Abstract
A novel switch-on fluorescent receptor for bromide was demonstrated and its binding ability toward anions was investigated by fluorescence spectroscopes and 1H NMR titration experiments. Addition of Br− to a DMSO solution of N,N-di-p-bromophenyl-1,10-phenanthroline-2,9-diamide (1) resulted in an enhancement in fluorescence intensity at 377 nm and 396 nm. Two signaling transduction mechanisms were exploited to rationalize quenching and enhancement of the fluorescence emission: inhibition of a photo-induced electronic transfer mechanism (PET) and anion-induced increase of the rigidity of the host molecule.
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This project was supported by the National Natural Science Foundation of China (NO.20371028, NO.20671052).
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Shao, J., Qiao, YH., Lin, H. et al. A novel switch-on fluorescent receptor for bromide based on an amide group. J Incl Phenom Macrocycl Chem 62, 99–103 (2008). https://doi.org/10.1007/s10847-008-9443-3
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DOI: https://doi.org/10.1007/s10847-008-9443-3