A rhodamine-based fluorescent sensor for selective detection of Cu2+ in aqueous media: synthesis and spectroscopic properties.

ABSTRACT: Two new chemosensors, rhodamine B derivative bearing 3-formyl-6-nitrochromone (L1 ) and 3-formyl-6-methylchromone (L2 ) units were designed and synthesized using microwave irradiation for the selective detection of Cu2+ in aqueous media. Copper triggers the formation of highly fluorescent ring-open spirolactam. The fluorescence intensity was remarkably increased upon the addition of Cu2+ within a minute, while the other metal ions caused no significant effect. More importantly, the resulting complexes can be used as a reversible fluorescence sensor for CN-. The recognition ability of the sensors was investigated by fluorescence titration, Job's plot, 1H NMR spectroscopy and density functional theory (DFT) calculations.

SUBMITTER: Abebe F 

PROVIDER: S-EPMC7324018 | biostudies-literature | 2020 Apr

REPOSITORIES: biostudies-literature