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Controllable Synthesis of Metal–Organic Frameworks Based on Anthracene Ligands for High-Sensitivity Fluorescence Sensing of Fe3+, Cr2O72–, and TNP

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posted on 2022-04-11, 21:45 authored by Jiao Li, Jingfang Tian, Haihuan Yu, Mingyue Fan, Xiao Li, Fangbin Liu, Jing Sun, Zhongmin Su
The effective detection of Fe3+, Cr2O72–, and picric acid (TNP) is of immense significance in chemical and environmental fields. In this paper, five novel luminescent Cd­(II)-metal–organic frameworks (MOFs) (CUST-601–605) based on the ligand of 1-(9-(1H-1,2,4-triazol-1-yl)­anthracen-10-yl)-1H-1,2,4-triazole (tatrz) and a series of carboxylate ligands were synthesized via solvothermal reactions. CUST-601–605 are characterized by X-ray single-crystal diffraction, powder X-ray diffraction, and thermogravimetric analysis. CUST-601 and 605 show porous three-dimensional (3D) structures, and CUST-602 shows 2D network structures, with the ethanol molecules as the capping agents. CUST-603 and CUST-604 exhibit 3D and 2D structures, respectively, based on the controlled contents of organic ligands and capping agents. Luminescent experiments indicate that CUST-601, 602, and 604 show satisfactory sensitivity and selectivity for the detection of Fe3+, Cr2O72–, and TNP. Further, CUST-603 and 605 are only used to determine Cr2O72– and TNP sensitively. The MOF-based fluorescent sensors designed in this paper demonstrate the successful and feasible strategy to use anthracene-based ligands, which shows great potential in environmental detection applications.

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