Issue 61, 2020

Tb(iii)-doped nanosheets as a fluorescent probe for the detection of dipicolinic acid

Abstract

A new fluorescent probe based on terbium(III)-doped nanosheets was designed for detecting low-levels of dipicolinic acid (DPA), a biomarker of bacterial spores. The ability to detect ultra-low concentrations of DPA is therefore of great significance. First, Tb(III)-doped ytterbium hydroxide nanosheets were obtained by mechanical exfoliation from layered rare-earth hydroxide (LRH) materials. The morphology of the as-synthesized nanosheets was studied by transmission electron microscopy and atomic force microscopy. The Tb(III)-doped nanosheets are demonstrated to be highly sensitive to DPA, which remarkably enhances Tb(III) luminescence intensities at a wavelength of 544 nm. Furthermore, Tb(III) emission increases linearly with DPA concentration. Selectivity studies were conducted by adding different competing aromatic ligands to the sensing solution; however, their fluorescence responses were observed to be negligibly small in comparison with that of DPA. Our findings provide a basis for the application of Tb(III)-doped nanosheets for accurate, sensitive, and selective monitoring of DPA as a biomarker of anthrax.

Graphical abstract: Tb(iii)-doped nanosheets as a fluorescent probe for the detection of dipicolinic acid

Article information

Article type
Paper
Submitted
20 Nov 2019
Accepted
01 Oct 2020
First published
12 Oct 2020
This article is Open Access
Creative Commons BY-NC license

RSC Adv., 2020,10, 37500-37506

Tb(III)-doped nanosheets as a fluorescent probe for the detection of dipicolinic acid

B. Wang, J. Xia, G. Zhou, X. Li, M. Dai, D. Jiang and Q. Li, RSC Adv., 2020, 10, 37500 DOI: 10.1039/C9RA09695G

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