Selective ion probe for Mg~(2+) based on Au(I)• • •Au(I) interactions in a tripodal alkynylgold(I) complex with oligoether pendants

摘要

A simple but novel tripodal alkynylgold(I) complex with oligoether pendants has been synthesized and demonstrated to be a selective ion probe for Mg~(2+) based on Au(I)• • •Au(I) interactions.rnDesign of chemosensors for the selective detection of biologically important cations such as Na~+ , K~+ , Mg~(2+) and Ca~(2+) is a topic of considerable interest. Macrocyclic receptors are the widely used cation-binding sites in these systems, while chromophore-linked pseudomacrocycle- or podand-based chemosensors are relatively less well explored. Signal transduction is another critical issue in the design of cation-specific chemosensors. In the majority of the chemosensors reported so far, the signaling of the binding event is achieved by photoinduced electron transfer, photoinduced charge-transfer, or chromophore (excimer) interaction.