Method for rapid synthesis of high fluorescence copper nanoclusters using polymer film as carrier

A technology of fluorescent copper nanoclusters and polymer films, which is applied in the field of preparation of fluorescent nanomaterials, can solve the problems of complex synthesis steps, low fluorescence intensity of copper nanoclusters, and long reaction time, so as to shorten reaction time, reduce energy, and improve Effect of Fluorescence Intensity

Inactive Publication Date: 2018-12-11
DALIAN UNIV OF TECH
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[0005] The invention realizes the rapid synthesis of high-fluorescence copper nanoclusters with chitosan film as a carrier through a one-st...

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  • Method for rapid synthesis of high fluorescence copper nanoclusters using polymer film as carrier
  • Method for rapid synthesis of high fluorescence copper nanoclusters using polymer film as carrier
  • Method for rapid synthesis of high fluorescence copper nanoclusters using polymer film as carrier

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Embodiment 1～5

[0025] A method for rapidly synthesizing high-fluorescence copper nanoclusters with a polymer film as a carrier, said method comprising the steps of:

[0026] (1) Weigh a certain mass of chitosan, add dropwise glacial acetic acid to dissolve it completely, and prepare a chitosan solution with a concentration of 2%.

[0027] (2) At room temperature, glutathione solution (2.5mL, 0.1M) and copper nitrate trihydrate solution are added to the chitosan solution obtained in step (1), and the resulting mixed solution is stirred evenly; control glutathione The molar ratio of peptide to copper nitrate trihydrate was 5:1. See Table 1 for the different molar ratios of Examples 1-5.

[0028] (3) The mixed solution obtained in step (2) was reacted for 6 hours in a blower bellows at 40°C.

[0029] The maximum excitation and emission wavelengths of the chitosan film / copper nanocluster composite were 345nm and 366nm ( figure 1 ). UV absorption spectrum ( figure 2 ) has no obvious absorpt...

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Abstract

The invention belongs to the technical field of preparation of luminescent nanometer materials and provides a method for rapid synthesis of high fluorescence copper nanoclusters using a polymer film as a carrier. The method includes 1), weighing a certain amount of chitosan, dropping glacial acetic acid to dissolve the chitosan completely, and configuring a chitosan solution with the mass percentage concentration of 1.5%-2.5%; 2), under room temperature, adding a glutathione solution and a cuprous nitrate trihydrate solution to the chitosan solution obtained in the step 1) and evenly stirringa mixed solution obtained, wherein the molar ratio of glutathione to copper nitrate trihydrate is 0.5:1-10:1; 3), allowing the mixed solution obtained in the step 2) to react for 5-7 hours in a blastbellow at the temperature of 35-45DEG C. With the method, the high fluorescence copper nanoclusters can be rapidly synthesized, the chitosan film serving as a good nanoreactor can protect the copper nanoclusters, energy loss from non-radiative transitions is reduced, and fluorescence strength is thereby improved.

Description

technical field [0001] The invention relates to a method for rapidly synthesizing high-fluorescence copper nano-clusters with a polymer film as a carrier, and belongs to the technical field of preparation of fluorescent nano-materials. Background technique [0002] Metal nanoclusters are a class of molecular-level aggregates composed of several to dozens of metal atoms with a "core-shell" structure. Due to the size effect due to the size smaller than the Fermi wavelength of electrons, it has excellent physical / chemical and optical properties. Photofluorescence is an important property in the UV-vis region compared to larger metal nanoparticles. In addition to the noble metals gold and silver, cheap, nontoxic, and abundant copper nanoclusters have also been extensively studied. However, since copper is more active and easily oxidized and it is difficult to control the uniform particle size during the synthesis process, the synthesis of copper nanoclusters with high fluoresc...

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Application Information

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IPC IPC(8): B22F9/24B22F1/00C09K11/58B82Y30/00B82Y40/00
CPCC09K11/58B82Y30/00B82Y40/00B22F9/24B22F2009/245B22F1/07
Inventor 韩冰雁胡茜茜姜静美闫琴贺高红
Owner DALIAN UNIV OF TECH
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