The influence of lateral substituents on the occurrence of a transition between two polar smectic phases with antiferroelectric properties

Autor:	S. Radhika, R. Pratibha, B. K. Sadashiva, R.N. Keshava Murthy
Rok vydání:	2015
Předmět:	Materials science Substituent General Chemistry Condensed Matter Physics Ring (chemistry) Homologous series chemistry.chemical_compound Crystallography Differential scanning calorimetry chemistry Liquid crystal Polar Organic chemistry Antiferroelectricity General Materials Science Methyl group
Zdroj:	Liquid Crystals. 42:1043-1058
ISSN:	1366-5855 0267-8292
Popis:	The synthesis and mesomorphic properties of two homologous series of bent-core (BC) compounds derived from 2,7-dihydroxynaphthalene are reported. The two series differ from one another by an electron-withdrawing or an electron-donating lateral substituent on the middle phenyl ring of the arms of the BC. Very interestingly, contrasting results are obtained in which polar phases are observed in compounds containing a chloro substituent and apolar smectic C and nematic phases are obtained when this substituent is replaced by a methyl group. The mesophases have been characterised by using a combination of polarised light optical microscopy, differential scanning calorimetry, X-ray diffraction measurements, electro-optical and dielectric studies.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::ebd4e25851745caabbc61dc01c984a1a https://doi.org/10.1080/02678292.2015.1021149 Zobrazit plný text záznamu