Synthesis, characterisation and liquid crystalline properties of some Schiff base-ester central linkage involving 2, 6- disubstituted naphthalene ring system

Autor:	B. T. Thaker, N. B. Patel, J. B. Kanojiya, D. B. Solanki, R. S. Tandel, B. S. Patel, Y. T. Dhimmar, N. J. Chothani
Rok vydání:	2012
Předmět:	Schiff base Materials science Mesogen Mesophase General Chemistry Condensed Matter Physics Ring (chemistry) Homologous series chemistry.chemical_compound Crystallography Differential scanning calorimetry chemistry Liquid crystal Organic chemistry General Materials Science Naphthalene
Zdroj:	Liquid Crystals. 39:551-569
ISSN:	1366-5855 0267-8292
DOI:	10.1080/02678292.2012.664175
Popis:	Four new mesogenic homologous series, each containing a 6-alkoxy 2-naphthoic acid and Schiff base-ester as central linkage, have been synthesised by esterification of 4-{[(4-hydroxyphenyl) imino] methyl} phenyl 4-propoxy benzoate, 4-{[(4-hydroxyphenyl) imino] methyl} phenyl 4- (pentyloxy) benzoate, 4-{[(4-hydroxyphenyl)imino]methyl}-2-methoxyphenyl 4- nitrobenzoate and 4-{[(4-hydroxyphenyl)imino]methyl}-2-methoxyphenyl 4- chlorobenzoate with different 6-alkoxy 2-naphthoic acid to give Series-A, -B, -C and -D, respectively. These compounds were characterised by elemental analysis, Fourier transform infrared, 1H nuclear magnetic resonance, ultraviolet-visible and mass spectral studies. Their mesomorphic behaviour was studied by polarising optical microscope (POM) with a heating stage. POM data were compared with differential scanning calorimetry thermograms. In Series-A and -B all compounds exhibit mesomorphism. Series-A compounds exhibit a enantiotropic nematic mesophase, while a smectic A mesophase is obs...
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::1c983600a88cd2dfd756cc8b83e89214 https://doi.org/10.1080/02678292.2012.664175 Zobrazit plný text záznamu