Method and product for preparing carbon dots by using bromoacetonitrile and imidazole compounds

A technology of compounds and imidazoles is applied in the field of preparation of nano-luminescent materials to achieve the effects of controllable conditions, short reaction time, good fluorescence performance and water solubility

Active Publication Date: 2019-10-11
SOUTHWEST UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the above-mentioned synthesis methods all require additional energy, so there is an urgent need for a green, low-energy carbon dot synthesis method

Method used

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  • Method and product for preparing carbon dots by using bromoacetonitrile and imidazole compounds
  • Method and product for preparing carbon dots by using bromoacetonitrile and imidazole compounds
  • Method and product for preparing carbon dots by using bromoacetonitrile and imidazole compounds

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Utilize bromoacetonitrile and 1-methylimidazole to prepare the method for carbon point, comprise the following steps:

[0029] (1) Measure 2mL of bromoacetonitrile and 6mL of 1-methylimidazole respectively, pour them into a 50mL beaker, and stir rapidly to make the solutions mix evenly, and leave to react to obtain a reaction solution, which contains carbon dots;

[0030] (2) After naturally cooling the reaction solution obtained in step (1), centrifuge at a speed of 8000 rpm for 10 min in a high-speed centrifuge to obtain a supernatant; The filtrate was dialyzed with a dialysis bag with a molecular weight cut-off of 500 Da for 48 hours, and then freeze-dried to obtain carbon dot powder; finally, a part of the carbon dot powder was dispersed with ultrapure water and ethanol to obtain a carbon dot dispersion, which was stored at 4 °C.

Embodiment 2

[0032] Utilize bromoacetonitrile and 1-methylimidazole to prepare the method for carbon point, comprise the following steps:

[0033] (1) Measure 5mL of bromoacetonitrile and 10mL of 1-methylimidazole respectively, pour them into a 50mL beaker, and stir rapidly to make the solutions mix evenly, and leave to react to obtain a reaction solution, which contains carbon dots;

[0034] (2) After naturally cooling the reaction solution obtained in step (1), centrifuge at a speed of 8000 rpm for 10 min in a high-speed centrifuge to obtain a supernatant; The filtrate was dialyzed with a dialysis bag with a molecular weight cut-off of 500 Da for 48 hours, and then freeze-dried to obtain carbon dot powder; finally, a part of the carbon dot powder was dispersed with ultrapure water and ethanol to obtain a carbon dot dispersion, which was stored at 4 °C.

Embodiment 3

[0036] Utilize bromoacetonitrile and 1-methylimidazole to prepare the method for carbon point, comprise the following steps:

[0037] (1) Measure 5mL of bromoacetonitrile and 5mL of 1-methylimidazole respectively, pour them into a 50mL beaker, stir rapidly to make the solutions mix evenly, and leave to react to obtain the reaction solution, which contains carbon dots;

[0038] (2) After naturally cooling the reaction solution obtained in step (1), centrifuge at a speed of 8000 rpm for 10 min in a high-speed centrifuge to obtain a supernatant; The filtrate was dialyzed with a dialysis bag with a molecular weight cut-off of 500 Da for 48 hours, and then freeze-dried to obtain carbon dot powder; finally, a part of the carbon dot powder was dispersed with ultrapure water and ethanol to obtain a carbon dot dispersion, which was stored at 4 °C.

[0039] The obtained carbon dots are characterized:

[0040] figure 1 Transmission electron microscope image of carbon dots made for the ...

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Abstract

The invention discloses a method and product for preparing carbon dots by using bromoacetonitrile and imidazole compounds. Specifically, bromoacetonitrile directly reacts with 1-methylimidazole aftermixing to obtain the carbon dots. A synthesis process of the method is simple and green, the synthesized carbon dots have good fluorescence performance and light stability, and a novel method is provided for the synthesis of the carbon dots.

Description

technical field [0001] The invention relates to the preparation of nano-luminescent materials, in particular to a method for preparing carbon dots by using bromoacetonitrile and imidazole compounds, and also to products prepared by the method. Background technique [0002] Carbon dots are a new type of fluorescent nanoparticles. Due to their many advantages such as good fluorescence stability, low toxicity, high biocompatibility, and stable chemical properties, they have attracted extensive attention from researchers. Compared with traditional fluorescent materials such as organic dyes and semiconductor quantum dots, carbon dots have many advantages, such as very strong fluorescence, up-conversion luminescence performance, stable chemical properties, very good dispersion in water, low photobleaching, good Its excellent biocompatibility, low cost and low toxicity make it favored by scientists. Therefore, carbon dots have been widely used in many fields, including electrochem...

Claims

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Application Information

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IPC IPC(8): C09K11/65B82Y20/00B82Y40/00
CPCC09K11/65B82Y20/00B82Y40/00
Inventor 陈久存蒲建林金燕子邓志琴
Owner SOUTHWEST UNIVERSITY
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