Pillar[5]arene-based [1]rotaxane: high-yield synthesis, characterization and application in Knoevenagel reaction
作者:Xu-Sheng Du、Chun-Yu Wang、Qiong Jia、Rong Deng、Hua-Sheng Tian、Hou-Yu Zhang、Kamel Meguellati、Ying-Wei Yang
DOI:10.1039/c7cc02364b
日期:——
We report a quantitative synthetic strategy of [1]rotaxane from a representative pseudo[1]rotaxane. The structure of the [1]rotaxane was characterized by 1H NMR, 13C NMR, 2D NMR, mass spectroscopy, and melting...
A new copillar[5]arene-coupled rhodamine probe 1 shows selective sensing of Hg2+ ions over a series of metal ions in CH3CN by exhibiting color change of the solution as well as turn on fluorescence. It also shows interaction with Cu2+ by exhibiting different color and spectral change. Tetrabutylammonium iodide distinguishes between Hg2+ and Cu2+ ions.
complexation and self-inclusion properties were studied by 1H NMR and 2D nuclear overhauser effect spectroscopy (NOESY) NMR measurements. The results showed that the substituents on their phenolic units have a great influence on the self-assembly of both pillar[5]arenes, although they both could form stable pseudo[1]rotaxanes at room temperature. When eight bulky 4-brombutyloxy groups were capped on the
of monoester copillar[5]arenes depends on the position of the ester group, which causes different guest selectivities. Monoester copillar[5]arenes bearing an acetate chain can form stable self‐inclusion complexes in low‐ and high‐concentration solution and exhibit high guest selectivity. However, a monoester copillar[5]arene bearing a butyrate chain can not form a self‐inclusion complex and exhibits