Synthesis and Thermotropic Properties of Some New Schiff Bases, N-[4-(4-n-Alkanoyloxybenzoyloxy)-2-Hydroxybenzylidene]-4-Cyano-, 4-Hydroxy-, 4-Thio- and 4-Nitroanilines

Synthesis and Thermotropic Properties of Some New Schiff Bases, N-[4-(4-n-Alkanoyloxybenzoyloxy)-2-Hydroxybenzylidene]-4-Cyano-, 4-Hydroxy-, 4-Thio- and 4-Nitroanilines

A series of elongated Schiff base esters containing three aromatic rings with hexadecanoyl chain as one of the terminal group and various R substituents (R = CN, OH, SH, and NO2) at the other end of molecule were prepared, and their structures were confirmed via physical measurement. The thermotropi...

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Main Authors: Sie-Tiong Ha, Guan-Yeow Yeap, Peng-Lim Boey
Format: Article
Language:English
Published: Hindawi Limited 2012-01-01
Series:E-Journal of Chemistry
Online Access:http://dx.doi.org/10.1155/2012/276327
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spelling doaj-c8550974c7f042e3b8abc34a27ad5a1f2020-11-24T23:50:03ZengHindawi LimitedE-Journal of Chemistry0973-49452090-98102012-01-01942550255610.1155/2012/276327Synthesis and Thermotropic Properties of Some New Schiff Bases, N-[4-(4-n-Alkanoyloxybenzoyloxy)-2-Hydroxybenzylidene]-4-Cyano-, 4-Hydroxy-, 4-Thio- and 4-NitroanilinesSie-Tiong Ha0Guan-Yeow Yeap1Peng-Lim Boey2Department of Chemical Science, Faculty of Science, Universiti Tunku Abdul Rahman, Jln Universiti, Bandar Barat, Kampar, 31900 Perak, MalaysiaLiquid Crystal Research Laboratory, School of Chemical Sciences, Universiti Sains Malaysia, 11800 Minden, Penang, MalaysiaLiquid Crystal Research Laboratory, School of Chemical Sciences, Universiti Sains Malaysia, 11800 Minden, Penang, MalaysiaA series of elongated Schiff base esters containing three aromatic rings with hexadecanoyl chain as one of the terminal group and various R substituents (R = CN, OH, SH, and NO2) at the other end of molecule were prepared, and their structures were confirmed via physical measurement. The thermotropic properties of these compounds were investigated via differential scanning calorimetry and polarizing optical microscopy. The thermal data indicate that all of these compounds exhibit mesomorphic properties. Whilst compounds with R = OH, SH and NO2 show nematic phases, compound containing cyano substituent are smectogenic in nature.http://dx.doi.org/10.1155/2012/276327
collection DOAJ
language English
format Article
sources DOAJ
author Sie-Tiong Ha
Guan-Yeow Yeap
Peng-Lim Boey
spellingShingle Sie-Tiong Ha
Guan-Yeow Yeap
Peng-Lim Boey
Synthesis and Thermotropic Properties of Some New Schiff Bases, N-[4-(4-n-Alkanoyloxybenzoyloxy)-2-Hydroxybenzylidene]-4-Cyano-, 4-Hydroxy-, 4-Thio- and 4-Nitroanilines
E-Journal of Chemistry
author_facet Sie-Tiong Ha
Guan-Yeow Yeap
Peng-Lim Boey
author_sort Sie-Tiong Ha
title Synthesis and Thermotropic Properties of Some New Schiff Bases, N-[4-(4-n-Alkanoyloxybenzoyloxy)-2-Hydroxybenzylidene]-4-Cyano-, 4-Hydroxy-, 4-Thio- and 4-Nitroanilines
title_short Synthesis and Thermotropic Properties of Some New Schiff Bases, N-[4-(4-n-Alkanoyloxybenzoyloxy)-2-Hydroxybenzylidene]-4-Cyano-, 4-Hydroxy-, 4-Thio- and 4-Nitroanilines
title_full Synthesis and Thermotropic Properties of Some New Schiff Bases, N-[4-(4-n-Alkanoyloxybenzoyloxy)-2-Hydroxybenzylidene]-4-Cyano-, 4-Hydroxy-, 4-Thio- and 4-Nitroanilines
title_fullStr Synthesis and Thermotropic Properties of Some New Schiff Bases, N-[4-(4-n-Alkanoyloxybenzoyloxy)-2-Hydroxybenzylidene]-4-Cyano-, 4-Hydroxy-, 4-Thio- and 4-Nitroanilines
title_full_unstemmed Synthesis and Thermotropic Properties of Some New Schiff Bases, N-[4-(4-n-Alkanoyloxybenzoyloxy)-2-Hydroxybenzylidene]-4-Cyano-, 4-Hydroxy-, 4-Thio- and 4-Nitroanilines
title_sort synthesis and thermotropic properties of some new schiff bases, n-[4-(4-n-alkanoyloxybenzoyloxy)-2-hydroxybenzylidene]-4-cyano-, 4-hydroxy-, 4-thio- and 4-nitroanilines
publisher Hindawi Limited
series E-Journal of Chemistry
issn 0973-4945
2090-9810
publishDate 2012-01-01
description A series of elongated Schiff base esters containing three aromatic rings with hexadecanoyl chain as one of the terminal group and various R substituents (R = CN, OH, SH, and NO2) at the other end of molecule were prepared, and their structures were confirmed via physical measurement. The thermotropic properties of these compounds were investigated via differential scanning calorimetry and polarizing optical microscopy. The thermal data indicate that all of these compounds exhibit mesomorphic properties. Whilst compounds with R = OH, SH and NO2 show nematic phases, compound containing cyano substituent are smectogenic in nature.
url http://dx.doi.org/10.1155/2012/276327
work_keys_str_mv AT sietiongha synthesisandthermotropicpropertiesofsomenewschiffbasesn44nalkanoyloxybenzoyloxy2hydroxybenzylidene4cyano4hydroxy4thioand4nitroanilines
AT guanyeowyeap synthesisandthermotropicpropertiesofsomenewschiffbasesn44nalkanoyloxybenzoyloxy2hydroxybenzylidene4cyano4hydroxy4thioand4nitroanilines
AT penglimboey synthesisandthermotropicpropertiesofsomenewschiffbasesn44nalkanoyloxybenzoyloxy2hydroxybenzylidene4cyano4hydroxy4thioand4nitroanilines
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