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A kind of deep eutectic solvent, its application and carbon quantum dot and preparation method thereof

A low eutectic solvent, carbon quantum dot technology, applied in chemical instruments and methods, nano-carbon, luminescent materials, etc., can solve the problems of low quantum yield, unstable fluorescence ability of carbon quantum dots, cumbersome operation, etc. Reaction temperature, enhancement of photo-induced charge transfer properties, and effects of increasing solubility

Active Publication Date: 2021-04-13
HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the problems of cumbersome operation, low quantum yield and unstable fluorescence ability of carbon quantum dots in the process of preparing carbon quantum dots in the prior art, the present invention provides a deep eutectic solvent, its application, carbon quantum dots and its preparation method

Method used

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  • A kind of deep eutectic solvent, its application and carbon quantum dot and preparation method thereof
  • A kind of deep eutectic solvent, its application and carbon quantum dot and preparation method thereof
  • A kind of deep eutectic solvent, its application and carbon quantum dot and preparation method thereof

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Embodiment 1

[0036] The embodiment of the present invention provides a deep eutectic solvent prepared from 5-chloro-1-methyl-4-nitroimidazole and glycerol with a molar ratio of 1:7, specifically comprising the following steps:

[0037] Mix 0.01mol (1.62g) of 5-chloro-1-methyl-4-nitroimidazole and 0.07mol (6.45g) of glycerol, heat up to 90°C, and react at constant temperature for 3 hours to make the system uniform and transparent. A nitroimidazole deep eutectic solvent was obtained.

Embodiment 2

[0039] The embodiment of the present invention provides a deep eutectic solvent prepared from 2-chloro-4-nitroimidazole and ethylene glycol in a molar ratio of 1:8, specifically comprising the following steps:

[0040] Mix 0.01mol (1.48g) of 2-chloro-4-nitroimidazole and 0.08mol (4.97g) of ethylene glycol, heat up to 105°C, and react at a constant temperature for 2 hours to make the system uniform and transparent to obtain nitroimidazoles Deep eutectic solvent.

Embodiment 3

[0042] The embodiment of the present invention provides a deep eutectic solvent prepared from 5-chloro-1-methyl-4-nitroimidazole and ethylene glycol in a molar ratio of 1:9, specifically comprising the following steps:

[0043] Mix 0.01mol (1.62g) of 5-chloro-1-methyl-4-nitroimidazole and 0.09mol (5.58g) of ethylene glycol, heat up to 115°C, and react at constant temperature for 1 hour to make the system uniform and transparent. A nitroimidazole deep eutectic solvent was obtained.

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Abstract

The invention relates to the technical field of carbon material preparation, and specifically discloses a deep eutectic solvent, its application, carbon quantum dots and a preparation method thereof. The deep eutectic solvent is prepared from nitroimidazole compounds and alcohol compounds with a molar ratio of 1:7-9. The preparation method of the carbon quantum dots is as follows: reacting the deep eutectic solvent with cellulose nano crystals. The diameter distribution of the prepared carbon quantum dots is 1-5nm, the fluorescence quantum yield is 20-25%, has good photoluminescence and high light resistance, and the preparation method provided by the invention not only reduces the production process pollution, improves the utilization rate of materials, and has simple process, convenient operation, low cost, low toxicity and environmental protection, is a low-cost, eco-friendly and resource-saving preparation method, and has broad application prospects.

Description

technical field [0001] The invention relates to the technical field of carbon material preparation, in particular to a deep eutectic solvent, its application, carbon quantum dots and its preparation method. Background technique [0002] Carbon quantum dots refer to semiconductor nanocrystals with a radius smaller than or close to the laser Bohr radius. They are nano-sized particles with unique optical and electrical properties, and are a new type of carbon-based zero-dimensional material. As a nano-fluorescent material, compared with traditional organic dye molecules, it has excellent optical properties, good electrical conductivity, water solubility, low toxicity, environmental friendliness, wide source of raw materials, low cost, good biocompatibility, etc. Advantages, it has application value in the fields of light-emitting devices, biomarkers, biodetection and biosensors. [0003] At present, the synthesis methods of carbon quantum dots mainly include hydrothermal metho...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/15C09K11/65B82Y20/00B82Y40/00
CPCB82Y20/00B82Y40/00C01P2004/03C01P2004/04C01P2004/64C09K11/65C01B32/15
Inventor 段二红李美玉任红威王灿廖中华何献文方家未
Owner HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
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