Fluorescent copper nano-cluster as well as preparation method and application thereof

A technology of fluorescent copper nanoclusters and copper salts, applied in nanotechnology, nanotechnology, fluorescence/phosphorescence, etc., to achieve the effects of strong photobleaching resistance, simple preparation process and controllable reaction conditions

Active Publication Date: 2020-08-18
SHANXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the research on CuNCs is still in its preliminary stage, and it is still necessary to explore new strategies for the rapid and efficient synthesis of stable and highly fluorescent CuNCs using other protective agents, and to further broaden its application fields.

Method used

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  • Fluorescent copper nano-cluster as well as preparation method and application thereof
  • Fluorescent copper nano-cluster as well as preparation method and application thereof
  • Fluorescent copper nano-cluster as well as preparation method and application thereof

Examples

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Effect test

Embodiment 1

[0034] A method for preparing fluorescent copper nanoclusters, comprising the following steps: 2 parts of 0.01mol L -1 3,4-dihydroxyphenylalanine aqueous solution and 20 parts of 0.1mol L -1Mix the copper nitrate aqueous solution, stir the mixed solution evenly and control the microwave heating power of 53W to heat for 18min, take out the solution after cooling, and purify the obtained solution through centrifugation at 12000rpm for 2min, remove the large-particle copper nanoclusters, and obtain fluorescent copper nanoclusters In aqueous solution, the fluorescent emission peak of the fluorescent copper nanocluster is around 514nm, and the quantum yield is 0.08%.

Embodiment 2

[0036] A method for preparing fluorescent copper nanoclusters, comprising the following steps: adding 4 parts of 0.03mol L -1 3,4-dihydroxyphenylalanine aqueous solution and 16 parts of 0.08mol L -1 Mix the copper chloride aqueous solution, stir the mixed solution evenly and control the microwave heating power of 85W to heat for 15min, take out the solution after cooling, and purify the obtained solution through centrifugation at 6500rpm for 12min, remove the large-particle copper nanoclusters, and obtain fluorescent copper nanoclusters A cluster aqueous solution, the fluorescence emission peak of the fluorescent copper nano cluster is around 514nm, and the quantum yield is 0.11%.

Embodiment 3

[0038] A method for preparing fluorescent copper nanoclusters, comprising the following steps: dissolving 6 parts of 0.05mol L -1 3,4-dihydroxyphenylalanine aqueous solution and 10 parts of 0.05mol L -1 Mix the copper nitrate aqueous solution, stir the mixed solution evenly and control the microwave heating power of 119W to heat for 12min, take out the solution after cooling, and purify the obtained solution through 9000rpm centrifugation for 10min, remove the large-particle copper nanoclusters, and obtain fluorescent copper nanoclusters In aqueous solution, the fluorescent emission peak of the fluorescent copper nanocluster is around 514nm, and the quantum yield is 0.58%.

[0039] Add 100 μL fluorescent copper nanocluster aqueous solution into the ultraviolet cuvette and fluorescent cuvette, and measure its ultraviolet-visible absorption spectrum and fluorescence excitation and emission spectra. Such as figure 2 The fluorescent copper nanoclusters showed maximum excitation...

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Abstract

The invention provides a fluorescent copper nano-cluster as well as a preparation method and application thereof. The preparation method comprises the following steps: mixing 2-20 parts by volume of a3, 4-dihydroxyphenylalanine aqueous solution of 0.01-0.1 mol.L <-1 > and 2-20 parts by volume of a copper salt aqueous solution of 0.01-0.1 mol.L <-1 >, uniformly stirring the mixed solution, and carrying out microwave heating to obtain a fluorescent copper nano-cluster solution. The invention has the advantages of simple preparation process, low instrument requirements, controllable reaction conditions, short treatment time, low cost and the like; addition of reducing agents such as hydrazine hydrate and ascorbic acid is avoided; the prepared copper nano-cluster has the advantages of small size, good water solubility, strong photobleaching resistance and the like; the copper nanocluster prepared by the method can generate fluorescence, the fluorescence emission peak of the copper nanocluster is about 514nm, the quantum yield of the fluorescent copper nanocluster can be up to 0.58%, and the prepared copper nanocluster has high sensitivity and selectivity to body iron ions and can be used for constructing an iron ion sensing system.

Description

technical field [0001] The invention belongs to the technical field of fluorescent nanometer materials, and in particular relates to a fluorescent copper nanocluster and its preparation method and application. Background technique [0002] Metal nanoclusters (NCs), usually composed of several to tens of atoms, whose properties are controlled by their subnanometer size, serve as fluorescent materials with good biocompatibility, large Stokes shift and easy functionalization etc. advantages. Therefore, it has attracted the attention of many researchers, making it successfully applied in the fields of biosensing, catalysis and imaging. Common metal nanoclusters mainly include gold, silver, platinum, copper and other metal nanoclusters and alloy nanoclusters containing two or more metal elements. The cost of synthesizing gold, silver, and platinum noble metal nanoclusters is high and the procedures are complicated. However, copper is cheap and belongs to the same main group as ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/58C09K11/02G01N21/64B82Y30/00
CPCC09K11/58C09K11/025G01N21/6402G01N21/6428B82Y30/00G01N2021/6439
Inventor 张彦张雨婷冯丽高鹏飞李天栋张国梅董川双少敏
Owner SHANXI UNIV
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