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Issue 21, 2016
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Microwave-assisted facile synthesis of yellow fluorescent carbon dots from o-phenylenediamine for cell imaging and sensitive detection of Fe3+ and H2O2

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Abstract

Strongly yellow fluorescent carbon dots (CDs) have been directly synthesized from o-phenylenediamine (o-PD) through a facile microwave-assisted method. The as-prepared o-CDs exhibit excitation-dependent photoluminescent behavior and excellent water-solubility due to some amino or hydroxy functional groups on the surface. An emission peak appears at 573 nm when the o-CDs solution is excited at 400 nm, and the quantum yield (QY) is 38.5%. Owing to their low toxicity and water solubility the as-prepared o-CDs can be directly used for cell imaging. More importantly, the as-prepared o-CDs solution also shows sensitivity for H2O2. The limits of detection (LOD) for Fe3+ and H2O2 are 16.1 nM and 28.1 nM, respectively, which is much lower than what's reported in previous studies. The fluorescence intensity also shows a dependence on pH and the strongest fluorescence intensity appears at pH 9. In addition, we also find that the fluorescent properties of CDs prepared from m-phenylenediamine (m-PDs) and p-phenylenediamine (p-PDs) are quite different from those of o-CDs.

Graphical abstract: Microwave-assisted facile synthesis of yellow fluorescent carbon dots from o-phenylenediamine for cell imaging and sensitive detection of Fe3+ and H2O2

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Publication details

The article was received on 28 Jan 2016, accepted on 02 Feb 2016 and first published on 03 Feb 2016


Article type: Paper
DOI: 10.1039/C6RA02554D
Citation: RSC Adv., 2016,6, 17704-17712
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    Microwave-assisted facile synthesis of yellow fluorescent carbon dots from o-phenylenediamine for cell imaging and sensitive detection of Fe3+ and H2O2

    L. Song, Y. Cui, C. Zhang, Z. Hu and X. Liu, RSC Adv., 2016, 6, 17704
    DOI: 10.1039/C6RA02554D

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