K. Kimura, Kenta Tatsumi, M. Yokoyama, M. Ouchi, M. Mocerino
{"title":"Remarkable thallium(I) selectivity for ion sensors based on π-coordination of calix[4]arene neutral carriers","authors":"K. Kimura, Kenta Tatsumi, M. Yokoyama, M. Ouchi, M. Mocerino","doi":"10.1039/A902803J","DOIUrl":null,"url":null,"abstract":"Calix[4]arene derivatives have been applied as neutral carriers for thallium(I)-selective electrodes, taking advantage of their π-coordination. Calix[4]arene derivatives without any t-butyl group at the upper rim, such as calix[4]arene tetra(propyl ether) and tetra(allyl ether), provided the thallium(I)-selective electrodes with high sensitivity and ion selectivity. t-Butylcalix[4]arene derivatives employed here did not afford very good results as for the thallium(I) neutral carrier. 1H-NMR spectroscopy indicated that thallium(I) complexation by the calixarene neutral carriers is made primarily by π-coordination of their skeletal aromatic rings. The ion-selective electrode based on calix[4]arene tetra(propyl ether) was successfully applied to thallium(I) assays in human urine.","PeriodicalId":7814,"journal":{"name":"Analytical Communications","volume":"5 1","pages":"229-230"},"PeriodicalIF":0.0000,"publicationDate":"1999-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"39","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Analytical Communications","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1039/A902803J","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 39
Abstract
Calix[4]arene derivatives have been applied as neutral carriers for thallium(I)-selective electrodes, taking advantage of their π-coordination. Calix[4]arene derivatives without any t-butyl group at the upper rim, such as calix[4]arene tetra(propyl ether) and tetra(allyl ether), provided the thallium(I)-selective electrodes with high sensitivity and ion selectivity. t-Butylcalix[4]arene derivatives employed here did not afford very good results as for the thallium(I) neutral carrier. 1H-NMR spectroscopy indicated that thallium(I) complexation by the calixarene neutral carriers is made primarily by π-coordination of their skeletal aromatic rings. The ion-selective electrode based on calix[4]arene tetra(propyl ether) was successfully applied to thallium(I) assays in human urine.