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Preparation method and application for green fluorescent copper nanoclusters

A green fluorescence, copper nanotechnology, applied in nanotechnology, nanotechnology, nano-optics and other directions, can solve the problems of complex pretreatment, poor interference ability and high cost, and achieve the effects of good water solubility, good stability and low cost

Active Publication Date: 2019-08-16
SHANXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Nowadays, the main ways to detect picric acid are gas chromatography, high performance liquid chromatography, etc. These methods require a large amount of organic extractants, are costly, time-consuming, complex pre-treatment and poor interference ability

Method used

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  • Preparation method and application for green fluorescent copper nanoclusters
  • Preparation method and application for green fluorescent copper nanoclusters
  • Preparation method and application for green fluorescent copper nanoclusters

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Example 1: Mix 100 μL 0.1 mol / L copper nitrate solution and 1 mL 0.1 mol / L histidine aqueous solution at room temperature, heat in a 500 W microwave oven for 15 min, and dissolve the reaction product in water to obtain green fluorescent copper Aqueous solution of nanoclusters. The fluorescence emission peak of the fluorescent copper nanoclusters is around 500 nm, and when observed with a black background under an ultraviolet lamp, it exhibits green fluorescence with a quantum yield of 9.5%.

Embodiment 2

[0016] Example 2: Mix 100 μL 0.2 mol / L copper nitrate solution and 0.5 mL 0.2 mol / L histidine aqueous solution at room temperature, heat in a 300 W microwave oven for 20 min, and dissolve the reaction product in water to obtain green fluorescent copper Aqueous solution of nanoclusters. The fluorescence emission peak of the fluorescent copper nanoclusters is around 500 nm, and when observed with a black background under ultraviolet light, it exhibits green fluorescence with a quantum yield of 9.0%.

Embodiment 3

[0017] Example 3: Mix 100 μL 0.05 mol / L copper nitrate solution and 2 mL 0.05 mol / L histidine aqueous solution at room temperature, heat in a 700 W microwave oven for 10 min, and dissolve the reaction product in water to obtain green fluorescent copper Aqueous solution of nanoclusters. The fluorescence emission peak of the fluorescent copper nanoclusters is around 500 nm, and when observed with a black background under ultraviolet light, it presents green fluorescence with a quantum yield of 9.1%.

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Abstract

The invention provides a preparation method and application for fluorescent copper nanoclusters. The preparation method of the fluorescent copper nanoclusters comprises the following steps of uniformly mixing 1 part of a copper nitrate solution with the concentration being 0.05-0.2mol / L and 5-20 parts of a histidine aqueous solution with the concentration being 0.05-0.2mol / L at a room temperatureby volume parts, putting a mixture in a 300-700W microwave oven for heating for 10-20 min, and dissolving a reaction product with water to obtain a green fluorescent copper nanocluster aqueous solution. The preparation process disclosed by the invention is simple and rapid and has the advantages of cheap and available raw materials, excellent fluorescence performance, good biocompatibility and thelike; and the prepared copper nanocluster aqueous solution is good in water solubility and stability and high in fluorescence intensity, is non-toxic and can be applied to detection of pH sensing andpicric acid.

Description

technical field [0001] The invention belongs to the technical field of fluorescent nanometer materials, and in particular relates to a preparation method and application of a green fluorescent copper nanocluster, especially the application in pH sensing and picric acid detection. Background technique [0002] In recent years, with the close connection between chemistry and materials science, electronic information technology and other disciplines and the rapid development of society, economy and politics, nanotechnology has made great progress, and nanomaterials have been widely used in many fields. Therefore, in the past ten years, the research and application of nanomaterials has become one of the most concerned research topics. Metal nanoclusters are a class of nanomaterials that are currently being studied, and are generally composed of a few to a hundred metal atoms. They are a class of nanoparticles with discrete energy levels, and there will be molecular-like electron...

Claims

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Application Information

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IPC IPC(8): B22F9/24B22F1/00B82Y20/00B82Y40/00C09K11/58G01N21/64
CPCB22F9/24C09K11/58B82Y20/00B82Y40/00G01N21/6428G01N2021/6432B22F1/054
Inventor 高鹏飞张彦张国梅李天栋双少敏董川
Owner SHANXI UNIV
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