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Preparation method and application of fluorescent copper cluster with stable silane

A fluorescent copper and cluster technology, which is applied in the field of fluorescence detection, can solve the problems of loss of photoluminescence and few research reports on the synthesis of copper clusters.

Inactive Publication Date: 2016-08-31
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

However, the synthesis of copper clusters has always been a challenge, because copper clusters with extremely small sizes have a strong tendency to aggregate and high surface activity, and are easy to agglomerate into larger particles or be oxidized, losing their photoluminescent properties.
Therefore, there are relatively few reports on the synthesis of copper clusters.

Method used

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  • Preparation method and application of fluorescent copper cluster with stable silane
  • Preparation method and application of fluorescent copper cluster with stable silane
  • Preparation method and application of fluorescent copper cluster with stable silane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] a. Add 120 μL of 2-mercaptopropyltrimethoxysilane with a mass concentration of 95% to 6 mL of 0.005 mol / L copper acetate tetrahydrofuran solution, and stir at room temperature for 3 hours to obtain a nearly colorless solution;

[0019] b. Under stirring, quickly add 200 μL of 1.591 mol / L sodium cyanoborohydride tetrahydrofuran solution to the solution in step a. After the addition is complete, continue stirring for 48 hours to obtain a light yellow mixed solution;

[0020] c. Centrifuge the mixed solution obtained in step b at 8000 rpm for 5 minutes, wash the obtained precipitate with absolute ethanol, and cycle this procedure twice to obtain a copper cluster precipitate;

[0021] d. Mix the copper cluster precipitate obtained in step c with tetrahydrofuran and disperse it with ultrasonic for 5 minutes to obtain a uniformly dispersed fluorescent copper cluster system.

Embodiment 2

[0023] a. Add 120 μL of 2-mercaptopropyltrimethoxysilane with a mass concentration of 95% to 6 mL of 0.005 mol / L copper acetate tetrahydrofuran solution, and stir at room temperature for 3 hours to obtain a nearly colorless solution;

[0024] b. Under stirring, quickly add 250 μL of 1.591 mol / L sodium cyanoborohydride tetrahydrofuran solution to the solution in step a. After the addition is complete, continue stirring for 48 hours to obtain a light yellow mixed solution;

[0025] c. Centrifuge the mixed solution obtained in step b at 8000rpm for 5 minutes, wash the obtained precipitate with absolute ethanol, and cycle this procedure twice to obtain the copper cluster precipitate;

[0026] d. Mix the copper cluster precipitate obtained in step c with anhydrous methanol and ultrasonically disperse it for 5 minutes to obtain a uniformly dispersed fluorescent copper cluster system.

Embodiment 3

[0028] a. Add 120 μL of 2-mercaptopropyltrimethoxysilane with a mass concentration of 95% to 6 mL of 0.005 mol / L copper acetate tetrahydrofuran solution, and stir at room temperature for 3 hours to obtain a nearly colorless solution;

[0029] b. Under stirring, quickly add 300 μL of 1.591 mol / L sodium cyanoborohydride tetrahydrofuran solution to the solution in step a. After the addition is complete, continue stirring for 48 hours to obtain a light yellow mixed solution;

[0030] c. Centrifuge the mixed solution obtained in step b at 8000rpm for 5 minutes, wash the obtained precipitate with absolute ethanol, and cycle this procedure twice to obtain the copper cluster precipitate;

[0031] d. Mix the copper cluster precipitate obtained in step c with absolute ethanol and disperse it with ultrasonic for 5 minutes to obtain a uniformly dispersed fluorescent copper cluster system.

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Abstract

The invention relates to a preparation method and application of a fluorescent copper cluster with stable silane. According to the method, a silane coupling agent frequently used in the industry is adopted, 2-mercaptopropyl trimethoxy silane is used as a stabilizer, and through the high substantivity of a mercapto functional group of the 2-mercaptopropyl trimethoxy silane with copper, and the moderate reducing capacity of sodium cyanoborohydride, copper salt is reduced to generate a silane blocking fluorescent copper cluster. The method has the characteristics of being easy to implement, free of shielding of extra surface active agents or inert gas, and low in cost. The copper cluster obtained through the method is composed of 4-9 copper atoms, and can emit two-peak fluorescent light with the peaks at wavelength positions of 410 nm and 580 nm when triggered by ultraviolet light with the wavelength being 375 nm. Through research, the fluorescent copper cluster can be applied to low concentration hydrogen peroxide detection and has certain practical application value.

Description

technical field [0001] The invention relates to a preparation method and application of a silane-stabilized fluorescent copper cluster. The copper cluster material obtained by the method has good photoluminescence performance and can be applied to fluorescence detection. Background technique [0002] Metal clusters are substances composed of several to hundreds of metal atoms, which not only have some properties similar to molecules, but also have many characteristics unique to nanomaterials. Because of this unique characteristic, metal clusters have attracted extensive attention of researchers in recent years. Fluorescent metal clusters are one of the most concerned clusters, which are characterized by extremely small size (generally <2nm) and excellent photoluminescence properties, and have great potential in bioimaging labeling, fluorescent sensing and detection, etc. Good application potential. [0003] In the study of fluorescent metal clusters, luminescent gold cl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24C09K11/58G01N21/64B82Y40/00B82Y20/00
CPCB22F9/24B82Y20/00B82Y40/00C09K11/58G01N21/643
Inventor 王传义周劭臣王富
Owner XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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