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Zif-8-coated gold nanocluster material and its preparation method and application

A ZIF-8, gold nanocluster technology, applied in nanotechnology, luminescent materials, analytical materials, etc. for materials and surface science, to achieve the effect of good fluorescence performance, long fluorescence lifetime, and low detection limit

Active Publication Date: 2022-06-03
GUANGXI TEACHERS EDUCATION UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Vitamin C can be produced by metabolism in most organisms, but there are many exceptions, such as humans, the lack of vitamin C can cause scurvy

Method used

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  • Zif-8-coated gold nanocluster material and its preparation method and application
  • Zif-8-coated gold nanocluster material and its preparation method and application
  • Zif-8-coated gold nanocluster material and its preparation method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0027] A preparation method of a ZIF-8 coated gold nano-cluster, comprising the following steps:

[0028] S1. Completely dissolve dimethylimidazole in ultrapure water, add zinc nitrate hexahydrate solution during stirring, and obtain ZIF-8 mixed solution after stirring for 24h. The ratio of the mixed solution and methanol is 1:1 by volume. Centrifuge, collect the precipitate; Disperse the collected precipitate in ultrapure water for subsequent use, wherein the molar ratio of dimethylimidazole and zinc nitrate hexahydrate is 65:1;

[0029] S2. Dissolve 11-mercaptoundecanoic acid in an aqueous solution of ZIF-8, add dimethylimidazole, glutathione, chloroauric acid, and sodium hydroxide, and stir for 11 hours in the dark, then add absolute ethanol, The precipitate was collected by centrifugation to obtain AuNCs@ZIF-8; wherein, dimethylimidazole, 11-mercaptoundecanoic acid, glutathione, HAuCl 4 The molar ratio is 99:3:3:3:1.

Embodiment 2

[0031] A preparation method of a ZIF-8 coated gold nano-cluster, comprising the following steps:

[0032] S1. Completely dissolve dimethylimidazole in ultrapure water, add zinc nitrate hexahydrate solution during stirring, and obtain ZIF-8 mixed solution after stirring for 24h. The ratio of the mixed solution and methanol is 1:1 by volume. Centrifuge, collect the precipitate; Disperse the collected precipitate in ultrapure water for subsequent use, wherein the molar ratio of dimethylimidazole and hexahydrate zinc nitrate is 85:1;

[0033] S2. Dissolve 11-mercaptoundecanoic acid in an aqueous solution of ZIF-8, add dimethylimidazole, glutathione, chloroauric acid, and sodium hydroxide, and stir for 11 hours in the dark, then add absolute ethanol, The precipitate was collected by centrifugation to obtain AuNCs@ZIF-8; wherein, dimethylimidazole, 11-mercaptoundecanoic acid, glutathione, HAuCl 4 The molar ratio is 101:5:5:5:1.

Embodiment 3

[0035] A preparation method of a ZIF-8 coated gold nano-cluster, comprising the following steps:

[0036] S1. Completely dissolve dimethylimidazole in ultrapure water, add zinc nitrate hexahydrate solution during stirring, and obtain ZIF-8 mixed solution after stirring for 24h. The ratio of the mixed solution and methanol is 1:1 by volume. Centrifuge to collect the precipitate; disperse the collected precipitate in ultrapure water for later use, wherein the molar ratio of dimethylimidazole and zinc nitrate hexahydrate is 70:1;

[0037] S2. Dissolve 11-mercaptoundecanoic acid in an aqueous solution of ZIF-8, add dimethylimidazole, glutathione, chloroauric acid, and sodium hydroxide, and stir for 11 hours in the dark, then add absolute ethanol, The precipitate was collected by centrifugation to obtain AuNCs@ZIF-8; wherein, dimethylimidazole, 11-mercaptoundecanoic acid, glutathione, HAuCl 4 The molar ratio is 100:4:4:4:1.

[0038] Application in the detection of vitamin C cont...

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Abstract

The invention discloses a ZIF-8-coated gold nanocluster material, specifically: a metal-organic framework ZIF-8 is used as an outer frame, AuNCs are coated inside the outer frame, and the ZIF-8-coated gold nanocluster material , the ratio of Au / Zn is 0.01063112; the synthesis condition of the gold nanocluster material coated with ZIF-8 of the present invention is mild, and the gold nanocluster material coated with ZIF-8 obtained can be used to detect the content of vitamin C, and the detection of vitamin C The limit reaches 0.05‑5μmol / L; compared with the existing detection methods of fluorescent probes, the fluorescence performance is good, the fluorescence lifetime is long, the service life is longer, and the practicability is good.

Description

technical field [0001] The present invention relates to the field of gold nano-cluster materials. More specifically, the present invention relates to a ZIF-8 coated gold nanocluster material and its preparation method and application. Background technique [0002] Vitamin C (Vitamin C / ascorbic acid, also known as L-ascorbic acid, also translated as vitamin C) is an essential nutrient for higher primates and a few other organisms. It is a vitamin that exists in food and can be used as a nutritional supplement. Vitamin C can be produced by metabolism in most organisms, but there are many exceptions, such as humans, where vitamin C deficiency can cause scurvy. [0003] Therefore, an efficient and rapid method for detecting vitamin C in tablets is established, which is beneficial to the quality monitoring of vitamin C health products. [0004] In the prior art, the detection methods for vitamin C mainly include: iodometric method, titration analysis method, high performance l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/02C09K11/06C09K11/58B82Y30/00B82Y40/00G01N21/64
CPCC09K11/025C09K11/06C09K11/58B82Y30/00B82Y40/00G01N21/643G01N2021/6432Y02A50/30
Inventor 周志强廖远萍杨立云杨美金刘义
Owner GUANGXI TEACHERS EDUCATION UNIV
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