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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
discotic liquid crystals
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.
ISSN: 1563-5287 (Online)
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Copyright: 2010 Taylor & Francis
Appears in Collections:Research Papers (SCM)

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