Cadmium-based metal-organic framework with fluorescence recognition on Al < 3 + > and Ga < 3 + > ions and preparation method thereof

Abstract

The invention provides a cadmium-based metal-organic framework with fluorescence recognition on Al < 3 + > and Ga < 3 + > ions and a preparation method of the cadmium-based metal-organic framework. The molecular formula of a target product is C33H22CdN6O5S. The method comprises the following steps: S1, uniformly mixing cadmium nitrate tetrahydrate, 4, 7-di (1H-benzimidazole-1-yl)-2, 1, 3-benzothiadiazole, 2, 6-naphthalic acid, N, N-dimethylformamide and methyl alcohol; S2, sealing the reaction kettle, heating, carrying out constant-temperature reaction for several hours, and cooling to obtain a yellow-green blocky crystal; and S3, washing the yellow-green blocky crystal with ethanol, and then, performing drying. Based on the strong electron withdrawing capability of the benzothiadiazole group and the strong conjugacy of the 2, 6-naphthalic acid, a new direction is indicated for preparing the luminescent metal-organic framework material, the target product efficiently recognizes aluminum ions and gallium ions through obvious fluorescence red shift, the detection limits are 4.05 mu M and 3.67 mu M respectively, and after five cycles, the fluorescent property is still kept stable, and the cadmium-based metal-organic framework has a potential application value in the fields of chemistry and material science.

Description

technical field [0001] The invention belongs to the field of preparation of functional complex materials, in particular to a 3+ and Ga 3+ Cadmium-based metal-organic frameworks with fluorescent recognition properties for ions and methods for their preparation. Background technique [0002] Due to their structural properties such as high porosity and large specific surface area, as well as their potential applications in environmental protection and human health, metal-organic frameworks (MOFs) have attracted extensive attention from chemical and material science researchers. [0003] As we all know, aluminum is the most abundant metal element in the earth's crust and is widely used in daily life and industry, such as manufacturing industry, ships, cooking utensils, water purification and food packaging. However, excessive aluminum ions in food may lead to brain neurodegeneration and memory loss, thereby further developing Alzheimer's disease and Parkinson's disease. Galli...

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Problems solved by technology

In addition, fluorescence quenching effects are most common in fluorescence recognition, while fluorescence enhancement effects are relatively rare in sensing

At present, there are related reports on probes with fluorescence enhancement effects on aluminum ions and gallium ions, but fluorescent probes that simultaneously recognize two ions through the fluorescence redshift effect are rare.

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