bent-core hexacatenars containing a diphenyl ketone/diphenylmethylene malononitrile as central group and two α-cyanostilbene units as molecular arm were synthesized by Suzuki coupling and Knoevenagel reactions. The effect of the central groups on the liquidcrystalline and photophysical behaviors was investigated in detail. POM, DSC and XRD results indicated that all the compounds could self-assemble
Amphiphilic azobenzenes self-assemble into double layer smectic and hexagonal columnar liquid crystalline phases, which are modified by protic solvents and light irradiation.
Elucidating the Structure of the<i>Pm</i>$\bar 3$<i>n</i>Cubic Phase of Supramolecular Dendrimers through the Modification of their Aliphatic to Aromatic Volume Ratio
作者:Virgil Percec、Mihai Peterca、Yusuke Tsuda、Brad M. Rosen、Satoshi Uchida、Mohammad R. Imam、Goran Ungar、Paul A. Heiney
DOI:10.1002/chem.200901324
日期:2009.9.14
lattices generated from the supramoleculardendrimers demonstrated that the volume of the aromatic core of the sphericaldendrimers is not dependent on the number of carbon atoms from their alkyl groups. This result facilitated the calculation of the average values of the absolute electron density of the aliphatic and aromatic domains of the sphericalsupramoleculardendrimers. The relative intensity of
azobenzene core were synthesized efficiently by copper-catalyzed azide-alkyne cycloaddition (CuAAC) reaction. These compounds can self-assemble into SmC and Colhex/p6mm liquid-crystalline phases, and form multistimuli responsive organogels. Bicontinuous cubic phase (CubV) could be induced in the binary system of a bicatenar compound with SmC phase and a hexacatenar compound with Colhex/p6mm phase. Photophysical
通过铜催化的叠氮化物-炔烃环加成反应(CuAAC)有效地合成了由三唑偶氮苯核组成的两类新型聚对苯二酚染料。这些化合物可以自组装成SmC和Col hex / p 6 mm液晶相,并形成多刺激响应性有机凝胶。双连续立方相(Cub V)可以在具有SmC相的双catenar化合物和具有Col hex / p 6 mm相的hexacatenar化合物的二元体系中诱发。光物理研究表明,这些化合物在溶液状态,液晶状态和凝胶状态下具有可逆的光响应特性。它们还可以充当Fe的化学传感器3+和连二亚硫酸钠具有高选择性。
Triblock Polyphiles through Click Chemistry: Self-Assembled Thermotropic Cubic Phases Formed by Micellar and Monolayer Vesicular Aggregates
in the number of molecules involved in the spherical aggregatesformed by compounds with long and short cores. Whereas the aggregates in the cubicphases of the compounds with short rod units are small and could be regarded as micellar, the long‐core compounds form much larger aggregates which are regarded as a kind of monolayervesicularaggregate.