摘要

A new naphthalimide-based derivative L bearing an S-benzyldithiocarbazate moiety was synthesized as an "off-on" probe for Ag+. The new probe has high binding selectivity for Ag+ in water media with a detection limit of Ag+ down to 270 nM. Based on the Ag+-induced inhibition of a PET process and restriction of C=N rotation, the coordination mode of 1 : 1 between L and Ag+ was proposed.