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Visible detection of copper ions via fluorescent probe based on red carbon dots and zirconium metal-organic frameworks

Abstract

A highly selective and sensitive ratiometric fluorescent probe for copper ions (Cu2+) in aqueous solution based on a blue zirconium metal-organic framework (UiO-66-(COOH)2) with red carbon dots (R-BF-CQDs) is developed. UiO-66-(COOH)2 displays the broad ligand-centered (LC) emission and R-BF-CQDs shows the red emission respectively. Interestingly, remaining –NH2 at the surface of prepared R-BF-CQDs can coordinate Cu2+ efficiently and produce a strong visible absorption, which overlaps the emission of UiO-66-(COOH)2. Besides, there is a strong coordination capacity of copper ions with R-BF-CQDs and UiO-66-(COOH)2, allowing the space distance between the energy donor and the energy receptor closer. Both of these two conditions provide the possibility of spectral energy transfer. Practically, the LC emission of UiO-66-(COOH)2 becomes weaker with the increasing on concentration of Cu2+, whereas the red fluorescence of R-BF-CQDs increases slightly.

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Publication details

The article was received on 12 Sep 2017, accepted on 12 Oct 2017 and first published on 12 Oct 2017


Article type: Paper
DOI: 10.1039/C7DT03393A
Citation: Dalton Trans., 2017, Accepted Manuscript
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    Visible detection of copper ions via fluorescent probe based on red carbon dots and zirconium metal-organic frameworks

    J. Wu and B. Yan, Dalton Trans., 2017, Accepted Manuscript , DOI: 10.1039/C7DT03393A

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