Red fluorescent silver nano-cluster probe as well as preparation method and application thereof

A technology of silver nanoclusters and red fluorescence, which is applied in nanotechnology, nanotechnology, fluorescence/phosphorescence, etc., can solve the problems of copper nanocluster biological detection interference and cumbersome synthesis process, and achieve large activation energy and water solubility Good, simple preparation method

Inactive Publication Date: 2017-10-03
SHANXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the synthesis process is cumbersome, and blue fluorescent c

Method used

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  • Red fluorescent silver nano-cluster probe as well as preparation method and application thereof
  • Red fluorescent silver nano-cluster probe as well as preparation method and application thereof
  • Red fluorescent silver nano-cluster probe as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Preparation of red fluorescent silver nanocluster probes using captopril as template:

[0034] (1) Configure 25mmol / L silver nitrate 2mL, under constant stirring, add 50mmol / L captopril 1mL to the silver nitrate solution, continue stirring to fully mix the two, the content of silver nitrate and captopril The quantity ratio is 1:1;

[0035] (2) Add 1mol / L sodium hydroxide solution to the mixed solution of step (1), the volume of which is 0.17mL, and continue to stir at room temperature for 15min;

[0036] (3) Add 10mmol / L sodium borohydride solution configured in an ice bath to the mixed solution obtained in step (2), the volume of which is 0.8mL and continue to stir for 30min at room temperature;

[0037] (4) Dialyzing the mixed solution obtained in step (3) for 48 hours to finally obtain a red fluorescent silver nanocluster probe solution.

[0038] The schematic diagram of the action mechanism of the prepared red fluorescent silver nanocluster probe is shown in figu...

Embodiment 2

[0042] Fluorescent intensity of the fluorescent silver nanocluster probe solution prepared in Example 1 as a function of temperature variation experiment:

[0043] Take 200 μL of the fluorescent silver nanocluster probe solution prepared in Example 1 and add it to 800 μL water at different temperatures. The excitation wavelength is fixed at 445 nm, and the fluorescence spectrum is detected. Effect of cluster probe solution on fluorescence peak intensity.

[0044] The effect of different temperatures on the fluorescence peak intensity of the fluorescent silver nanocluster probe solution is shown in Figure 4 : Under 445nm excitation, the fluorescence peak intensity of the fluorescent silver nanocluster probe solution decreases gradually with the increase of temperature; the temperature values ​​are 10, 15, 19, 25, 32, 37, 41 and 45℃ respectively for the fluorescent silver nanocluster The fluorescence spectrogram of the influence of the fluorescence peak intensity of the cluste...

Embodiment 3

[0046] The fluorescent silver nanocluster probe solution prepared in embodiment 1 has good sensitivity to temperature:

[0047] pass Figure 4 From the data, the activation energy was calculated by the Arrhenius equation. from Figure 5The available activation energy is 337meV. Compared with other fluorescent nanomaterials as shown in Table 1, the present invention has high activation energy, indicating its high sensitivity.

[0048] Table 1 is the activation energy of different fluorescent nanomaterials

[0049]

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Abstract

The invention provides a red fluorescent silver nano-cluster probe as well as a preparation method and the application thereof. The red fluorescent silver nano-cluster probe is characterized in that captopril is adopted as a protective agent and sodium borohydride is adopted a reducing agent; and in an alkaline environment, a red fluorescent silver nano-cluster being uniform in size and high in stability is prepared. The preparation method has the advantages that the operation is simple, the cost is relatively low, the sources of raw materials are extensive, the raw materials are easy to obtain, and the repeatability is high. The prepared red fluorescent silver nano-cluster probe is high in water solubility and stability, and can be applied to pH measurement and temperature measurement in an acidic environment.

Description

technical field [0001] The invention relates to fluorescent nanometer materials, in particular to a red fluorescent silver nanocluster probe and a preparation method thereof, and the application of the probe in acidic environment pH detection and temperature detection. Background technique [0002] Metal nanoclusters are ultra-small nanoparticles with a metal core size less than 2nm. In recent years, metal nanoclusters with high fluorescence intensity and high stability have been intensively reported as novel fluorescent nanocluster probes for the detection of many kinds of targets. An obvious feature of metal nanoclusters is its strong photoluminescence, and has the characteristics of small size, non-toxicity, good water solubility, large Stocks shift, good photostability and strong resistance to photobleaching, which has attracted researchers. Wide interest. Silver nanoclusters have gradually become an important part of metal nanomaterials, and are widely used in chemica...

Claims

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Application Information

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IPC IPC(8): B22F9/24B22F1/00G01K11/20G01N21/64C09K11/58B82Y30/00B82Y40/00
CPCG01K11/20G01N21/64C09K11/58B82Y30/00B82Y40/00B22F9/24B22F1/07B22F1/0545
Inventor 张国梅郭肖红张彩红张彦双少敏董川
Owner SHANXI UNIV
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