Carbon dots@metal–organic frameworks as dual-functional fluorescent sensors for Fe3+ ions and nitro explosives

Yufang Tao; Yansong Jiang; Yating Huang; Junning Liu; Ping Zhang; Xiaodong Chen; Yong Fan; Li Wang; Jianing Xu

doi:10.1039/D1CE00392E

Carbon dots@metal–organic frameworks as dual-functional fluorescent sensors for Fe³⁺ ions and nitro explosives†

Yufang Tao,‡^ab Yansong Jiang,

‡^a Yating Huang,^a Junning Liu,^c Ping Zhang,^a Xiaodong Chen,^a Yong Fan,

^a Li Wang

*^a and Jianing Xu*^a

Author affiliations

* Corresponding authors

^a College of Chemistry, Jilin University, Changchun 130012, P. R. China
E-mail: lwang99@jlu.edu.cn, xujn@jlu.edu.cn

^b Shanghai New Epoch High School, Ruian 325206, P. R. China

^c State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012, P. R. China

Abstract

Carbon dots (CDs) with excellent optical properties were encapsulated into two fluorescent metal–organic frameworks (MOFs), namely, [Cd(HL)]·0.8H₂O (1) and [Cd₃(L)₂]·3H₂O (2) (H₃L = 4-(5-carboxypyridin-2-yl)isophthalic acid). The as-prepared CDs@1 and CDs+2 not only retained the strong fluorescence activity of CDs, but also embedded Eu³⁺ ions in the hybrids to form dual-emitting Eu³⁺/CDs@1 and Eu³⁺/CDs+2. These novel composites emitted strong red light at room temperature and exhibited good fluorescence sensing capabilities for Fe³⁺ ions, p-nitrotoluene (p-NT) and 2,4-dinitrophenol (2,4-DNP) in water solutions with detection limits of 0.034 μM, 0.0096 μM, 0.062 μM and 0.0111 μM. These results indicate that 1A and 2A (activated products of Eu³⁺/CDs@1 and Eu³⁺/CDs+2) could be regarded as potential dual-functional fluorescent sensors with superior sensitivity and excellent selectivity.

This article is part of the themed collection: Coordination Networks

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Article information

DOI: https://doi.org/10.1039/D1CE00392E
Article type: Paper
Submitted: 23 Mar 2021
Accepted: 26 Apr 2021
First published: 28 Apr 2021

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CrystEngComm, 2021,23, 4038-4049

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Carbon dots@metal–organic frameworks as dual-functional fluorescent sensors for Fe³⁺ ions and nitro explosives

Y. Tao, Y. Jiang, Y. Huang, J. Liu, P. Zhang, X. Chen, Y. Fan, L. Wang and J. Xu, CrystEngComm, 2021, 23, 4038 DOI: 10.1039/D1CE00392E

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