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Preparation method of copper nano-clusters with adjustable and controllable fluorescent color

A copper nano-cluster and color technology, applied in the field of metal nano-cluster preparation, can solve the problems of few aggregation-induced preparation methods and uneven size of nano-cluster particles, and achieve the effects of low cost, simple preparation method and high stability

Active Publication Date: 2018-06-08
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, nanocluster aggregation induction methods mainly include solvent and cation induction methods, but the size of nanocluster particles obtained by these two methods is not uniform.
At the same time, the current nanocluster methods based on induced aggregation are generally gold and silver nanoclusters, and the aggregation-induced preparation methods of copper nanoclusters are less

Method used

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  • Preparation method of copper nano-clusters with adjustable and controllable fluorescent color
  • Preparation method of copper nano-clusters with adjustable and controllable fluorescent color
  • Preparation method of copper nano-clusters with adjustable and controllable fluorescent color

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Dissolve 30 mg of tetramethylammonium bromide and 68 mg of copper chloride dihydrate in 8 ml of deionized water, mix and stir at 750 rpm for 30 minutes at a temperature of 20°C. Weighed 3.8 mg of sodium borohydride and dissolved it in 2 ml of deionized water, and slowly added it dropwise to the above mixture, a solid was precipitated, and the reaction was continued for 4 hours with stirring. The above reaction solution was transferred to a 10ml centrifuge tube and centrifuged (12500g, 30 minutes) to obtain a precipitate. The precipitate was washed with water and centrifuged, specifically adding 10 ml of deionized water to resuspend the precipitate, and then centrifuged (12500 g, 30 minutes) to obtain the precipitate. Washing with water and centrifugation was repeated three times, and the precipitate was vacuum-dried to obtain a solid product of copper nanoclusters. analyzed by transmission electron microscopy (see figure 1 , figure 2 ) The solid product obtained is ...

Embodiment 2

[0029] 42 mg of tetraethylammonium bromide and 68 mg of copper chloride dihydrate were dissolved in 8 ml of deionized water, mixed and then stirred at a stirring speed of 750 rpm for 30 minutes at a temperature of 30°C. 17.6 mg of ascorbic acid was weighed and dissolved in 2 ml of deionized water, and slowly added dropwise to the above mixed solution, a solid was precipitated, and the stirring reaction was continued for 1 hour. The above reaction solution was transferred to a 10ml centrifuge tube and centrifuged (12500g, 20 minutes) to obtain a precipitate. The precipitate was washed with water and centrifuged, specifically adding 10 ml of deionized water to resuspend the precipitate, and then centrifuged (12500 g, 20 minutes) to obtain the precipitate. Washing with water and centrifugation was repeated three times, and the precipitate was vacuum-dried to obtain a solid product of copper nanoclusters. The solid product obtained by transmission electron microscopy analysis is ...

Embodiment 3

[0031] Dissolve 86 mg of tetrahexylammonium bromide and 85 mg of copper chloride dihydrate in 8 ml of deionized water, mix and stir at 750 rpm for 30 minutes at a temperature of 25°C. Weighed 7.6 mg of sodium borohydride and dissolved it in 2 ml of deionized water, and slowly added it dropwise to the above mixture, a solid was precipitated, and the reaction was continued for 3 hours with stirring. The above reaction solution was transferred to a 10ml centrifuge tube and centrifuged (12500g, 15 minutes) to obtain a precipitate. The precipitate was washed with water and centrifuged, specifically adding 10 ml of deionized water to resuspend the precipitate, and then centrifuged (12500 g, 15 minutes) to obtain the precipitate. Washing with water and centrifugation was repeated three times, and the precipitate was vacuum-dried to obtain a solid product of copper nanoclusters. The resulting solid copper nanoclusters were further analyzed by transmission electron microscopy.

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Abstract

The invention relates to a preparation method of copper nano-clusters with an adjustable and controllable fluorescent color. The method comprises the following steps: dissolving copper metal salt andquaternary ammonium salt into de-ionized water; then carrying out reduction reaction; after reacting, separating and purifying to obtain the copper nano-clusters with a high fluorescent quantum yield.The method provided by the invention is simple and convenient to operate and short in consumed time, moderate in reaction conditions and does not need a large-size instrument; the copper nano-clusters capable of emitting fluorescent light with different wavelengths can be obtained through adjusting alkyl chain lengths of the different quaternary ammonium salt. The preparation method has the characteristics that the fluorescent quantum yield of the obtained copper nano-clusters is high; meanwhile, the fluorescent emission wavelength also has the characteristic that the wavelength is changed along changes of the alkyl chain lengths of the quaternary ammonium salt. By adopting the characteristics, the prepared copper nano-clusters have extremely great potential application value in the aspects of preparation of photoelectric and luminescent devices, biological imaging, sensing detection and the like.

Description

technical field [0001] The invention belongs to the technical field of metal nano-cluster preparation, and in particular relates to a preparation method of copper nano-cluster whose fluorescent color can be adjusted. Background technique [0002] Metal nanoclusters consist of a few to hundreds of atoms and have molecular-like optical properties. Compared with organic dyes and semiconductor quantum dots, metal nanoclusters have the advantages of ultra-small particle size, low toxicity, good biocompatibility, and large Stokes shift. At present, a large number of gold and silver nanoclusters have been prepared for biological imaging, sensing analysis and detection, optoelectronic devices and so on. Copper nanoclusters have similar luminescent properties to gold and silver nanoclusters, and copper is widely distributed in nature, so the preparation and fluorescence properties of copper nanoclusters have attracted much attention. [0003] However, the fluorescent properties of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24C09K11/58B82Y40/00
CPCB22F9/24B82Y40/00C09K11/58
Inventor 陈淑琴王昱冯亮
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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