Issue 22, 2020

A highly stable 8-hydroxyquinolinate-based metal–organic framework as a selective fluorescence sensor for Fe3+, Cr2O72− and nitroaromatic explosives

Abstract

An 8-hydroxyquinolinate-based metal–organic framework [Zn(L)]·2MeOH·H2O (1) was synthesized for the first time by treating a novel 8-hydroxyquinolinate ligand H2L involving two carboxylate groups with zinc salt. Based on single-crystal X-ray analysis, the Zn-MOF exhibits a porous framework assembled from interlinked nanotubes that are constructed from three 43 helices. Complex 1 possesses excellent stability in both water and common organic solvents, which is conducive to its utility as a chemical sensor. The fluorescent sensing studies indicated that 1 can detect Fe3+ in aqueous solution with high sensitivity and selectivity even in the presence of other interfering metal cations. The recyclability and possible mechanism of 1 in the Fe3+ sensing process have been demonstrated. Additionally, fluorescent 1 is capable of sensing Cr2O72− in aqueous solution and nitroaromatic explosives in DMF. High selectivity and sensitivity were observed by fluorescence quenching effects. The above observations suggested that 1 can be considered as a potential fluorescent sensor for detecting Fe3+, Cr2O72− and nitroaromatic explosives.

Graphical abstract: A highly stable 8-hydroxyquinolinate-based metal–organic framework as a selective fluorescence sensor for Fe3+, Cr2O72− and nitroaromatic explosives

Supplementary files

Article information

Article type
Research Article
Submitted
26 Aug 2020
Accepted
21 Sep 2020
First published
22 Sep 2020

Inorg. Chem. Front., 2020,7, 4387-4395

A highly stable 8-hydroxyquinolinate-based metal–organic framework as a selective fluorescence sensor for Fe3+, Cr2O72− and nitroaromatic explosives

Q. Sun, K. Yang, W. Ma, L. Zhang and G. Yuan, Inorg. Chem. Front., 2020, 7, 4387 DOI: 10.1039/D0QI01032D

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