Substitution Effects on the Liquid Crystalline Properties of Thermotropic Liquid Crystals Containing Schiff Base Chalcone Linkages

Autor:	B. T. Thaker, A. D. Vansadiya, J. B. Kanojiya, Pranay Patel
Rok vydání:	2009
Předmět:	Polarized light microscopy Schiff base Materials science Stereochemistry Mesophase General Chemistry Carbon-13 NMR Condensed Matter Physics Thermotropic crystal chemistry.chemical_compound Homologous series Crystallography chemistry Liquid crystal Proton NMR General Materials Science
Zdroj:	Molecular Crystals and Liquid Crystals. 515:135-147
ISSN:	1563-5287 1542-1406
DOI:	10.1080/15421400903291533
Popis:	Two homologous series of Schiff base Chalcones, Series-A: 1-{4-[(2,4-dihydroxy benzylidene) amino] phenyl}-3-(4-alkoxy phenyl) prop-2-en-1-one and series-B: 1-(4-{[1-(2,4-dihydroxyphenyl)ethylidene]amino}phenyl)-3-(4-methoxyphenyl)prop-2-en-1-one were synthesized and the physical characterization was carried out along with spectroscopic techniques (FT-IR, 1H NMR,13C NMR, and MS). The thermotropic properties were investigated by optical polarized light microscopy and differential scanning calorimetry and evaluated as a function of chain length and linking group. In series-A compounds C3 to C8 exhibit the nematic mesophase while compounds C10, C12, C14, and C16 exhibit a smectic phase as well as the nematic mesophase. Compounds C1 and C2 do not exhibit any mesophase. In series-B, all the compounds (C1 to C8, C10, C12, C14, and C16) exhibit only the nematic mesophase.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::190a6a53a261eee358202c6dac737a98 https://doi.org/10.1080/15421400903291533 Zobrazit plný text záznamu