Design and Synthesis of Novel Calamitic and Discotic Materials Based on the Photorefractive Carbazole Unit
摘要:
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.
AN EFFICIENT, FACILE, AND FAST SYNTHESIS OF 4-ALKOXY-4′-HYDROXYBIPHENYLS
摘要:
A simple, fast and efficient method of synthesis of 4-alkoxy-4'-hydroxybiphenyls has been described. The reactions of 4,4'-dihydroxybiphenyl with appropriate alkyl halides were carried out over 3 h in DMSO in presence of solid powdered KOH.
4-Semifluoroalkoxybiphenyl derivatives 1 and 2(n) (n = 4–6, 8 and 10) were designed, synthesized and their physic-chemical properties were examined. The effects of chemical structure on liquidcrystalline and gelation properties were investigated. The clear point for 2(n) declines as the carbon number of terminal alkoxyl chain enlarges from 4 to 10. The clear point for 2(4) is 172 °C while 2(10) is
Alkylendioxythiophene und Poly(alkylendioxythiophene) mit mesogenen Gruppen
申请人:Bayer Chemicals AG
公开号:EP1440974A3
公开(公告)日:2004-09-15
Die Erfindung betrifft neue 3,4-Alkylendioxythiophene gegebenenfalls über ein Bindeglied substituiert mit mesogenen Gruppen und deren polymere Derivate (Poly-(3,4-alkylendioxythiophene)).
4-Perfluoroalkylbutoxybenzene derivatives as a smart soft material show efficient and rapid phase-selective gelation ability from water at extremes of pH.
Novel ferrocene diesters with liquid-crystal properties
作者:J. Bhatt、B. M. Fung、K. M. Nicholas、C.-D. Poon
DOI:10.1039/c39880001439
日期:——
A series of bis-(4-alkoxy-4′-biphenyl)ferrocene 1,1′-diesters (1) has been synthesized; three compounds in this homologous series exhibit liquid-crystal phases.
Triazole compounds and methods of making and using the same
申请人:Bhattacharjee Ashoke
公开号:US20100016955A1
公开(公告)日:2010-01-21
The present invention provides triazole macrocyclic compounds useful as therapeutic agents. More particularly, these compounds are useful as anti-infective, anti-proliferative, anti-inflammatory, and prokinetic agents.