A chiral cage is proposed as an effective chiroptical sensor for perrhenate (surrogate for 99TcO4−) in water, fruit juice and artificial urine media. The key mechanism for the chiroptical sensing resides in the change of dihedral angle of the binaphthyl unit and H-bonds with the guest, resulting in ample changes of the CD signal as a consequence of the binding event.
R. Mobili, G. Preda, S. La Cognata, L. Toma, D. Pasini and V. Amendola, Chem. Commun., 2022, 58, 3897 DOI: 10.1039/D2CC00612J
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