Abstract
A new anion receptor bearing phenolic hydroxy group based on 3,5-ditertbutylsalicylaldehyde-p-nitrophenylhydrazone (1) was designed and synthesized. Upon addition of AcO− and F−, the receptor exhibited visible color changes from deep yellow to purple. However, no obvious color changes were observed on addition of the other anions tested (H2PO4−, Cl−, Br−, I−). The binding properties of the receptor with anions such as AcO− and F− were investigated by UV-Vis and fluorescent titrations. The result indicated that the receptor 1 had a higher affinity to AcO− and F− and a 1:1 host-guest complex was formed through H-bond interactions between 1 and anions.
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