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Preparation method and application of fluorescence-enhanced metal nanocluster/zeolite imidazolate framework composite nanomaterial

A technology of metal nanoclusters and composite nanomaterials is applied in the field of fluorescent materials to achieve the effects of simple process, low energy consumption and mild reaction conditions

Active Publication Date: 2022-03-22
NORTHWESTERN POLYTECHNICAL UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, there have been many reports on metal nanoparticles coated in ZIFs. The principle is to use the characteristics of ZIFs porosity and large specific surface area to enhance the catalytic performance of metal nanoparticles, but it is rare to see the use of ZIFs to enhance ultra-small metal nanoparticles. Report on Fluorescent Properties of Clusters

Method used

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  • Preparation method and application of fluorescence-enhanced metal nanocluster/zeolite imidazolate framework composite nanomaterial
  • Preparation method and application of fluorescence-enhanced metal nanocluster/zeolite imidazolate framework composite nanomaterial
  • Preparation method and application of fluorescence-enhanced metal nanocluster/zeolite imidazolate framework composite nanomaterial

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The preparation method of the fluorescent reinforced metal nanoclusters / zeolite imidazole skeleton composite nanomaterials is prepared, and the preparation process of the preparation process is as follows:

[0037] Preparation of ZIF-8:

[0038] 888 mg of hexahydrate zinc (Zn (NO) 3 · 6h 2 O) and 1946.7 mg 2-methylimidazole (2-MIM) were dissolved in 60 mL of methanol, and both were mixed in 250 ml round bottom flasks, and at room temperature at room temperature at room temperature for 1 h, the obtained milk The turbid fluid has a white precipitate, poured off the supernatant, and the white precipitate was applied with methanol washed three times in a vacuum oven in a vacuum oven, and the dry white powder was ZIF-8;

[0039] Preparation of GSH-AU NCS:

[0040] 10 ml of the round bottom flask, the built-in magnet was added, and 4.35 ml of ultra-pure water was added, and the mixture was stirred at room temperature, a GSH aqueous solution of 100 mM was added. After stirring f...

Embodiment 2

[0044] The preparation method of the fluorescence reinforced metal nanoclusters / zeolite imidazole skeleton composite nanomaterial is the prepared GSH-Au NCS / ZIF-8 composite, and the preparation process is the same as in Example 1, and the zif is -8 and GSH-AUNCs are ultrasonic at 30 ° C for 1 h at Zn: Au = 4, allowing it to obtain GSH-Au NCS / ZIF-8 composite.

Embodiment 3

[0046] The preparation method of the fluorescence reinforced metal nanoclusters / zeolite imidazole skeleton composite nanomaterial is the prepared GSH-Au NCS / ZIF-8 composite, and the preparation process is the same as in Example 1, and the zif is -8 and GSH-AUNCs are at 30 ° C for 1 h at Zn: Au = 5, allowing it to assemble to obtain GSH-Au NCS / ZIF-8 composite.

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Abstract

The invention belongs to the technical field of fluorescent materials, and in particular relates to a method for preparing a fluorescence-enhanced metal nanocluster / zeolite imidazolate framework composite nanomaterial. The zeolite imidazolate framework material and the metal nanocluster liquid are subjected to ultrasonication, stirring or static conditions. Under the following reaction, based on the surface ligands of metal nanoclusters and the metal ions / imidazole ligands in the zeolite imidazolate framework material, competitive coordination / electrostatic interaction occurs, and metal nanoclusters / zeolite imidazolate framework composite nanostructures are reassembled. Material. Based on the principle of aggregation-induced luminescence and quantum confinement effect, the metal nanocluster / zeolite imidazolate framework composite material formed by the present invention greatly enhances the luminescent performance of metal nanoclusters, and on this basis, many properties of the zeolite imidazolate framework are still retained. nature. The method has the advantages of simple process, mild reaction conditions, low energy consumption, strong universality, and easy large-scale popularization and application.

Description

Technical field [0001] The present invention belongs to the technical field of fluorescent materials, and therefore, it is specifically related to the preparation method of fluorescent reinforced metal nanoclusters / zeolite imidazole skeleton composite nanomaterials. Background technique [0002] Metal nanocuscriminals are generally constructed from several to several hundred metal atoms, and the size is usually about 2 nm. It has the characteristics of small size, good water soluble, large-scale, and low toxicity, and low toxicity. It is widely used in sensory detection, biomara, cell markers, catalysis, drug controlled release and other fields. In 2001, the Academician of Tangbenzhong and its team found a molecule with AIE properties (AIEGEN), which was weak and even difficult to observe in the state of the thin solution, but when they were gathered in the solution or in the solid state, bright fluorescence, This phenomenon is referred to as aggregation-Induced Emission (AIE)....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G83/00C09K11/06C09K11/58B82Y30/00G01N21/64
CPCC08G83/008C09K11/06C09K11/58B82Y30/00G01N21/6486G01N21/6428C09K2211/188
Inventor 谭丽丽李强尚利
Owner NORTHWESTERN POLYTECHNICAL UNIV
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