Observation of a chiral smectic phase in azobenzene-linked bolaamphiphiles containing free sugars

Abraham, S and Paul, S and Narayan, G and Prasad, SK and Rao, DSS and Jayaraman, N and Das, S (2005) Observation of a chiral smectic phase in azobenzene-linked bolaamphiphiles containing free sugars. In: Advanced Functional Materials, 15 (10). pp. 1579-1584.

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Abstract

Amphiphilic sugars exhibit both lyotropic and thermotropic liquid-crystalline behavior. Interestingly, in spite of the abundance of chiral centers in amphiphilic sugars, their liquid-crystalline phases do not exhibit macroscopic chirality. Herein, we report on the first observation of macroscopic chirality in sugar-based bolaamphiphiles containing free hydroxyl groups. The manifestation of the chiral smectic C* phase in these bolaamphiphiles has been observed to be critically dependent on the presence of the azobenzene moiety and the suitable length of the methylene spacer. These results imply that by suitable selection of linker groups, mesogenic bolaamphiphiles possessing macroscopic chirality can be designed using a variety of naturally available sugar derivatives.

Item Type:	Journal Article
Publication:	Advanced Functional Materials
Publisher:	John Wiley and Sons
Additional Information:	Copyright of this article belongs to John Wiley and Sons.
Department/Centre:	Division of Chemical Sciences > Organic Chemistry
Date Deposited:	09 Jun 2010 05:05
Last Modified:	19 Sep 2010 06:00
URI:	http://eprints.iisc.ac.in/id/eprint/27355

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