Abstract
New chiral receptors 1 and 2 based on ( S)-BINOL and thiourea units were synthesized. The chiral recognition of receptors for chiral anions were studied by fluorescence, UVâvis, and 1H NMR spectra. The results of the non-linear curve fitting indicated that the receptors and guest anions formed a 1:1 stoichiometric complex. The obvious color change of receptor 2 can be observed by the naked eye when the enantiomers of mandelate anions were added, which demonstrates that receptor 2 may be used as a colorimetric sensor for mandelate anions.
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