A zinc-based metal-organic framework with selective fluorescence recognition for acetylacetone and its preparation method

Abstract

The invention relates to a zinc-based metal organic framework with a selective fluorescent recognition function on acetylacetone and a preparation method thereof. A chemical formula is C80H48N8O12Zn3;a crystal is crystallized in a monoclinic system; lattice parameters are as follows: a is equal to 18.96 angstroms, b is equal to 11.21 angstroms, c is equal to 36.62 angstroms, alpha is equal to 90degrees, beta is equal to 100.91 degrees and gamma is equal to 90 degrees. The invention further provides the preparation method of the zinc-based metal organic framework; the preparation method comprises the following steps: adding zinc nitrate hexahydrate, 1,3-bis(benzimidazole-1-yl)benzene, 1,4-naphthalic acid, N,N-dimethylformamide and ethanol into a small glass bottle; carrying out ultrasonictreatment to uniformly mix the materials; raising the temperature of a mixture and reacting for 65 to 80 h; cooling to obtain a colorless block-shaped crystal; collecting the crystal and washing withethanol; after drying in the air, obtaining the zinc-based metal organic framework. According to the preparation method provided by the invention, a new direction is provided for preparation of a light-emitting metal organic framework material based on a relatively strong coordination capability of divalent zinc ions and cooperative coordination of two organic ligands; the zinc-based metal organic framework can be used as a fluorescent material for recognizing small molecular organic matters and has potential application value in the fields of chemistry and materialogy.

Description

technical field [0001] The invention relates to a method for preparing a zinc-based metal-organic framework with selective fluorescence recognition for acetylacetone, and belongs to the field of preparation of functional complex materials. Background technique [0002] Fluorescence recognition is a new type of detection and recognition technology based on fluorescent solid-state materials. Compared with traditional detection and recognition technologies such as Raman spectroscopy and ion mobility spectrometry (IMS), it has good selectivity, high sensitivity, and less time-consuming. With the advantages of low cost and easy operation, it may replace traditional methods and become a fluorescence recognition technology with great development potential. As the core part of fluorescence recognition technology, the characteristics of fluorescent solid-state materials directly affect the performance of fluorescence recognition sensitivity and efficiency, so the research of fluoresc...

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Problems solved by technology

There are only three cases of acetylacetone-sensing fluorescent probes reported in the literature, see J.-Y.Zou, L.Li, S.-Y.You, K.-H.Chen, X.-N.Dong, Y. .-H.Chen and J.-Z.Cui,Cryst.Crowth Des.,2018,18,3997; X.-M.Kang,R.-R.Cheng,H.Xu,W.-M.Wang and B. Zhao, Chem. Eur. J., 2017, 23, 13289; H. Yang, F. Wang, Y.-X. Tan, Y. Kang, T.-H. Li and J. Zhang, Chem. Asian J.,2012,7,1069, however, these probes are all based on the fluorescence quenching effect, and no fluorescent probes with fluorescence enhancement effects have been reported

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