Issue 32, 2023

A highly thermal and pH-stable fluorescence sensor for rapid detection of Hg2+, Fe3+, and tetracycline in aqueous solutions

Abstract

Under solvothermal conditions, one new CdII coordination polymer [Cd(bbimc)(ata)]n (1)] based on carbazole ligand 3,6-bis(1H-benzo[d]imidazol-1-yl)-9-methyl-9H-carbazole (bbimc) and 2-aminoterephthalic acid ligand (H2ata) was synthesized. Single-crystal structural determination revealed that 1 takes a two-dimensional (2D) structure with an sql topology. In particular, 1 shows good thermal (413 °C) and excellent acid/base stability in aqueous solutions with pH values of 1–13. Furthermore, 1 could selectively detect Hg2+, Fe3+, and antibiotics (TC: tetracycline; CTC: chlortetracycline) in aqueous solutions with high selectivity and sensitivity through a turn-off effect, and the detection limits are 0.246 μM (Hg2+), 0.342 μM (Fe3+), 0.208 μM (TC), and 0.307 μM (CTC). Moreover, the detection mechanism analysis by experiment and theoretical calculation revealed that competitive absorption (CA) and photoinduced electron transfer (PET) are largely responsible for sensing Fe3+ and the two antibiotics (TC, CTC). However, the weak interaction between Hg2+ and –NH2 of the framework structure contributes to partial luminescence quenching.

Graphical abstract: A highly thermal and pH-stable fluorescence sensor for rapid detection of Hg2+, Fe3+, and tetracycline in aqueous solutions

Supplementary files

Article information

Article type
Paper
Submitted
07 Jun 2023
Accepted
13 Jul 2023
First published
13 Jul 2023

CrystEngComm, 2023,25, 4531-4538

A highly thermal and pH-stable fluorescence sensor for rapid detection of Hg2+, Fe3+, and tetracycline in aqueous solutions

X. Sun, C. Li, X. Meng, D. Wang and C. Zheng, CrystEngComm, 2023, 25, 4531 DOI: 10.1039/D3CE00571B

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements