Molecular materials: a new type of polar membrane for the titration of ions

Abstract

The synthesis of a new type of polar membrane having a low glass-transition temperature is described. It is obtained by room-temperature crosslinking between two cyanopropylsiloxane copolymers containing SiCHCH₂ and SiH reactive groups. Conventional ionophores and electrolytes may be molecularly dissolved in the copolymers. The crosslinked membrane is used as a supporting matrix in ion-selective electrode devices. The best results are obtained when benzo-15-crown-ether-5 is employed as ionophore.