A preparation method of porous metal-organic framework with fluorescence recognition function for small organic molecules

Abstract

The invention discloses a method for preparing a porous metal-organic framework with a fluorescent recognition function for small organic molecules, comprising the following steps: (1) synthesizing an organic ligand 5-(4-pyridin-4-yl-benzamido) ‑isophthalic acid (H2PYBI); (2) Synthesis of Zn‑MOF material: after weighing Zn(NO3)2 6H2O and H2PYBI and dissolving them in a solvent, heat the reaction in a reactor, and cool down to room temperature after the reaction, to obtain Zn-MOF material; (3) preparing an activated complex: heating the Zn-MOF material in step (2) to remove guest molecules to obtain an activated complex. Compared with the prior art, the porous metal-organic framework with fluorescence recognition function for small organic molecules of the present invention has structural characteristics such as high porosity, large specific surface area, regular pores, and adjustable skeleton size, and is thermally and chemically stable. Well, it can be directly prepared as a device to detect nitrobenzene.

Description

technical field [0001] The invention relates to the application field of metal organic framework materials, in particular to a method for preparing a porous metal organic framework with a fluorescent recognition function for small organic molecules. Background technique [0002] Metal-organic framework complexes (Metal-Organic Frameworks) are crystalline materials with a periodic network structure formed through the self-assembly process of metal ions and organic ligands. This material is a branch of the introduction of the concept of crystal engineering into the design of supramolecular architecture. Metal-organic framework materials are the product of the combination of structural chemistry, material chemistry, organic chemistry and crystal engineering. In recent years, they have been continuously extended to the fields of biochemistry, medicinal chemistry and green chemistry. As a new research field, metal-organic framework materials have only been studied for decades, b...

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Problems solved by technology

Interestingly, benzene, toluene, chlorobenzene, phenol, o-cresol and p-bromophenol 2 (1,4-BDC) 3 (H 2 O) 2 (H 2 O) 2 There is basically no effect on the fluorescence intensity; while some nitroaromatic compounds, such as nitrobenzene, 2,4-dinitrotoluene and 2,4,6-trinitrotoluene, have a significant decrease in the fluorescence intensity

However, several nitroaromatic compounds have little effect on the fluorescence intensity of Eu(BTC), and do not have specific recognition

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