Journal
INORGANIC CHEMISTRY
Volume 49, Issue 15, Pages 6808-+Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ic1004165
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Funding
- U.S. National Science Foundation [0449699]
- Sloan Foundation
- Camille and Henry Dreyfus Foundation
- U.S. National Institutes of Health [GM084176]
- Direct For Mathematical & Physical Scien
- Division Of Chemistry [0449699] Funding Source: National Science Foundation
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A new type of Cu2+ fluorescent sensor, courage, has been prepared with a photosensitive nitrophenyl group incorporated into the backbone of a coumarin-tagged tetradentate ligand. Coucage provides a selective fluorescence response for Cu2+ over other biologically relevant metal ions. Coordination of Cu2+ dims the fluorescence output until irradiation with UV light cleaves the ligand backbone, which relieves the copper-induced quenching to provide a turn-on response. Experiments in live MCF-7 cells show that coucage can be used for detecting changes in intracellular Cu2+ upon the addition of excess exogenous copper. If improvements can be made to increase its affinity for copper, this new type of turn-on sensor could be used as a tool for visualizing the cellular distribution of labile copper to gain insight into the mechanisms of copper trafficking.
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