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Water-soluble luminous silver nanocluster as well as preparation method and application thereof

A silver nanocluster, water-soluble technology, applied in nanotechnology, nanotechnology, nano-optics and other directions, can solve the problems of cumbersome preparation process, and achieve the effect of simple preparation process, good photobleaching resistance, and environmental friendliness

Active Publication Date: 2021-06-08
SHANXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the problems existing in the above-mentioned prior art, the object of the present invention is to provide a water-soluble luminescent silver nanocluster and a preparation method of the silver nanocluster, aiming at overcoming the problems existing in the preparation process of the existing silver nanocluster. The disadvantages of tedious preparation process

Method used

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  • Water-soluble luminous silver nanocluster as well as preparation method and application thereof
  • Water-soluble luminous silver nanocluster as well as preparation method and application thereof
  • Water-soluble luminous silver nanocluster as well as preparation method and application thereof

Examples

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Effect test

Embodiment 1

[0043] Mix 1 volume part of 1mmol / L 3,4-dihydroxy-L-phenylalanine aqueous solution and 1 volume part of 1mmol / L silver nitrate solution evenly, heat the mixture to 50°C and reflux for 42h, after cooling The product was taken out and purified by centrifugation to obtain water-soluble luminescent silver nanoclusters.

[0044] The fluorescence emission peak of the water-soluble luminescent silver nanocluster is around 460nm, and when observed with a black background under ultraviolet light, it presents relatively strong blue fluorescence, and the quantum yield calculated according to formula (I) is 1.10%.

Embodiment 2

[0046] Mix 1 volume part of 2mmol / L 3,4-dihydroxy-L-phenylalanine aqueous solution and 1 volume part of 1mmol / L silver nitrate solution evenly, heat the mixture to 60°C and reflux for 36h, after cooling The product was taken out and purified by centrifugation to obtain water-soluble luminescent silver nanoclusters.

[0047] The fluorescence emission peak of the water-soluble luminescent silver nanocluster is around 460nm, and when observed with a black background under ultraviolet light, it presents relatively strong blue fluorescence, and the quantum yield calculated according to formula (I) is 1.50%.

Embodiment 3

[0049] Mix 1 volume part of 3mmol / L 3,4-dihydroxy-L-phenylalanine aqueous solution and 1 volume part of 1mmol / L silver nitrate solution evenly, heat the mixture to 70°C and reflux for 30h, after cooling The product was taken out and purified by centrifugation to obtain water-soluble luminescent silver nanoclusters.

[0050] The fluorescent emission peak of the water-soluble luminescent silver nanocluster is around 460nm, and when observed with a black background under ultraviolet light, it presents relatively strong blue fluorescence, and the quantum yield is calculated according to formula (I) to be 2.80%.

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Abstract

The invention provides a water-soluble luminous silver nanocluster as well as a preparation method and an application thereof. The water-soluble luminous silver nanocluster with good luminescent property is prepared by adopting 3,4-dihydroxy-L-phenylalanine as a reducing agent and a ligand protective agent, the preparation process is simple and environment-friendly, common reducing agents such as sodium borohydride and ascorbic acid and chemical reagents such as a surfactant are avoided, the fluorescence emission peak is about 460 nm, strong blue fluorescence is presented when observed with a black background under ultraviolet light, and the fluorescence quantum yield can reach 3.50%. According to the preparation method, the use of strong base NaOH is avoided, the reaction is controllable, the particle size distribution is uniform, the average particle size is 1.58 nm, the photobleaching resistance is good, the room-temperature storage stability can reach 6 months or longer, PPi can be directly detected, and the high sensitivity and selectivity are displayed.

Description

technical field [0001] The invention relates to the technical field of nanomaterials, in particular to a water-soluble luminescent silver nanocluster and its preparation method and application. Background technique [0002] Pyrophosphate (PPi), one of the most important biological anions, plays an important role in biological processes such as energy conduction, energy storage, cell metabolism, gene regulation, and signal transduction, such as DNA and RNA polymerization, adenosine triphosphate ( ATP) hydrolysis and regulation of enzyme activity. PPi is widely used in food additives in the food industry. It can not only complex metal ions, protect vitamin C from damage, but also maintain the moisture of sausages and canned meat. PPi is also one of the calcification inhibitors in human muscles and blood vessels, which can inhibit the transformation of amorphous salts into crystalline calcium phosphate, thereby inhibiting the growth of hydroxyapatite crystals. Therefore, it is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24B22F1/00B82Y40/00B82Y20/00C09K11/58G01N21/64
CPCB22F9/24B82Y40/00B82Y20/00C09K11/58G01N21/6428G01N2021/6432B22F1/07B22F1/054
Inventor 张彦吕玫高鹏飞张国梅李天栋双少敏董川
Owner SHANXI UNIV
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