Controllable self-assemblies of β-cyclodextrin-calix[4]arene couples

Amphiphilic cyclodextrin-calixarene conjugates 1 and 2 were synthesized from "click chemistry", and their self-assembly behaviors were investigated by transmission electron microscopy, and atomic force microscopy. The results obtained show that 1 and 2 can self-assemble to form distinctly different aggregations, and the morphology of aggregations critically relies on the polarity and hydrophilicity of the solvent.     

Synthesis of perylene-bridged bis(dibenzo-24-crown-8) and its assembly behavior with a fullerene-based secondary dibenzylammonium salt

This paper reports the synthesis of a perylene-bridged bis(crown ether) through the condensation reaction between primary amine-armed dibenzo-24-crown-8 and 3,4,9,10-perylenetetracarboxylic dianhydride. Pseudorotaxane with a perylene moiety at the wheel and a fullerene unit in the middle of the axle was prepared, which was evidenced by ¹H NMR and fluorescence experiments. Subsequent investigations show that the formation and disassociation of the pseudorotaxane can be controlled by the alternating addition of KPF₆ and 18-crown-6, following the change of the florescence intensity of perylene.

     

二萘嵌苯桥联双二苯并24冠8的合成及其与富勒烯二级铵盐的组装行为

通过端基为伯胺的臂式二苯并24冠8与苝四甲酸二酐衍生物的缩合反应合成了二萘嵌苯桥联的双冠醚主体.利用核磁、荧光等手段研究了其与富勒烯二级铵盐客体形成准轮烷的组装行为.结果表明,24冠8大环可以键合二级铵盐客体,形成轮上有二萘嵌苯和轴上有富勒烯的准轮烷,KPF6和18冠6的加入可以调控准轮烷的解离和形成,并伴随着荧光强度的改变.     

Supramolecular vesicles of cationic gemini surfactants modulated by p-sulfonatocalix[4]arene

Supramolecular binary vesicles were constructed by host-guest complex formation between p-sulfonatocalix[4]arene and three cationic gemini surfactants, which were identified by UV-vis, dynamic laser scattering, transmission electron microscopy, scanning electron microscopy, atomic force microscopy, and surface tension experiments. The critical aggregation concentration of gemini surfactants decreased pronouncedly by a factor of ca. 1000 owing to the complexation of p-sulfonato-calix[4]arene.