Manganese-doped carbon quantum dots-based fluorescent probe for selective and sensitive sensing of 2,4,6-trinitrophenol via an inner filtering effect

Huanhuan Fan; Guo Qiang Xiang; Yule Wang; Heng Zhang; Keke Ning; Junyue Duan; Lijun He; Xiuming Jiang; Wenjie Zhao

doi:10.1016/j.saa.2018.07.006

Manganese-doped carbon quantum dots-based fluorescent probe for selective and sensitive sensing of 2,4,6-trinitrophenol via an inner filtering effect

Spectrochim Acta A Mol Biomol Spectrosc. 2018 Dec 5:205:221-226. doi: 10.1016/j.saa.2018.07.006. Epub 2018 Jul 10.

Authors

Huanhuan Fan¹, Guo Qiang Xiang², Yule Wang¹, Heng Zhang¹, Keke Ning¹, Junyue Duan¹, Lijun He¹, Xiuming Jiang¹, Wenjie Zhao¹

Affiliations

¹ School of Chemistry and Chemical Engineering, Henan University of technology, Zhengzhou, 450001, PR China.
² School of Chemistry and Chemical Engineering, Henan University of technology, Zhengzhou, 450001, PR China. Electronic address: xianggq@haut.edu.cn.

PMID: 30015029
DOI: 10.1016/j.saa.2018.07.006

Abstract

In the present work, a selective and sensitive method for detecting TNP using manganese doped carbon quantum dots (Mn-CDs) was developed. The Mn-CDs were prepared via a simple hydrothermal method using 1-(2-pyridinylazo)-2-naohthalenol naohthalenol (PAN) and MnCl₂ as precursors. The as-prepared Mn-CDs have UV emission with high quantum yield (83.2%). Because of the strong characteristic absorption of TNP at 356 nm, which has good spectral overlap with the emission peak of Mn-CDs, the fluorescence intensity of Mn-CDs at 360 nm is linearly quenched in the presence of TNP in the concentration range of 0.1-200 μM. The developing assay based on an inner filter effect (IFE) mechanism for detecting TNP is selective, convenient, and shows that the as-prepared Mn-CDs have application prospects for simple and specific analytical chemistry.

Keywords: Carbon quantum dots; Inner filtering effect; Trinitrophenol; Water samples.