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A water-soluble luminescent silver nanocluster and its preparation method and application

A silver nano-cluster, water-soluble technology, applied in the field of nano-materials, can solve the problems of cumbersome preparation process, etc., and achieve the effect of simple preparation process, good photobleaching resistance, and environmental friendliness

Active Publication Date: 2022-05-20
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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  • A water-soluble luminescent silver nanocluster and its preparation method and application
  • A water-soluble luminescent silver nanocluster and its preparation method and application
  • A water-soluble luminescent silver nanocluster and its preparation method and application

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Embodiment 1

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

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

Embodiment 2

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

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

Embodiment 3

[0049] The 3,4-dihydroxy-L-phenylalanine aqueous solution of 3 mmol / L in 1 volume and the silver nitrate solution of 1 volume of 1mmol / L were mixed evenly, and the temperature of the mixture was heated to 70 °C for 30 h, and the product was taken out after cooling, centrifuged and purified to obtain water-soluble luminescent silver nanoclusters.

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

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Abstract

The present invention adopts 3,4-dihydroxy-L-phenylalanine as a reducing agent and a ligand protecting agent to prepare a water-soluble luminescent silver nanocluster with good luminescence performance, the preparation process is simple, friendly to the environment, and avoids The commonly used reducing agent sodium borohydride, ascorbic acid and surfactant and other chemical reagents were added, and its fluorescence emission peak was around 460nm. Under ultraviolet light, when observed with a black background, it showed strong blue fluorescence, and the fluorescence quantum yield Up to 3.50%. The preparation method avoids the use of strong alkali NaOH, the reaction is controllable, the particle size distribution is uniform, the average particle size is 1.58nm, it has good photobleaching resistance, and the storage stability at room temperature can reach more than 6 months, and PPi can be processed Directly detected and showed high sensitivity and selectivity.

Description

Technical field [0001] The present invention relates to the field of nanomaterials technology, in particular to a water-soluble luminescent silver nanocluster and its preparation method and application. Background [0002] Pyrophosphate (PPi) is one of the most important bioanions and 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 reactions, hydrolysis of adenosine triphosphate (ATP), and regulation of enzyme activity. PPi is widely used in the food industry as a food additive that not only compounds metal ions and protects vitamin C from damage, but also keeps sausages and canned meat hydrated. PPi is also one of the calcifiation inhibitors of organs such as human muscles and blood vessels, which can inhibit the conversion of amorphous salts into crystalline calcium phosphate, thereby inhibiting the growth of hydroxyapatite crystals, therefore...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/24B22F1/054B22F1/07B82Y40/00B82Y20/00C09K11/58G01N21/64
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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