Reversible Visible-Light Tuning of Self-Organized Helical Superstructures Enabled by Unprecedented Light-Driven Axially Chiral Molecular Switches
作者:Yan Wang、Augustine Urbas、Quan Li
DOI:10.1021/ja211837f
日期:2012.2.22
enantiomeric light-driven azo molecular switches with axial chirality and extended conjugation were found to exhibit unprecedented reversible photoisomerization in both organic-solvent and liquid-crystal media only upon visible-light irradiation. When doped in an achiral liquid crystal with a different concentration, the chiral switch was able either to immediately induce an optically tunable helical superstructure
Pyrimidine derivatives and liquid crystal compositions including same
申请人:Seiko Epson Corporation
公开号:US05200110A1
公开(公告)日:1993-04-06
2-phenyl-5-(4'-trans-cyclohexyl) phenyl pyrimidine derivatives represented by the general formula: ##STR1## wherein R is a straight chain alkyl group having 1 to 10 carbon atoms; X is CN or F; Y is F or H; Z is F or H; and when X is F, at least one of Y and Z is H; and the cyclohexane ring is a trans isomer, exhibiting a nematic phase and having a high nematic phase-isotropic liquid phase transition temperature (N-I Point) and large positive dielectric constant anisotropy (.DELTA..epsilon.). The pyrimidine derivatives may be included in liquid crystal compositions for improved display devices having a wide temperature range, including a high N-I point, a low threshold voltage and a low driving voltage.
Synthesis and Immunomodulating Activity of New Analogues of Fingolimod
作者:Xiang-Jun Feng、Xiao-Ying Yang、Yu Luo、Xin Li、Wei Tang、Jian-Ping Zuo、Wei Lu
DOI:10.1002/ardp.201100092
日期:2012.2
Five new immunomodulators 1a–1e by using a trans‐4‐alkyl‐substituted cyclohexane to replace the flexible C8 alkyl chain of Fingolimod were synthesized. For in‐vitro test, the compounds were dissolved in DMSO as a stock solution and diluted to a desired concentration with RPMI 1640 nutrient solution. For in‐vivo test, the compounds were prepared in pathogen‐free saline containing 0.5% DMSO. These new
Light-driven nanoscale chiral molecular switch: reversible dynamic full range color phototuning
作者:Ji Ma、Yannian Li、Timothy White、Augustine Urbas、Quan Li
DOI:10.1039/c002436h
日期:——
A light-driven nanoscale chiral molecular switch was found to impart its chirality to an achiral liquid crystal host to form a self-organized, optically tunable helicalsuperstructure capable of fast and reversible phototuning of the structural reflection across the entire visible region.
Eine Flüssigkristallphase gemäß Anspruch 1 mit mindestens einer Komponente ausgewählt aus der
Gruppe C bestehend aus den Verbindungen der Formeln VII bis X
weist besonders vorteilhafte Eigenschaften auf.
根据权利要求 1 所述的液晶相,其至少一种成分选自由式 VII 至 X 的化合物组成的 C 组,具有特别优越的特性。