Cesium selective electrodes based on novel double flexible spacers bridged biscalix[4]arenes

• Published in: Analytica chimica acta Vol. 447; no. 1-2; pp. 41 - 46
• Main Authors: Chen, Langxing, Ju, Hongfang, Zeng, Xianshun, He, Xiwen, Zhang, Zhengzhi
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 26.11.2001; Elsevier
• Subjects: Analytical chemistry; Bridged biscalixarenes; Cesium; Chemistry; Electrochemistry; Electrodes: preparations and properties; Exact sciences and technology; General and physical chemistry; General, instrumentation; Ion selective electrodes; Ion-selective electrode; Bridged biscalixarenes; Cesium; Ion-selective electrode; Performance evaluation; Cesium Complexes; Polymeric membrane; Membrane electrode; Organic ligand; Electromotive force; Calixarene; Chemical sensor; Electrochemical characteristic; Electrochemical detector; Ion selective electrode; Ionic selectivity; Alkali metal Complexes; Electrode potential
• ISSN: 0003-2670; 1873-4324
• DOI: 10.1016/S0003-2670(01)01300-9

Two novel double flexible spacers brideged biscalix[4]arenes 25,25′,27,27′-bis(1,3-dioxypropane)-bis(5,11,17,23-p-tert-tetrabutylcalix[4]arene-26,28-diol) (1) and 25,25′,27,27′-bis(1,4-dioxybutane)-bis(5,11,17,23-p-tert-tetrabutylcalix[4]arene-26,28-diol) (2) have been evaluated as cesium ion-selective ionophore in polymeric membrane electrodes. The electrodes all give the good Nernstian response of 51mV per decade for Cs+ in the concentration range from 1×10−1 to 1×10−5M and good selectivity. The potentiometric selectivity of Cs+-ISEs based on 1 and 2 for cesium ion over other alkali metal ions, alkaline-earth metal ions and NH4+ have been assessed. Effects of membrane composition and pH on the response of Cs+-ISEs based on 1 and 2 were also discussed.