Journal
CHEMICAL COMMUNICATIONS
Volume 56, Issue 97, Pages 15337-15340Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0cc06750d
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Funding
- National Natural Science Foundation of China [21974018, 21727811, 22074011]
- Fundamental Research Funds for Central Universities [N2005015, N2005027]
- Liaoning Revitalization Talents Program [XLYC1907191, XLYC1802016]
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Redox cyclings between mono-/di-valent copper oxidation states occur in electron transfer reactions that underlie their biological functions. We report herein a dual channel fluorescent nanoprobe for the detection of mono- and di-valent copper ions. The probe, BSA-CDs@RBH/BCS, is designed by decorating carbon dots (CDs) on BSA encapsulated rhodamine hydrazide (RBH) and conjugating with bathocuproine disulfonate (BCS). Cu2+ catalyzes the hydrolysis of RBH, and the formed rhodamine B (RhB) shows emission at lambda(ex)/lambda(em) = 360/575 nm which ensures Cu2+ detection. BSA reduces Cu2+ to Cu+ and the BCS-Cu+ chelate shows emission at lambda(ex)/lambda(em) 360/450 nm which ensures Cu+ assay. Thus, the dual-channel fluorescence enables speciation of Cu2+ and Cu+.
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