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

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...

AI Technical Summary

Problems solved by technology

[0005] The invention realizes the rapid synthesis of high-fluorescence copper nanoclusters with chitosan film as a carrier through a one-step method, and overcomes the disadvantages of low fluorescence intensity of copper nanoclusters, complex synthesis steps, long reaction time, etc.

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