Synthesis, structure-fluorescence relationships and density functional theory studies of novel naphthalimide-piperazine-pyridine-based polystyrene sensors for Hg(ii) detection.

ABSTRACT: Two novel naphthalimide-piperazine-pyridine-based polystyrene solid-phase fluorescent sensors PS-NA and PS-ND with different lengths of the linker were synthesized and shown to be able to detect Hg(ii) ions. Their structures were characterized by Fourier transform infrared (FTIR) spectroscopy and scanning electron microscopy (SEM) analysis. Fluorescence properties, including response time, pH effects, fluorescence titration, metal ion selectivity and regeneration, were investigated and compared. Sensor PS-NA displayed a higher fluorescence response to Hg(ii) than PS-ND, with a lower detection limit of 1.01 μM. The detection mechanism involving the Hg(ii) chelation-induced photo-induced electron transfer (PET) was proposed with the aid of density functional theory (DFT) calculations. Sensor

SUBMITTER: Liu Y 

PROVIDER: S-EPMC9055249 | biostudies-literature | 2020 Jun

REPOSITORIES: biostudies-literature