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Preparation method for photoluminescence core-shell nano-copper cluster

A technology of nano-copper clusters and photoluminescence, which is applied in nanotechnology, luminescent materials, chemical instruments and methods, and can solve the problems of no reports on nano-copper clusters

Inactive Publication Date: 2014-05-28
XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although the research on the luminescent properties of copper has been reported, some of the reported nano-copper preparation methods need to be prepared under inert gas protection conditions, or under extremely low solubility conditions, and for those without protective gas, and high concentration Preparation of stable nano-copper clusters has not been reported

Method used

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  • Preparation method for photoluminescence core-shell nano-copper cluster
  • Preparation method for photoluminescence core-shell nano-copper cluster
  • Preparation method for photoluminescence core-shell nano-copper cluster

Examples

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Effect test

Embodiment 1

[0023] a. Add water to thioglycolic acid at a temperature of 20°C to prepare an acidic solution with pH=2.3;

[0024] b. Add the thioglycolic acid acidic solution prepared in step a into 50ml of copper acetate: hexadecyltrimethylammonium bromide = 1:1 in molar ratio respectively, and perform ultrasonic treatment for 5 minutes, at a temperature of 20°C, and disperse Uniformly, a mixed solution is obtained;

[0025] C, drip hydrazine hydrate in the acidic mixed solution that step b obtains, the add-on of hydrazine hydrate is copper acetate in molar ratio: hexadecyltrimethylammonium bromide: hydrazine hydrate=1:1:1, stand 1 Within 2 hours, a photoluminescence core-shell structure nano-copper cluster material containing a core of 5 copper atoms and a shell of a copper-mercaptoacetic acid complex can be obtained.

Embodiment 2

[0027] a. Add water to thioglycolic acid at a temperature of 25°C to prepare an acidic solution with pH=3;

[0028] b. Add the thioglycolic acid acidic solution configured in step a into 50 ml of copper chloride in molar ratio: dodecyltrimethylammonium bromide = 1: 5, and perform ultrasonic treatment for 8 minutes at a temperature of 20°C. Disperse evenly to obtain a mixed solution;

[0029] C, drip hydrazine hydrate in the acidic mixed solution that step b obtains, the add-on of hydrazine hydrate is copper chloride in molar ratio: dodecyltrimethylammonium bromide: hydrazine hydrate=1:5:10, stand still In one hour, a photoluminescence core-shell structure nano-copper cluster material containing a core of 5 copper atoms and a shell of a copper-mercaptoacetic acid complex can be obtained.

Embodiment 3

[0031] a. Add water to thioglycolic acid at a temperature of 30°C to prepare an acidic solution with pH=4;

[0032] b. Add the thioglycolic acid acidic solution prepared in step a into 50ml of copper sulfate: trioctyl ammonium chloride = 1:10 in molar ratio respectively, carry out ultrasonic treatment, ultrasonic time is 10 minutes, temperature is 20°C, disperse evenly, and mix liquid;

[0033] c. Add hydrazine hydrate dropwise to the acidic mixed solution obtained in step b. The amount of hydrazine hydrate is based on the molar ratio of copper sulfate: trioctyl ammonium chloride: hydrazine hydrate = 1:5:15, and leave it for 2 hours. A photoluminescent core-shell structure nano-copper cluster material containing a core of 5 copper atoms and a shell of a copper-mercaptoacetic acid complex is obtained.

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Abstract

The invention discloses a preparation method for a photoluminescence core-shell nano-copper cluster. Aqueous solutions of different PH values are adopted, a metal-mercaptoacetic acid and triethylene tetramine complex is formed, a weak reducing agent is used for hydrazine hydrate reduction or ultrasonic processing reduction, and then the core-shell nano-copper cluster can be obtained. The preparation method is easy to operate and low in cost. The photoluminescence core-shell nano-copper cluster which is obtained according to the method and is made of copper nanometer cluster materials is formed by using nucleus of five copper atoms and a self-assembled multi-layer copper complex structure as a shell, green light with the broadband being 400-600 nm can be emitted out under the ultraviolet illumination of 300-380 nm, the light emitting wave band and the light emitting intensity can be adjusted, and the advantages of good stability, water-solubility, compatibility and the like are provided. The preparation method can be applied to the fields of biological sensors, optical imaging, catalyzing and the like.

Description

Technical field: [0001] The invention relates to a method for preparing a photoluminescent core-shell copper nano cluster. The photoluminescent copper nano cluster material obtained by the method can be used in optical devices, sensing and marking. Background technique: [0002] Metal nanocluster materials are widely used in optics, electronics, and catalysis, especially the precious metals gold and silver, because of their high luminescence performance, long life, and adjustable size. [0003] Metal nanoclusters can be divided into biomedical delivery, electrochemical detection, electronic and optical devices according to their applications. According to its functional structure, various functional groups can be functionalized on its surface, such as amino group, carboxyl group, mercapto group, etc. It has been the pursuit of domestic and foreign scholars to obtain metal clusters with excellent properties (luminescence performance, long life, adjustable size) and low cost....

Claims

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Application Information

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IPC IPC(8): B22F9/24B82Y40/00C09K11/02C09K11/58
Inventor 刘华云王传义陈琳杨苏东
Owner XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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