Synthesis, structural elucidation and mesophase behaviour of hexasubstituted cyclotriphosphazene molecules with amide linking unit

Zuhair Jamain and Melati Khairuddean and Nur Kamarina Kamaruddin and Yeoh Zhi Rui (2021) Synthesis, structural elucidation and mesophase behaviour of hexasubstituted cyclotriphosphazene molecules with amide linking unit. Malaysian Journal of Chemistry, 23. pp. 213-225. ISSN 1511-2292

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URL: https://ikm.org.my/ojs/index.php/MJChem/article/vi...

Abstract

Alkylation of 4-acetamidophenol with various alkyl halides gave alkylated derivatives 1a-d which were further reduced to form amines, 2a-d. A separate reaction of phosphonitrilic chloride trimer and methyl-4-hydroxybenzoate yielded 3, hexa-(oxy-4-methyl benzoate) cyclotriphosphazene which was then reacted with ethanol and potassium hydroxide to give 4, hexa-(oxy-4-benzoic acid) cyclotriphosphazene. This hexasubstituted intermediate 4 was reacted with a series of intermediates 2a-d to yield the final compounds 5a-d, hexasubstituted cyclotriphosphazene with amide linking unit. All the structures of the intermediates and final compounds were characterized using Fourier Transform Infrared (FTIR) and Nuclear Magnetic Resonance (NMR) spectroscopy. The liquid crystal properties of all the synthesized compounds were determined using Polarized Optical Microscope (POM). POM observations showed that compounds 5a-d exhibited liquid crystal properties of smectic A and smectic C phases.

Item Type:	Article
Keyword:	Liquid crystal , Cyclotriphosphazene , Amide , Smectic A , Smectic C
Subjects:	Q Science > QD Chemistry > QD1-999 Chemistry
Department:	FACULTY > Faculty of Science and Natural Resources
Depositing User:	DG MASNIAH AHMAD -
Date Deposited:	25 Oct 2021 20:49
Last Modified:	25 Oct 2021 20:49
URI:	https://eprints.ums.edu.my/id/eprint/30657

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