Anion recognition properties of the neutral receptors bearing amide macrocycle

Neutral classes of amide‐based macrocycle have been synthesized and the anion binding abilities are assessed by UV‐vis titration and 1H nmr experiments. Results indicate that higher anion binding abilities are observed for H2PO4−, F− and AcO−, but almost no affinity for Cl−, Br−, I− and OH−. The 1H nmr spectra shows that the interactions between the receptors and fluoride anion depend on two factors, respectively: one is depend on hydrogen bonding, the other on deprotonation.