Supramolecular Probe for Bicarbonate Exhibiting Anomalous Pyrene Fluorescence in Aqueous Media

摘要

In the last two decades,noteworthy developments in supramo-lecular chemistry have resulted in molecular assemblies capable of recognizing both neutral and ionic species.Whereas the recognition of ionic species in organic media is well documented,that in aqueous media remains a challenging task because the highly polar nature of an aqueous solution weakens the driving forces for capturing ionic species,except metal coordination.Several excellent metal-free receptors for ionic species that function well in aqueous media have appeared.For instance,cationic polyamines are well-established receptors for anionic phosphates and carboxylates.