines
title_full_unstemmed Synthesis and Thermotropic Studies of a New Series of Teraryl Liquid Crystals 2-(4′-Alkoxybiphen-4-yl)-5-Cyanopyridines
title_short Synthesis and Thermotropic Studies of a New Series of Teraryl Liquid Crystals 2-(4′-Alkoxybiphen-4-yl)-5-Cyanopyridines
title_sort synthesis and thermotropic studies of a new series of teraryl liquid crystals 2-(4′-alkoxybiphen-4-yl)-5-cyanopyridines
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3794808/
https://www.ncbi.nlm.nih.gov/pubmed/24036442
http://dx.doi.org/10.3390/ijms140918809
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