Red-Emitting Carbon Dots as a Dual Sensor for In3+ and Pd2+ in Water

Shweta Pawar; Sravani Kaja; Amit Nag

doi:10.1021/acsomega.0c00883

Red-Emitting Carbon Dots as a Dual Sensor for In³⁺ and Pd²⁺ in Water

Shweta Pawar, Sravani Kaja, Amit Nag

Birla Institute of Technology and Science Pilani

Research output: Contribution to journal › Article › peer-review

37 Scopus citations

Abstract

We have demonstrated the synthesis, characterization, and application of nitrogen-doped red-emitting carbon dots (NRCDs) for dual sensing of indium (In³⁺) and palladium (Pd²⁺) in water. The detection of In³⁺ was associated with "turn-on" fluorescence response with a red shift, while in the presence of Pd²⁺, the fluorescence intensity of NRCDs was quenched to show a "turn-off" response. The interaction of NRCDs with the metal ions was investigated using ¹H nuclear magnetic resonance and Fourier-transform infrared spectroscopy studies. The synthesized nanoprobes possessed good biocompatibility and photostability and were found to be suitable candidates for bioimaging due to their emission profiles in the near-infrared (NIR) window. Applicability of the as-prepared NRCDs was demonstrated in the NIR region when they were loaded in vesicle membranes with and without cations and subjected to confocal imaging successfully.

Original language	English
Pages (from-to)	8362-8372
Number of pages	11
Journal	ACS Omega
Volume	5
Issue number	14
DOIs	https://doi.org/10.1021/acsomega.0c00883
State	Published - 14 Apr 2020
Externally published	Yes

Bibliographical note

Publisher Copyright:
Copyright © 2020 American Chemical Society.

Funding

S.P. thanks the DST-INSPIRE (IF150605) scheme for providing senior research fellowship. The authors gratefully acknowledge the support from the Department of Science and Technology, India, for the FIST grant SR/FST/CSI-240/2012. The Central Analytical Facility of BITS Pilani Hyderabad Campus is gratefully acknowledged for H NMR, XPS, and TCSPC experiments. 1 S.P. thanks the DST-INSPIRE (IF150605) scheme for providing senior research fellowship. The authors gratefully acknowledge the support from the Department of Science and Technology, India for the FIST grant SR/FST/CSI-240/2012. The Central Analytical Facility of BITS Pilani Hyderabad Campus is gratefully acknowledged for 1H NMR, XPS, and TCSPC experiments.

Funders	Funder number
DST-INSPIRE	IF150605
FIST	SR/FST/CSI-240/2012
Department of Science and Technology, Ministry of Science and Technology, India
Department of Science and Technology, Government of Kerala

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10.1021/acsomega.0c00883

Cite this

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