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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 (L 1 ) and 3-formyl-6-methylchromone (L 2 ) 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

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

Abebe Fasil F Perkins Pierce P Shaw Roosevelt R Tadesse Solomon S

Journal of molecular structure 20191216

Two new chemosensors, rhodamine B derivative bearing 3-formyl-6-nitrochromone (L 1 ) and 3-formyl-6-methylchromone (L 2 ) 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 me ...[more]

PMID: 32601506

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