A C-linked peptidocalix[4]arene bearing four dansyl groups: a highly selective fluorescence chemosensor for fluoride ions

A new C-linked peptidocalix[4]arene functionalized with four l-alanine and dansyl units at the upper rim has been prepared, which exhibited highly selective recognition towards F− along with weaker complexation to AcO− and H2PO4− and no complexation to Cl−, Br−, I−, and HSO4− by fluorescence spectroscopy and 1H NMR method.