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Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/3671

Title: Green chemistry approach to the synthesis of liquid crystalline materials
Authors: Kumar, Sandeep
Bisoyi, Hari Krishna
Pal, Santanu Kumar
Issue Date: Jan-2008
Publisher: Taylor & Francis
Citation: Molecular Crystals and Liquid Crystals, 2008, Vol.480, p287. Paper presented at the International Liquid Crystal Conference 2006, Colorado, USA.
Abstract: This article presents a simple, rapid, economic and environmentally acceptable microwave promoted “green chemistry” approach to the synthesis of some conventional and non-conventional liquid crystalline materials. Alkylation of 4'-hydroxy-4-biphenylcarbonitrile with various alkyl halides under microwave irradiation furnished alkoxycynobiphenyl-based calamitic liquid crystals in very high yield within one minute. Similarly, terminally-functionalized alkoxycyanobiphenyls and alkoxycyanobiphenyl dimers can also be prepared. Microwave irradiation of hexaalkoxytriphenylene in the presence of ionic liquids gives monohydroxy-pentaalkoxytriphenylene in about 30% yield. Novel imidazolium-based ionic liquid crystalline dimers can be easily prepared via quaternization reaction using microwaves. Classical reaction conditions failed to produce these dimers.
Description: Restricted Access.
URI: http://hdl.handle.net/2289/3671
ISSN: E-ISSN: 1563-5287
P-ISSN: 1058-725X
Alternative Location: http://dx.doi.org/10.1080/15421400701826795
Copyright: 2008 Taylor & Francis
Appears in Collections:Research Papers (SCM)

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