Altered selectivity of a dipicolylamine based metal ion receptor†
Abstract
2,2-Dipicolylamine (DPA) based receptors detect Zn2+ with high fidelity. A fluorescent sensor with thiocarbamate-linked DPA turns it into a highly selective module for Ag+ with up to ∼7-fold enhancement of fluorescence. The sensor exhibits a double ratiometric behavior. It also displays an interesting [Ag+] dependent aggregation induced emission.