Issue 13, 2021

A fluorescence red-shift and turn-on sensor for acetylacetone derived from ZnII-based metal–organic framework with new topology

Abstract

A three-dimensional metal–organic framework, namely {[Zn3(BIBT)(BTC)5/33-OH)]·solvents}n (JXUST-4), has been synthesized by using ZnII ions, and BIBT and H3BTC ligands (BIBT = 4,7-bi(1H-imidazol-1-yl)benzo-[2,1,3]thiadiazole and H3BTC = 1,3,5-benzenetricarboxylic acid). JXUST-4 shows a new (3,3,7)-connected topology net containing a trinuclear ZnII cluster, uncoordinated N atoms of BIBT and uncoordinated carboxylate O atoms of H3BTC, which facilitates the interaction between the framework and analytes. Fluorescence studies indicate that JXUST-4 generates light yellow luminescence, which could be ascribed to ligand-centered emission. More importantly, JXUST-4 could be viewed as an effective fluorescent sensor toward acetylacetone through an obvious fluorescence red-shift with high sensitivity, efficient selectivity, and outstanding recycling capacity. Furthermore, the possible sensing mechanism of JXUST-4 toward acetylacetone is due to electron transfer and weak interactions between the analyte and framework.

Graphical abstract: A fluorescence red-shift and turn-on sensor for acetylacetone derived from ZnII-based metal–organic framework with new topology

Supplementary files

Article information

Article type
Paper
Submitted
27 Jan 2021
Accepted
20 Feb 2021
First published
22 Feb 2021

CrystEngComm, 2021,23, 2532-2537

A fluorescence red-shift and turn-on sensor for acetylacetone derived from ZnII-based metal–organic framework with new topology

L. Li, S. Yao, X. Tian, T. Zheng, J. Li, S. Liu, J. Chen, M. Yu and H. Wen, CrystEngComm, 2021, 23, 2532 DOI: 10.1039/D1CE00127B

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