Nanomolar detection of AgI ions in aqueous medium by using naphthalimide-based imine-linked fluorescent organic nanoparticles - application in environmental samples

The synthesis of fluorescent organic nanoparticles (FONPs) with an imine‐linked 1,8‐naphthalimide‐based dipodal chemosensor for AgI is described. The FONPs were prepared by using a re‐precipitation method, and they were successfully applied for the nanomolar detection of AgI ions in aqueous media. More specifically, the chemosensor was utilized for the selective and ratiometric sensing of AgI in a concentration range 15–65 nM with a 15.5 nM detection limit. The work was extended to monitor the AgI concentration in samples of environmental importance.