Design and Synthesis of Novel Calamitic and Discotic Materials Based on the Photorefractive Carbazole Unit
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Colleges, School and Institutes
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.
|Number of pages||17|
|Journal||Molecular Crystals and Liquid Crystals|
|Publication status||Published - 1 Jan 2010|
- photorefractive, calamitic liquid crystals, AFM, oligonucleotides, photolysis, mesogenic, DNA, SAM, carbazole, discotic liquid crystals, Anisotropic ordering