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Preparation method of fluorescent reinforced metal nano cluster/zeolite imidazate framework composite nano material and application thereof

A technology of metal nanoclusters and composite nanomaterials is applied in the field of fluorescent materials to achieve the effects of strong universality, low energy consumption and excellent fluorescent performance.

Active Publication Date: 2019-12-31
NORTHWESTERN POLYTECHNICAL UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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 of fluorescent reinforced metal nano cluster/zeolite imidazate framework composite nano material and application thereof
  • Preparation method of fluorescent reinforced metal nano cluster/zeolite imidazate framework composite nano material and application thereof
  • Preparation method of fluorescent reinforced metal nano cluster/zeolite imidazate framework composite nano material and application thereof

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Embodiment 1

[0036] In this embodiment, the preparation method of fluorescence-enhanced metal nanocluster / zeolite imidazolate framework composite nanomaterial is GSH-Au NCs / ZIF-8 composite material, and the preparation process is as follows:

[0037] Preparation of ZIF-8:

[0038] Weigh 888mg of zinc nitrate hexahydrate (Zn(NO) 3 ·6H 2 (2) and 1946.7mg 2-methylimidazole (2-mIM) were dissolved in 60mL of methanol respectively, and the two were mixed in a 250mL round-bottomed flask, and reacted at room temperature 1000rpm for 1h on a magnetic stirrer, and the obtained milk Centrifuge the turbid liquid to obtain a white precipitate, discard the supernatant, wash the white precipitate with methanol three times, and place it in a vacuum oven at 50°C for 12 hours. The dried white powder is ZIF-8;

[0039] Preparation of GSH-Au NCs:

[0040] Take a 10mL round bottom flask with a built-in magnet, add 4.35mL of ultrapure water, stir at room temperature at 500rpm, add 0.15mL of 100mM GSH aqueous ...

Embodiment 2

[0044] In this embodiment, the preparation method of fluorescence-enhanced metal nanocluster / zeolite imidazolate skeleton composite nanomaterial is GSH-Au NCs / ZIF-8 composite material, and its preparation process is the same as that of Example 1, except that ZIF -8 and GSH-AuNCs according to the ratio of Zn:Au=4 were ultrasonicated for 1 h at 30°C to make them assemble, and the GSH-Au NCs / ZIF-8 composite was obtained.

Embodiment 3

[0046] In this embodiment, the preparation method of fluorescence-enhanced metal nanocluster / zeolite imidazolate skeleton composite nanomaterial is GSH-Au NCs / ZIF-8 composite material, and its preparation process is the same as that of Example 1, except that ZIF -8 and GSH-AuNCs according to the ratio of Zn:Au=5 were ultrasonicated at 30°C for 1 h to make them assemble, and the GSH-Au NCs / ZIF-8 composite was obtained.

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Abstract

The invention belongs to the technical field of fluorescent materials and in particular relates to a preparation method of a fluorescent reinforced metal nano cluster / zeolite imidazate framework composite nano material. The preparation method comprises the following steps: enabling a zeolite imidazate framework material and a metal nano cluster liquid to react under conditions ultrasonic waves, stirring or standing, and on the basis of competition coordination / electrostatic interactions of a surface ligand of metal nano clusters with a metal ion / imidazole ligand of the zeolite imidazate framework material, performing reassembling, so as to obtain a metal nano cluster / zeolite imidazate framework composite nano material. The invention is based on an aggregation-induced emission principle anda quantum confinement effect, the light emission performance of the metal nano clusters of the formed metal nano cluster / zeolite imidazate framework composite nano material is greatly improved, and multiple properties of a zeolite imidazate framework can be stilled maintained on the basis. The method is simple in process, mild in reaction condition, low in energy consumption, good in universalityand easy in on-scale popularization and application.

Description

technical field [0001] The invention belongs to the technical field of fluorescent materials, and in particular relates to a preparation method and application of a fluorescence-enhanced metal nanocluster / zeolite imidazolate skeleton composite nanomaterial. Background technique [0002] Metal nanoclusters are generally composed of several to hundreds of metal atoms, and the size is usually around 2nm. They have the characteristics of small size, good water solubility, large Stokes shift, adjustable size fluorescent properties, and low toxicity. It is widely used in sensing detection, biological imaging, cell labeling, catalysis, drug controlled release and other fields. In 2001, Academician Tang Benzhong and his team discovered that molecules with AIE properties (AIEgen) emit weak or even difficult to observe in a dilute solution state, but they can emit bright fluorescence when they aggregate in a solution or in a solid state. This phenomenon is called aggregation-induced ...

Claims

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Application Information

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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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