Calixarene Derivatives for the Complexation of Cesium and Thallium Cations
نویسنده
چکیده
The synthesis and cation-binding properties of a series of Calixarene derivatives possessing alkyl chain groups, ester groups and crown ether rings have been investigated. The syntheses of Calix[4]arene crown ethers and Calix[6]arene derivatives possessing alkyl chain, ester group and crown ether ring have been described. In order to evaluate their monovalent cation binding abilities, solvent extraction of alkali metal and heavy metal picrates between water and dichloromethane has been carried out in order to reveal the effect of substituents, number of aromatic rings and size of crown ether ring. The extractability of metal picrates has been measured. The results showed that introduction of crown ether ring increased the thallium (I) and cesium cation binding ability and selectivity toward other monovalent cations (sodium, potassium and silver). Calix[6]arene-crown ether possessing ester group showed the highest cation-binding ability for thallium (I) and cesium cation in the compounds used in this study.
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