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Preparation method of green fluorescent copper nanoclusters by one-step synthesis

A green fluorescence, copper nanocluster technology, applied in the nano field, can solve the problems of non-green fluorescence, complex preparation, etc., and achieve the effects of simple synthesis conditions, good water solubility, improved accuracy and anti-interference ability.

Inactive Publication Date: 2019-01-04
YUNNAN UNIV
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  • Claims
  • Application Information

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Problems solved by technology

[0005] Through the search of the prior art, it is found that although the patent CN107603604A discloses a copper nanocluster fluorescent material and its preparation method, the fluorescence peak position of the copper nanocluster synthesized by the patent is at 498nm, but it is not really green fluorescence, and adopts "automatic "Top-down" method, that is, first synthesize large-particle copper nanoparticles, and then etch the particles into small copper nanoclusters, which is relatively complicated to prepare

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  • Preparation method of green fluorescent copper nanoclusters by one-step synthesis
  • Preparation method of green fluorescent copper nanoclusters by one-step synthesis
  • Preparation method of green fluorescent copper nanoclusters by one-step synthesis

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Embodiment 1

[0023] Add 0.01M Cu(NO 3 ) 2 1 mL, after preheating and stirring for 2 min, add 6.0 mL of 0.2M ascorbic acid under vigorous stirring, and adjust the pH to 2.0 with HCl after stirring. Then keep the state of rapid stirring for about 2.0h until the color of the solution turns light yellow, and the reaction can be stopped when the obvious green fluorescence is detected under 365nm ultraviolet light, indicating that AA-CuNCs have been synthesized. At this point, the resulting green fluorescent copper nanoclusters were characterized.

[0024] From attached figure 1 It can be seen from the fluorescence spectrum of the copper nanocluster that the maximum excitation wavelength of the synthesized green copper nanocluster is 376nm, and the maximum emission wavelength is 534nm. From attached figure 2 It can be seen from the UV-vis absorption spectrum of copper nanoclusters that there is no obvious absorption peak in its ultraviolet absorption, indicating that we have synthesized nan...

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Abstract

The invention provides a preparation method of green fluorescent copper nanoclusters by one-step synthesis, aiming at the defects in the prior art. The fluorescent peak position of the synthesized copper nanoclusters synthesized by the method is about 530 nanometers, and the copper nanoclusters are definitely green fluorescent. Copper nanoclusters were synthesized by a "bottom-up" method using reduced copper ions directly and prepared by the one-step synthesis.

Description

technical field [0001] The invention relates to the field of nanotechnology, in particular to a preparation method for synthesizing green fluorescent copper nanoclusters in one step. Background technique [0002] The synthesis of fluorescent copper nanoclusters has always been a hot research direction for scientists. Due to the active nature of copper, it is difficult to synthesize stable and fluorescent copper nanoclusters. At present, the synthesis steps of copper nanoclusters are relatively cumbersome and the conditions are harsh, and there are many shortcomings in the preparation process, such as long time-consuming, low solubility, high energy consumption, and low quantum yield. Due to the relatively active nature of copper, even through a complex synthesis process, the resulting product has poor oxidation resistance and unstable fluorescence properties. [0003] On the other hand, the emission peak of the fluorescent nanoclusters is related to the size and stability ...

Claims

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Application Information

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IPC IPC(8): B22F9/24C09K11/58B82Y40/00
CPCB22F9/24B22F2009/245B82Y40/00C09K11/58
Inventor 凌剑卢钒韩彩玲刘安勇
Owner YUNNAN UNIV
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