A novel perylene-bisimide dye as 'turn on' fluorescent sensor for Hg~(2+) ion found in DMF/H2O

摘要

A highly efficient and selective perylene-bisimide sensor bearing thiophene units as the metal ion receptor is reported for the detection of Hg~(2+) ion. This sensor displays a rapid and highly selective "turn -on" response based on photoinduced electron transfer (PET) mechanism. Fluorescence enhancement by factors 20 times is achieved upon selective interaction with Hg~(2+) ion over other metal ions in aqueous solutions.