Abstract
AbstractTwo novel artificial tweezer receptors 1,3‐phenylenedi(carbonylhydrazone) derivatives with a symmetrical structure have been synthesized. Receptor 3a [1,3‐di(salicylidenehydrazinocarbonyl)benzene] for anions (F−, Cl−, Br−, I−, AcO−, HSO4−, H2PO4−, ClO4−) was investigated by UV‐Vis spectroscopy in DMSO and even 85% DMSO‐15% H2O binary solutions, respectively. Remarkable color changes from colorless to yellow were observed by the naked‐eye upon addition of AcO−, F− and H2PO4− to the solution of receptor 3a. The 1H NMR signals indicated that the receptor 3a underwent deprotonation after the addition of an excess of fluoride anion. In particular, the anion recognition was successfully applied to CH3COONa in 15% H2O‐85% DMSO. These findings were expected to be of significance for designing and developing novel color‐based anion sensors operated in aqueous media.
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