Potassium selective calix[4]semitubes |
| |
Authors: | Webber Philip R A Cowley Andrew Drew Michael G B Beer Paul D |
| |
Institution: | Department of Chemistry, Inorganic Chemistry Laboratory, University of Oxford, South Parks Road, Oxford OX1 3QR, UK. |
| |
Abstract: | A new class of ionophore consisting of two calix4]arene units linked through the lower rim by two ethylene chains, in combination with propyl ether and phenolic functional groups, has been developed. These calix4]semitube molecules exhibit remarkable selectivity and fast complexation kinetics for potassium over all Group 1 metal cations. Molecular modelling studies, using structural models derived from crystallographic data, suggest the potassium cation is complexed by a horizontal, side-on route and not through the calix4]arene annulus. The length of the bridging alkylene chain between the respective calix4]arenes of the semitube structure dictates the strength and selectivity of alkali metal cation binding. |
| |
Keywords: | alkali metals calixarenes ionophores potassium supramolecular chemistry |
本文献已被 PubMed 等数据库收录! |
|