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

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. Thermotr...

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Bibliographic Details
Main Authors: Xue-Ming Lin, Win-Long Chia
Format: Article
Language:English
Published: MDPI AG 2013-09-01
Series:International Journal of Molecular Sciences
Subjects:
liquid crystals
teraryl compounds
cyanopyridine terminus
mesomorphic behavior
Online Access:http://www.mdpi.com/1422-0067/14/9/18809
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spelling doaj-daefd0ad4232457eb7c010ce3d1f8c3a2020-11-24T22:07:54ZengMDPI AGInternational Journal of Molecular Sciences1422-00672013-09-01149188091882310.3390/ijms140918809Synthesis and Thermotropic Studies of a New Series of Teraryl Liquid Crystals 2-(4'-Alkoxybiphen-4-yl)-5-CyanopyridinesXue-Ming LinWin-Long ChiaA 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.http://www.mdpi.com/1422-0067/14/9/18809liquid crystalsteraryl compoundscyanopyridine terminusmesomorphic behavior
collection DOAJ
language English
format Article
sources DOAJ
author Xue-Ming Lin
Win-Long Chia
spellingShingle Xue-Ming Lin
Win-Long Chia
Synthesis and Thermotropic Studies of a New Series of Teraryl Liquid Crystals 2-(4'-Alkoxybiphen-4-yl)-5-Cyanopyridines
International Journal of Molecular Sciences
liquid crystals
teraryl compounds
cyanopyridine terminus
mesomorphic behavior
author_facet Xue-Ming Lin
Win-Long Chia
author_sort Xue-Ming Lin
title 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_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_sort synthesis and thermotropic studies of a new series of teraryl liquid crystals 2-(4'-alkoxybiphen-4-yl)-5-cyanopyridines
publisher MDPI AG
series International Journal of Molecular Sciences
issn 1422-0067
publishDate 2013-09-01
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.
topic liquid crystals
teraryl compounds
cyanopyridine terminus
mesomorphic behavior
url http://www.mdpi.com/1422-0067/14/9/18809
work_keys_str_mv AT xueminglin synthesisandthermotropicstudiesofanewseriesofterarylliquidcrystals24039alkoxybiphen4yl5cyanopyridines
AT winlongchia synthesisandthermotropicstudiesofanewseriesofterarylliquidcrystals24039alkoxybiphen4yl5cyanopyridines
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