Red fluorescent gold/copper nanocluster alloy as well as preparation method and application thereof

A technology of red fluorescence and copper nanometers, applied in fluorescence/phosphorescence, chemical instruments and methods, luminescent materials, etc., can solve the problems of poor luminescence performance, cumbersome synthesis process, and high cost, and achieve widely available raw materials and good water solubility , low-cost effect

Inactive Publication Date: 2015-12-30
SHANXI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The methods reported in these literatures are good, but there are also some shortcomings, such as: the synthesis p

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  • Red fluorescent gold/copper nanocluster alloy as well as preparation method and application thereof
  • Red fluorescent gold/copper nanocluster alloy as well as preparation method and application thereof
  • Red fluorescent gold/copper nanocluster alloy as well as preparation method and application thereof

Examples

Experimental program
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Example Embodiment

[0037] Example 1

[0038] Preparation of red fluorescent gold / copper nanocluster alloy using egg white as template:

[0039] (1) Add 0.50 g of egg white powder to 10 mL of deionized water, and ultrasonically dissolve to prepare a mixed solution;

[0040] (2) Pipette 2.0 mL (50 mg / mL) of the mixed solution obtained in step (1) into 2.0 mL of 10 mmol / L chloroauric acid solution, and stir to mix the two thoroughly;

[0041] (3) Add 0.2mL of 1mol / L sodium hydroxide solution to the mixed solution obtained in step (2), adjust the pH of the solution to 11-12; then, stir at 55°C for 2 minutes;

[0042] (4) Add 1.0mL of 3mmol / L copper nitrate solution to the mixed solution obtained in step (3), stir for 2min at 55°C; then add 10μL of 1mol / L sodium hydroxide solution, the solution will turn light yellow; Continue to stir and react for 12h at 55°C;

[0043] (5) Centrifuge the product obtained in step (4), centrifuge at 13000r / min for 10min, and dialyze it with a dialysis bag with a molecular weigh...

Example Embodiment

[0047] Example 2

[0048] The effect of pH value on the fluorescence peak intensity of the red fluorescent gold / copper nanocluster alloy solution prepared in Example 1:

[0049] Add 0.1 mL of the red fluorescent gold / copper nanocluster alloy solution prepared in Example 1 to 0.9 mL of phosphate buffer solutions with different pH values, fix the excitation wavelength at 380nm, and perform fluorescence spectroscopy detection at room temperature. According to 474.0nm, The change of the fluorescence peak intensity around 623.0nm was used as the ratio of the fluorescence intensity of the two peaks to detect the effect of pH on the red fluorescent gold / copper nanocluster alloy solution.

[0050] The effect of pH value on the fluorescence peak intensity of the red fluorescent gold / copper nanocluster alloy solution (F 623.0 / 474.0 ) See image 3 : Under the excitation of 380nm, the red fluorescent gold / copper nanocluster alloy solution in the pH range of 4.0-13.0, the fluorescence peak intens...

Example Embodiment

[0051] Example 3

[0052] The effect of ion intensity on the fluorescence peak intensity of the red fluorescent gold / copper nanocluster alloy solution prepared in Example 1:

[0053] Add 0.1mL of the red fluorescent gold / copper nanocluster alloy solution prepared in Example 1 to 0.9mL phosphate buffer solution (pH=7.0), fix the excitation wavelength at 380nm, and add different concentrations of sodium chloride solution (0~ 75mmol / L), perform fluorescence spectroscopy detection at room temperature, make the ratio of the fluorescence intensity of the two peaks based on changes in the fluorescence peak intensity around 474.0nm and 623.0nm, and detect the difference between the ion intensity and the red fluorescent gold / copper nanocluster alloy solution influences.

[0054] The effect of ion intensity on the fluorescence peak intensity of red fluorescent gold / copper nanocluster alloy solution (F 623.0 / 474.0 ) See Figure 4 : Under the excitation of 380nm, the red fluorescent gold / copper...

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Abstract

The invention provides a red fluorescent gold/copper nanocluster alloy as well as a preparation method and an application thereof. Egg white is taken as a template and a stabilizer, and the red fluorescent gold/copper nanocluster alloy with uniform size dimension and good stability is prepared from gold/copper in certain mole ratio with a one-pot method. The method is simple to operate, and the raw materials are widely sourced and easy to obtain and has good repeatability; besides, the prepared red fluorescent gold/copper nanocluster alloy has good water solubility and high fluorescent stability, adopts a double-peak structure and can be used for detection of silver ions in a water system, biological cell imaging and the like.

Description

technical field [0001] The invention relates to the technical field of fluorescent nanomaterials, in particular to a red fluorescent gold / copper nano-cluster alloy and a preparation method thereof, as well as the application of the nano-cluster alloy in the detection of silver ions. Background technique [0002] Metal nanoclusters are ultra-small nanoparticles with a size less than 2nm. As a new type of fluorescent luminophore, it has attracted the interest of extensive researchers as a fluorescent probe with good performance due to its advantages of low preparation cost, easy surface modification, good water solubility, and excellent optical properties. It has also become an important part of nanomaterials and is widely used in chemical analysis, bioimaging, biosensing, catalysis and other research fields. [0003] At present, most of the synthesis is gold, silver and copper nanoclusters, while the preparation and application of metal nanocluster alloys are less, which wil...

Claims

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Application Information

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IPC IPC(8): C09K11/58G01N21/64
Inventor 张国梅乔云云张彩红张彦双少敏
Owner SHANXI UNIV
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