Title:	Banana-shaped mesogens: effect of 2-methylresorcinol as the central unit on the mesomorphic properties of five-ring esters
Authors:	Shubashree, S. Sadashiva, B.K. Dhara, Surajit
Issue Date:	Jun-2002
Publisher:	Taylor & Francis
Citation:	Liquid Crystals, 2002, Vol.29, p789 - 797
Abstract:	Three homologous series of banana-shaped five-ring esters and one series of seven-ring esters derived from 2-methylresorcinol have been synthesized. This has been carried out to understand the effect of chemical structure on the mesomorphic properties of such compounds. It is shown that the 2-methyl substituent in the central phenyl ring destabilizes the mesophases when they are compared with those of the analogous unsubstituted compounds. Replacement of a phenyl ring by a biphenyl moiety (seven-ring esters) in the two arms of the bent-core molecule enhances the thermal range of the mesophases as well as the clearing temperatures. The mesophases have been characterized using techniques such as polarizing optical microscopy, differential scanning calorimetry, and X-ray diffraction, and by electro-optical investigations. In the 32 compounds investigated, two mesophases, B 1 and B 2 , have been identified.
Description:	Restricted Access.
URI:	http://hdl.handle.net/2289/2898
ISSN:	0267-8292 1366-5855 (online)
Alternative Location:	http://dx.doi.org/10.1080/02678290210138830
Copyright:	2002 Taylor & Francis
Appears in Collections:	Research Papers (SCM)

Items in RRI Digital Repository are protected by copyright, with all rights reserved, unless otherwise indicated.