Polymeric Membrane Cesium-Selective Electrodes Based on Quadruply-bridged Calix[6]arenes

Bulletin of the Korean chemical society

Eun Mi Choi¹  Hyejin Oh¹  Seung Whan Ko¹  Kye Chun Nam¹  Seungwon Jeon¹  Yong-Kook Choi¹ 

关键词: Quadruply-bridged calix[6]arene;    Ionophore;    Cesium;    Ion-selective electrode;    Poly(vinyl chloride) membrane.;   

DOI  :  

学科分类：化学（综合）

来源: Korean Chemical Society

【 摘 要 】

New quadruply-bridged calix[6]arenes (I-V) have been studied as cesium selective ionophores in poly(vinyl chloride) (PVC) membrane electrodes. PVC membranes were prepared with dioctyl sebacate (DOS) or 2-nitrophenyl octyl ether (o-NPOE) as the solvent mediator and potassium tetrakis(p-chlorophenyl)borate as the lipophilic salt additive. These ionophores produced electrodes with near-Nernstian slope. The selectivity coefficients for cesium ion with respect to alkali, alkaline earth and ammonium ions have been determined. The lowest detection limit (loga_Cs+ = -6.3) and the higher selectivity coefficient (logk^pot_Cs+,Rb+ = -2.1 by SSM, -2.3 by FIM for calix[6]arene I) for Cs⁺ have been obtained for membranes containing quadruply-bridged calix[6]arenes (I, �?, �?), which have no para t-butyl substituents on the bridging benzene ring.

【 授权许可】

Unknown