Method and product for preparing carbon dots by using bromoacetonitrile and imidazole compounds
A compound, imidazole technology, applied in the field of preparation of nano-luminescent materials, achieves the effects of short reaction time, good fluorescence performance, water solubility, and no energy consumption
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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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