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Method for separating yellow fluorescent substances from carbon quantum dots

A technology of carbon quantum dots and yellow fluorescence, which is applied in the field of separating yellow fluorescent substances, can solve the problems of unclear formation mechanism of fluorescent light sources of carbon quantum dots, unfavorable development and application of carbon quantum dots, etc.

Pending Publication Date: 2022-03-22
郑州中科生物医学工程技术研究院
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the synthesis process of this type of carbon quantum dots, due to the complexity of multi-level reactions, the fluorescence light source and its formation mechanism of carbon quantum dots are unclear, which is not conducive to the development and application of this type of carbon quantum dots.

Method used

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  • Method for separating yellow fluorescent substances from carbon quantum dots
  • Method for separating yellow fluorescent substances from carbon quantum dots
  • Method for separating yellow fluorescent substances from carbon quantum dots

Examples

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Embodiment 1

[0025] The method for separating the yellow fluorescent substance from the carbon quantum dots of the present embodiment comprises the following steps:

[0026] (1) 2 g of o-phenylenediamine was dissolved in 20 mL of absolute ethanol, sonicated for 15 min until the mixture was clear, then the mixture was transferred to a 100 mL polytetrafluoroethylene-lined stainless steel autoclave and heated at 180 °C for 8 h. When the autoclave was cooled to room temperature, a dark brown solution was obtained.

[0027] (2) Mix the dark brown solution with silica gel (greagent analytical grade, 200-300 mesh silica gel; the dosage is generally 3-5 g; in this example, the dosage is 3 g), and dry with a rotary evaporator. Take dichloromethane (DMC) and methanol as the eluent, mix with the mixture obtained by rotary evaporation (the amount of eluent can be 800-1000mL; the amount of this embodiment is 800mL), and elute through the chromatographic column, and the chromatographic column packing is...

Embodiment 2

[0029] The method for separating the yellow fluorescent substance from the carbon quantum dots of this embodiment differs from that of Embodiment 1 only in that:

[0030] In step (1), the consumption of o-phenylenediamine is 0.5g. The temperature of the solvothermal reaction was 180°C, and the heating time was 7h.

Embodiment 3

[0032] The method for separating the yellow fluorescent substance from the carbon quantum dots of this embodiment differs from that of Embodiment 1 only in that:

[0033] In step (1), the consumption of o-phenylenediamine is 3g. The temperature of the solvothermal reaction was 190°C, and the heating time was 9h.

[0034] 2. Experimental example

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Abstract

The invention belongs to the field of carbon quantum dots, and particularly relates to a method for separating yellow fluorescent substances from carbon quantum dots. The method comprises the following steps: (1) by taking o-phenylenediamine as a carbon source and a nitrogen source, carrying out solvothermal reaction in absolute ethyl alcohol to obtain a carbon quantum dot solution; (2) mixing the carbon quantum dot solution with silica gel, and drying to remove the solvent to obtain a mixture; dichloromethane and methanol are used as eluents, and a chromatographic column is used for separating a yellow compound from the carbon quantum dots; in the eluent, the volume ratio of dichloromethane to methanol is 40: 1. The 2-amino-3-hydroxyphenazine fluorescent micromolecules are separated from the carbon quantum dots synthesized from o-phenylenediamine precursors for the first time, and the method has important significance in research on fluorescent light sources of the carbon quantum dots and formation mechanisms of the carbon quantum dots. After 2-amino-3-hydroxyphenazine is separated from the carbon quantum dots, the fluorescence property is changed, and the carbon quantum dots can be developed to be used as a new fluorescence sensing platform.

Description

technical field [0001] The invention belongs to the field of carbon quantum dots, in particular to a method for separating yellow fluorescent substances from carbon quantum dots. Background technique [0002] Carbon quantum dots have attracted extensive attention from researchers due to their tunable emission spectra, excellent photostability, low cytotoxicity, excellent water solubility, good biocompatibility, and low preparation cost. As a fluorescent sensing platform, carbon quantum dots have good analysis and monitoring capabilities for various ions and small molecules. [0003] For example, the Chinese invention patent application with the publication number CN113025319A uses curcumin as a precursor to synthesize a carbon dot for the detection of progesterone, and finally achieves a low detection limit and rapid detection of progesterone. Studying the emission and origin of fluorescence in carbon quantum dots is of great significance to scientifically guide the analysi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D241/46C09K11/06C09K11/65
CPCC07D241/46C09K11/06C09K11/65C09K2211/1044
Inventor 昝明辉董文飞曹磊郄兴旺吴再辉安帅刘莹刘派王东
Owner 郑州中科生物医学工程技术研究院
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