Abstract
A quinoline-based simple receptor (bis(2-quinolinylmethyl)benzylamine=1) as a Zn2+ selective fluorescent chemosensor showed a large fluorescent enhancement with a blue shift in the presence of Zn2+ which is attributed to a chelation enhanced fluorescence (CHEF) effect with inhibition of a photoinduced electron transfer (PET) process of 1. In particular, this receptor could clearly distinguish Zn2+ from Cd2+. The binding mode of 1 and Zn2+ was found to be a 1:1 and confirmed by Job plot, 1H NMR titration and ESI-mass spectrometry analysis.
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