申请人:The Secretary of State for Defence in Her Britannic Majesty's Government of the United Kingdom of Great Britain and Northern Ireland Defence Evaluation Research Agency
公开号:US06337420B1
公开(公告)日:2002-01-08
An electroclinic device having two spaced cell walls each bearing electrode structures and treated on at least one facing surface with an alignment layer, a layer of a smectic liquid crystal material enclosed between the cell walls, where the liquid crystal material contains one or more of the compounds described by formula I as defined in the specification.
Sonication of a mixture of magnesium powder, 1,2-dibromoethane, aryl bromide and diethyl dicarbonate in THF followed by treatment with BF3·OEt2 at room temperature afforded aryl ester with reasonable yield. A series of aryl bromides were investigated and transformed to their corresponding aryl esters under the reaction conditions.
1,3-Dipolar cycloaddition reaction applied to synthesis of new unsymmetric liquid crystal compounds-based isoxazole
作者:André A. Vieira、Fernando R. Bryk、Gilmar Conte、Adailton J. Bortoluzzi、Hugo Gallardo
DOI:10.1016/j.tetlet.2008.12.021
日期:2009.2
ring compounds exhibited mesomorphism. Smectic C, smectic A, and nematic phases were observed by optical microscopy and DSC analysis. The yield of these reactions varied from moderate to excellent (47–93%). The structure of the rigid core was investigated by single crystal X-ray diffraction, which confirmed the regioselectivity of the [3+2] dipolar cycloaddition reaction.
作者:Laura de Vega、Pedro D. Ortiz、Gunther Hennrich、Ana Omenat、Rosa M. Tejedor、Joaquín Barberá、Berta Gómez-Lor、José Luis Serrano
DOI:10.1021/jp1004727
日期:2010.4.15
phenylacetylene extended biphenyl mesogens substituted with different chiral alkoxy chains, starting from commercially available 4-(4′-bromophenyl)phenol. Depending on the position of the chiral center and the polar nature of the target molecules as determined by the electron withdrawing end-groups, different types of smectic liquidcrystals are formed. The liquidcrystal phases are fully characterized
Abstract New nonlinear compounds containing 1,4‐diaryl‐[1,2,3]‐triazole were prepared using a straightforward and efficient method for the regioselective synthesis of [1,2,3]‐triazoles. The methodology consists of a Cu(I)‐catalyzed 1,3‐dipolarcycloaddition of arylazides to terminal arylacetylenes (click reaction). All compounds exhibited liquid‐crystalline profile.