Synthesis And Characterization Of Some Azobenzene Compounds And Their Derivatives Exhibiting Liquid Crystalline Properties

The first series of compounds categorized as conjugated haloazobenzene typically 2,2’-(4-hydroxyl-1,3-phenylene)bis(1-(4-chlorophenyl)diazene) [ClC6H4N=NC6H3OHN=NC6H4Cl] were synthesized by coupling reaction under controlled temperature and concentration. This particular process has led to the attac...

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التفاصيل البيبلوغرافية
المؤلف الرئيسي:	Ong , Chin Hin
التنسيق:	أطروحة
اللغة:	English
منشور في:	2010
الموضوعات:	QD Chemistry
الوصول للمادة أونلاين:	http://eprints.usm.my/41944/1/ONG_CHIN_HIN_HJ.pdf
الوسوم:	إضافة وسم لا توجد وسوم, كن أول من يضع وسما على هذه التسجيلة!

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record_format	uketd_dc
spelling	my-usm-ep.419442019-04-12T05:26:46Z Synthesis And Characterization Of Some Azobenzene Compounds And Their Derivatives Exhibiting Liquid Crystalline Properties 2010-11 Ong , Chin Hin QD Chemistry The first series of compounds categorized as conjugated haloazobenzene typically 2,2’-(4-hydroxyl-1,3-phenylene)bis(1-(4-chlorophenyl)diazene) [ClC6H4N=NC6H3OHN=NC6H4Cl] were synthesized by coupling reaction under controlled temperature and concentration. This particular process has led to the attack of benzenediazonium upon both ortho and para positions of phenol as evident by spectroscopic and X-ray structural analyses. The subsequent reactions between the earlier synthesized haloazobenzenes with various bromoalkanes in even-parity (CnH2n+1Br where n = 6, 8, 10, 12, 14 and 16) have resulted in the formation of new compounds with dual-azo groups [ClC6H4N=NC6H3OHN=NC6H4Cl]. As for second series, a total of seven compounds classified as 2,2’-(4-alkoxy-1,3-phenylene)bis(1-(substitutedphenyl) diazene) of which the substituents are bromo (Br), methoxy (OCH3) and ethyl (C2H5) have been synthesized and isolated. The inductive effect from these substituents residing along the conjugated system in these dual-azo compounds was studied. The thermal properties associated with the incorporation of various carbon chains (CnH2n+1) of even-parity n ranging from n = 6, 8, 10, 12 and 14 have also been studied using thermally-controlled polarizing optical microscope 2010-11 Thesis http://eprints.usm.my/41944/ http://eprints.usm.my/41944/1/ONG_CHIN_HIN_HJ.pdf application/pdf en public masters Universiti Sains Malaysia Pusat Pengajian Sains Kimia
institution	Universiti Sains Malaysia
collection	USM Institutional Repository
language	English
topic	QD Chemistry
spellingShingle	QD Chemistry Ong , Chin Hin Synthesis And Characterization Of Some Azobenzene Compounds And Their Derivatives Exhibiting Liquid Crystalline Properties
description	The first series of compounds categorized as conjugated haloazobenzene typically 2,2’-(4-hydroxyl-1,3-phenylene)bis(1-(4-chlorophenyl)diazene) [ClC6H4N=NC6H3OHN=NC6H4Cl] were synthesized by coupling reaction under controlled temperature and concentration. This particular process has led to the attack of benzenediazonium upon both ortho and para positions of phenol as evident by spectroscopic and X-ray structural analyses. The subsequent reactions between the earlier synthesized haloazobenzenes with various bromoalkanes in even-parity (CnH2n+1Br where n = 6, 8, 10, 12, 14 and 16) have resulted in the formation of new compounds with dual-azo groups [ClC6H4N=NC6H3OHN=NC6H4Cl]. As for second series, a total of seven compounds classified as 2,2’-(4-alkoxy-1,3-phenylene)bis(1-(substitutedphenyl) diazene) of which the substituents are bromo (Br), methoxy (OCH3) and ethyl (C2H5) have been synthesized and isolated. The inductive effect from these substituents residing along the conjugated system in these dual-azo compounds was studied. The thermal properties associated with the incorporation of various carbon chains (CnH2n+1) of even-parity n ranging from n = 6, 8, 10, 12 and 14 have also been studied using thermally-controlled polarizing optical microscope
format	Thesis
qualification_level	Master's degree
author	Ong , Chin Hin
author_facet	Ong , Chin Hin
author_sort	Ong , Chin Hin
title	Synthesis And Characterization Of Some Azobenzene Compounds And Their Derivatives Exhibiting Liquid Crystalline Properties
title_short	Synthesis And Characterization Of Some Azobenzene Compounds And Their Derivatives Exhibiting Liquid Crystalline Properties
title_full	Synthesis And Characterization Of Some Azobenzene Compounds And Their Derivatives Exhibiting Liquid Crystalline Properties
title_fullStr	Synthesis And Characterization Of Some Azobenzene Compounds And Their Derivatives Exhibiting Liquid Crystalline Properties
title_full_unstemmed	Synthesis And Characterization Of Some Azobenzene Compounds And Their Derivatives Exhibiting Liquid Crystalline Properties
title_sort	synthesis and characterization of some azobenzene compounds and their derivatives exhibiting liquid crystalline properties
granting_institution	Universiti Sains Malaysia
granting_department	Pusat Pengajian Sains Kimia
publishDate	2010
url	http://eprints.usm.my/41944/1/ONG_CHIN_HIN_HJ.pdf
_version_	1747821001995976704

Synthesis And Characterization Of Some Azobenzene Compounds And Their Derivatives Exhibiting Liquid Crystalline Properties

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