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Issue 29, 2019
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Facile and green synthesis of highly fluorescent nitrogen-doped carbon dots from jackfruit seeds and its applications towards the fluorimetric detection of Au3+ ions in aqueous medium and in in vitro multicolor cell imaging

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Abstract

Carbon dots (CDs) have drawn tremendous attention of researchers due to their excellent properties. Herein, we synthesized highly luminescent N-doped carbon dots (N-CDs) from jackfruit seeds used as a green carbon source by a facile, green and rapid one-step microwave-assisted method. The resulting N-CDs display excellent solubility in water, high photoluminescence (PL) quantum yield, QY (17.91%), high photostability, longer storage stability (stable up to more than 180 days without any agglomeration) and low cytotoxicity (90% upon addition of 0 to 2 mg mL−1 of N-CDs) towards A549 cell line. In addition, the fluorescence of N-CDs is stable in a wide range of ionic strength and pH. The PL intensity of N-CDs was linearly, selectively and sensitively quenched by Au3+ ions. So we have demonstrated Au3+ sensing in aqueous media using N-CDs as the fluorophore and achieved a limit of detection of 239 nM. We also applied the obtained N-CDs as an effective fluorescent probe for in vitro multicolor cell imaging. In addition, we also synthesized gold nanoparticles (AuNPs) by using the strategy of reductive electron transfer between N-CDs and Au3+ ions.

Graphical abstract: Facile and green synthesis of highly fluorescent nitrogen-doped carbon dots from jackfruit seeds and its applications towards the fluorimetric detection of Au3+ ions in aqueous medium and in in vitro multicolor cell imaging

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Publication details

The article was received on 24 May 2019, accepted on 24 Jun 2019 and first published on 25 Jun 2019


Article type: Paper
DOI: 10.1039/C9NJ02590A
New J. Chem., 2019,43, 11710-11719

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    Facile and green synthesis of highly fluorescent nitrogen-doped carbon dots from jackfruit seeds and its applications towards the fluorimetric detection of Au3+ ions in aqueous medium and in in vitro multicolor cell imaging

    K. Raji, V. Ramanan and P. Ramamurthy, New J. Chem., 2019, 43, 11710
    DOI: 10.1039/C9NJ02590A

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