Method for synthesizing fluorogold nanometer quantum dots by taking micromolecules as stabilizer

A fluorescent gold nanometer and quantum dot technology, which is applied in the chemical industry, can solve the problems of complex preparation process and long synthesis cycle, and achieve the effect of short synthesis cycle, small particle size and convenient large-scale synthesis

Inactive Publication Date: 2013-01-09
HUNAN UNIV OF SCI & TECH
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Problems solved by technology

[0003] At present, most of the preparations of gold nanoclusters are stabilized by polymers, dendrimers and biomacromolecules, and the preparation process is relatively complicated.
Synthesis methods using small molecules as stabilizers are relatively rare, and the synthesis cycle is relatively long

Method used

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  • Method for synthesizing fluorogold nanometer quantum dots by taking micromolecules as stabilizer
  • Method for synthesizing fluorogold nanometer quantum dots by taking micromolecules as stabilizer

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Embodiment 1

[0020] 1. Trisodium citrate as stable SnCl 2 Solution preparation

[0021] To 17mmol L -1 Trisodium citrate solution (passed for 30min N 2 Deoxygenation) is added into stannous chloride, and after it is completely dissolved, the nitrogen gas is stopped, and it is made into c SnCl2 =12mmolL -1 of stannous chloride solution. Trisodium citrate as a stabilizer to prevent SnCl 2 hydrolysis.

[0022] 2. Preparation process of gold nanoclusters

[0023] Take 30.0mL 12mmol L -1 SnCl 2 solution, 30.0 mL 0.005% HAuCl 4 solution, 315 μL 3% H 2 o 2 solution and 560μL 1.0mol L -1 H 3 PO 4 Fluorescent gold nanoparticles (F-AuNPs) were synthesized by the hydrothermal method and reacted at 150°C for 2 hours. At this time, the fluorescence intensity reached the maximum, indicating that the reaction was complete. The synthesized F-AuNPs solution was refrigerated for future use.

[0024] 3. Fluorescent properties of gold nanoclusters

[0025] Fluorescence and ultraviolet spectra...

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Abstract

The invention discloses a method for synthesizing fluorogold nanometer quantum dots by taking micromolecules as a stabilizer. The method is characterized by comprising the following steps: (1) preparing a SnCl2 solution which utilizes trisodium citrate as the stabilizer; and (2) synthesizing fluorogold nanometer quantum dots by taking the SnCl2 solution, an HAuCl4 solution, an H202 solution and an H3PO4 solution as raw materials and adopting a hydrothermal method. The method can be used for facilitating large-scale synthesis by adopting conventional micromolecules as the stabilizer; the synthesis period is short and only lasts for two hours, the particle size is small, and strong fluorescence can be produced.

Description

technical field [0001] The invention belongs to the field of chemical industry, in particular to a method for rapidly synthesizing fluorescent gold nanometer quantum dots by using small molecules as stabilizers. Background technique [0002] In recent years, the fluorescent properties of small-sized gold nanoparticles (AuNPs) have attracted the interest of scientists. Because of its superior fluorescence properties, this kind of fluorescent AuNPs (F-AuNPs) is also called gold nanometer quantum dots or gold nanoclusters. It has been reported that F-AuNPs were synthesized under different conditions, and these F-AuNPs can emit stronger fluorescence signals than many monolayer-protected gold nanoclusters. For example, F-AuNPs synthesized with polyamidoamine (PAMAM) dendrimers or polyethylenimine (PEI) as stabilizers have strong fluorescence signals and high quantum yields. It is of great significance to explore simple methods to synthesize F-AuNPs. [0003] At present, most o...

Claims

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Application Information

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IPC IPC(8): B22F9/24B82Y40/00C09K11/58
Inventor 龙云飞张萍萍陈述
Owner HUNAN UNIV OF SCI & TECH
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