| abstract |
An ion-sensitive compound has the formula A2+B2- wherein A represents a cation capable of forming a receptor-substrate complex with an anion, and B represents one or more counter anions, characterised in that the cation is an anion receptor represented by formula (I) or formula (II) wherein R?1, R2, R3 and R4¿ are each independently hydrogen, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group, an alkylamido group, an arylamido group, an alkylsulfonamido group, an arylsulfonamido group or a nitro group; R?5 and R6¿ are each independently H or a lower alkyl group having from 1 to 4 carbon atoms, or R?5 and R6¿ taken together represent an ethylene bridging group; and n is 0 or 1. Such compounds can be used for sensing anions. |