Collect. Czech. Chem. Commun. 2001, 66, 1659-1664

Novel Systems for Selective Cation Detection: Application of a Lipophilic Carborane Anion in Polymeric Ion-Selective Electrodes

Martin Krondak, Radko Volf and Vladimír Král*

Institute of Chemical Technology, Prague, Technická 5, 166 28 Prague 6, Czech Republic


Selectivity and sensitivity of PVC membrane electrode are dramatically influenced not only by the specific receptor, but also, mainly for neutral ionophores, by additional lipophilic co-receptor. For cation detection, tetraphenylborate derivatives have been commonly used. Here, we describe novel systems based on conjunction of the classic cation receptors and a highly lipophilic cobalticarborane anionic species. The superiority of this novel co-receptor is demonstrated by application of dibenzo-18-crown-6 and dicyclohexano-18-crown-6 as ionophores in conjunction with the classic lipophilic additive and the novel additive cobalticarborane. The presented data show much higher efficiency which makes this additive co-receptor ideal for cation detection and development of novel sensors.

Keywords: Ion selective electrodes; Ionophores; Co-receptors; Lipophilic additives; Carboranes; Cobalticarborane; Tetraphenylborates.

References: 12 live references.