Two bis-ligand-coordinated Zn(ii)-MOFs for luminescent sensing of ions, antibiotics and pesticides in aqueous solutions.

Zhao-Di Zhou,Bao-Yi Yu,Bin Du,Yuan-Yue Shen,Yin Liu,Chong-Chen Wang,Shi-Qi Li

doi:10.1039/d2ra00376g

Abstract

Two organometallic complexes with two and three-dimensional architectures were constructed by using multiple ligands and Zn(ii) ions: [Zn3(BTC)2(DTP)4(H2O)2]·(H2O)4 (Zn-1) (BTC = benzene-1,3,5-tricarboxylic acid and DTP = 3,5-di(1,2,4-triazol-1-yl)pyridine) and [Zn2(NTD)2(DTP)] (Zn-2) (NTD = 1,4-naphthalenedicarboxylic acid). The as-prepared complexes were characterized by single-crystal X-ray diffraction (SCXRD), elemental analysis, powder X-ray diffraction (PXRD), Fourier transform infrared spectroscopy (FT-IR), thermogravimetric analysis (TGA) and fluorescence analysis. Fluorescence sensing tests revealed that the two complexes are effective, sensitive and selective toward cationic Fe3+ and anionic MnO4− and Cr2O72−. During the antibiotic sensing process, cefixime (CFX) for Zn-1 and nitrofurantoin (NFT) for Zn-2 exhibited the highest quenching efficiencies. For sensing pesticides, the highest quenching efficiencies were exhibited by imidacloprid (IMI) toward Zn-1 and Zn-2. The fluorescence quenching of the complexes that was induced by antibiotics, pesticides and MnO4− was attributed to both the inner filter effect (IFE) and the fluorescence resonance energy transfer (FRET) effect.

Highlights

Accompanying the enormous development of industry, agriculture and pharmaceuticals, environmental pollution, especially water pollution, has emerged as an increasingly severe issue in ecology and human health.[1,2] Among the diverse inorganic pollutants, iron is a necessary element for the human body, and a higher dose uptake of Fe3+ from drinking water or food can cause severe health problems.[3]
Two organometallic complexes with two and three-dimensional architectures were constructed by using multiple ligands and Zn(II) ions: [Zn3(BTC)2(DTP)4(H2O)2]$(H2O)[4] (Zn-1) (BTC 1⁄4 benzene-1,3,5-tricarboxylic acid and DTP 1⁄4 3,5-di(1,2,4-triazol-1-yl)pyridine) and [Zn2(NTD)2(DTP)] (Zn-2) (NTD 1⁄4 1,4naphthalenedicarboxylic acid)
The as-prepared complexes were characterized by single-crystal X-ray diffraction (SCXRD), elemental analysis, powder X-ray diffraction (PXRD), Fourier transform infrared spectroscopy (FT-IR), thermogravimetric analysis (TGA) and fluorescence analysis

Summary

Introduction

Accompanying the enormous development of industry, agriculture and pharmaceuticals, environmental pollution, especially water pollution, has emerged as an increasingly severe issue in ecology and human health.[1,2] Among the diverse inorganic pollutants, iron is a necessary element for the human body, and a higher dose uptake of Fe3+ from drinking water or food can cause severe health problems.[3]. Two bis-ligand-coordinated Zn(II)-MOFs for luminescent sensing of ions, antibiotics and pesticides in aqueous solutions†

Results

Conclusion