All-solid-state Ag+-ISE based on [2,2.2]p,p,p-cyclophane

All-solid-state ion-selective electrodes (ISEs) based on two ionophores wit h similar structure, i.e., [2.2.2] p,p,p-cyclophane and [2.2.2]m,p,p-cyclop hane, were prepared and investigated. The ion-selective membranes were comp osed of the corresponding ionophore (1%), potassium tetrakis(4-chlorophenyl )borate (0.5%), 2-nitrophenyl octyl ether (65-66%), and PVC (33%). The ion- selective membrane was placed on top of a layer of the ct inducting polymer , poly(3,4-ethylenedioxythiophene) (PEDOT), working as ion-to-electron tran sducer. The resulting all-solid-state ISEs were conditioned in 0.01 M AgNO3 and investigated as Ag+-ISEs. The results show that [2.2.2]p,p,p-cyclophan e is much more selective to Ag+ than [2.2.2]m,p,p-cyclophane.