Title:	Design and synthesis of novel calamitic and discotic materials based on the photorefractive carbazole unit
Authors:	Manickam, M. Iqbal, P. Spencer, Neil Ashton, P.R. Kumar, Sandeep Donovan, K.J. Preece, J.A.
Keywords:	Anisotropic ordering calamitic liquid crystals carbazole discotic liquid crystals mesogenic photorefractive
Issue Date:	18-Mar-2010
Publisher:	Taylor & Francis
Citation:	Molecular Crystals and Liquid Crystals, 2010, Vol.518, p84
Abstract:	The incorporation of photorefractive molecular units, such as carbazole, into anisotropic materials (liquid crystals) may offer many advantages over conventional electrical poling of photorefractive polymers. Thus, a series of symmetric 3,6-disubstituted carbazole derivatives with well-known biphenyl and triphenylene liquid-crystalline moieties was synthesized and characterized. These modifications were achieved by the esterification of bishydroxy carbazole derivatives with monoalkylated biphenyl carboxylic acids and alkylation of bisacylated bromo- derivatives of carbazole with monohydroxy pentaalkoxy triphenylene. The pure compounds are not liquid-crystalline, even when doped with trinitrofluorenone (TNF), unlike triphenylene/carbazole materials that we reported previously. These compounds, although not liquid-crystalline, may be of interest in the field of photorefractivity.
Description:	Restricted Access.
URI:	http://hdl.handle.net/2289/3988
ISSN:	1563-5287 (Online) 1542-1406
Alternative Location:	http://dx.doi.org/10.1080/15421400903568054
Copyright:	2010 Taylor & Francis
Appears in Collections:	Research Papers (SCM)

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