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Method for synthesizing blue fluorescent copper nanocluster by utilizing 6-mercapto-beta cyclodextrin

A blue fluorescence, beta cyclodextrin technology, applied in the field of blue fluorescent copper nanoclusters, can solve the problems of low quantum yield, long time, difficult copper nanoclusters, etc., and achieve the effect of a simple synthesis method

Inactive Publication Date: 2019-08-02
YUNNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] (1) Due to the active nature of copper, it is difficult to synthesize stable and fluorescent copper nanoclusters; the current synthesis steps of copper nanoclusters are relatively cumbersome and the conditions are harsh, and there are many shortcomings in the preparation process, such as time-consuming , low solubility, high energy consumption, low quantum yield, etc.; due to the relatively active nature of copper, even through a complex synthesis process, the prepared product has poor oxidation resistance and unstable fluorescence properties
[0006] (2) The properties of the stabilizer coated on the surface of metal nanoclusters also play an important role in the fluorescence properties of metal nanoclusters. Currently, commonly used stabilizers include oligonucleotides, polypeptides, proteins, and thiols. etc. These substances are often not selective, which limits their application

Method used

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  • Method for synthesizing blue fluorescent copper nanocluster by utilizing 6-mercapto-beta cyclodextrin
  • Method for synthesizing blue fluorescent copper nanocluster by utilizing 6-mercapto-beta cyclodextrin
  • Method for synthesizing blue fluorescent copper nanocluster by utilizing 6-mercapto-beta cyclodextrin

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Experimental program
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Effect test

Embodiment 1

[0026] Embodiment 1: A kind of method utilizing 6-mercapto-beta cyclodextrin to synthesize blue fluorescent copper nano-clusters, the specific steps are as follows:

[0027] (1) At room temperature, mono(6-mercapto-6-deoxy)-β-cyclodextrin was added to copper sulfate and reacted at a stirring rate of 600rmp until the solution was colorless to obtain solution A; wherein copper sulfate The molar ratio to mono(6-mercapto-6-deoxy)-β-cyclodextrin is 1:10;

[0028] (2) Add sodium hydroxide solution in the solution A of step (1) to obtain reaction system and react to colorless to obtain solution B under agitation rate of 600rmp; Wherein the concentration of sodium hydroxide solution in the reaction system is 0.2mol / L ;

[0029] (3) Place the solution B in step (2) at a temperature of 85°C for 120 minutes to obtain a dark brown solution, that is, to obtain a blue fluorescent copper nanocluster CuNCs@6-SH-CD;

[0030] The fluorescence excitation emission spectrum of copper nanocluster...

Embodiment 2

[0035] Embodiment 2: A kind of method utilizing 6-mercapto-beta cyclodextrin to synthesize blue fluorescent copper nano-clusters, the specific steps are as follows:

[0036] (1) At room temperature, mono(6-mercapto-6-deoxy)-β-cyclodextrin was added to copper sulfate and reacted at a stirring rate of 580rmp until the solution was colorless to obtain solution A; wherein copper sulfate The molar ratio to mono(6-mercapto-6-deoxy)-β-cyclodextrin is 1:11;

[0037] (2) Add sodium hydroxide solution in the solution A of step (1) to obtain reaction system and react to colorless to obtain solution B under stirring speed at 580rmp; Wherein the concentration of sodium hydroxide solution in the reaction system is 0.2mol / L ;

[0038] (3) Put the solution B in step (2) at a temperature of 55°C for 270 minutes to obtain a dark brown solution, that is, to obtain a blue fluorescent copper nanocluster CuNCs@6-SH-CD;

[0039] The fluorescence excitation emission spectrum of copper nanoclusters ...

Embodiment 3

[0049] Embodiment 3: A kind of method utilizing 6-mercapto-beta cyclodextrin to synthesize blue fluorescent copper nano-clusters, the specific steps are as follows:

[0050] (1) At room temperature, mono(6-mercapto-6-deoxy)-β-cyclodextrin was added to copper sulfate and reacted at a stirring rate of 550rmp until the solution was colorless to obtain solution A; wherein copper sulfate The molar ratio to mono(6-mercapto-6-deoxy)-β-cyclodextrin is 1:12;

[0051] (2) Add sodium hydroxide solution in the solution A of step (1) to obtain reaction system and react to colorless to obtain solution B under agitation rate of 600rmp; Wherein the concentration of sodium hydroxide solution in the reaction system is 0.2mol / L ;

[0052] (3) Put the solution B in step (2) at a temperature of 75° C. to react for 140 minutes to obtain a dark brown solution, that is, to obtain blue fluorescent copper nanoclusters CuNCs@6-SH-CD;

[0053] The fluorescence excitation emission spectrum of copper nan...

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Abstract

The invention discloses a method for synthesizing a blue fluorescent copper nanocluster by utilizing 6-mercapto-beta cyclodextrin, and belongs to the technical field of fluorescent copper nanoclusters. The method provided by the invention comprises the following steps: adding mono(6-mercapto-6-deoxy)-beta-cyclodextrin into copper sulfate under room temperature conditions, and reacting at a stirring rate of 500-600 rmp until the solution is colorless to obtain a solution A; adding a sodium hydroxide solution into the solution A to obtain a reaction system, and reacting at a stirring rate of 500-600 rmp until the reaction system is colorless to obtain a solution B; and placing the solution B at 55-85 DEGC and reacting for 60-270 min to obtain a dark brown solution, thereby obtaining the bluefluorescent copper nanocluster CuNCs@6-SH-CD. According to the method provided by the invention, the copper nanocluster is synthesized by utilizing mercapto-beta cyclodextrin as a reducing agent anda coating agent; and the synthesis method is simple.

Description

technical field [0001] The invention relates to a method for synthesizing blue fluorescent copper nanoclusters by using 6-mercapto-beta cyclodextrin, and belongs to the technical field of blue fluorescent copper nanoclusters. Background technique [0002] Noble metal nanoclusters have broad excitation bands, narrow emission bands, high quantum yields, tunable photoluminescence, etc. [0003] At present, the synthesis methods of copper nanoclusters (CuNCs) include stirring synthesis method, microwave-assisted method, sonochemical synthesis method, microemulsion method, etc., but these methods are time-consuming, complicated, involve toxic organic reagents, low quantum yield, poor stability, etc. Disadvantages: The method of synthesizing copper nanoclusters (CuNCs) using different molecular templates such as proteins, DNA, and small thioligands is easily oxidized and difficult to control in size. [0004] Disadvantages of copper nanoclusters in the prior art: [0005] (1) Du...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/02C09K11/58
CPCC09K11/025C09K11/58
Inventor 凌剑李钰文秋林刘安勇
Owner YUNNAN UNIV
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