Preparation and biological application of a one-photon/two-photon amorphous carbon dot
An amorphous carbon and two-photon technology, applied in the field of preparation of fluorescent carbon nanomaterials, can solve the problems of low quantum yield of carbon dots, complex synthesis process, low quantum yield, etc., and achieve strong single-photon/two-photon fluorescence performance. , the preparation process is simple, the water solubility is good
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Embodiment 1
[0045] Weigh 20mmol of N,N'-methylenebisacrylamide into a 50ml reaction flask, add 10ml of deionized water, N,N-dimethylformamide or a mixture of N,N-dimethylformamide / water Solvent, mix well, then add 20mmol of 1-(2-aminoethyl)piperazine under magnetic stirring, after sealing, pass nitrogen for 10 to 15 minutes, place in a constant temperature water bath at 60°C and stir for 120 hours. Naturally cooled to room temperature to obtain a light yellow viscous solution, which was precipitated and washed with acetone, the precipitated product was dissolved and then precipitated again, and the above process was repeated 1 to 2 times. Pale yellow polymer. By adjusting the volume ratio of solvent water to N,N-dimethylformamide, a series of polyamide-amines with different branched structures can be synthesized.
[0046] Weigh 100 mg of polyamide-amine solid and 1.051 g of citric acid solid, dissolve in 10 mL of deionized water, ultrasonically disperse until fully dissolved, and move th...
Embodiment 2
[0054] Weigh 20mmol of N,N'-methylenebisacrylamide into a 50ml reaction flask, add 10ml of deionized water, N,N-dimethylformamide or a mixture of N,N-dimethylformamide / water Solvent, mix well, then add 20mmol of 1-(2-aminoethyl)piperazine under magnetic stirring, after sealing, pass nitrogen for 10 to 15 minutes, place in a constant temperature water bath at 60°C and stir for 120 hours. Naturally cooled to room temperature to obtain a light yellow viscous solution, which was precipitated and washed with acetone, the precipitated product was dissolved and then precipitated again, and the above process was repeated 1 to 2 times. Pale yellow polymer. By adjusting the volume ratio of solvent water to N,N-dimethylformamide, a series of polyamide-amines with different branched structures can be synthesized.
[0055] Weigh 200 mg of polyamide-amine solid and 1.5 g of citric acid solid, dissolve in 10 mL of deionized water, ultrasonically disperse until fully dissolved, and move the ...
Embodiment 3
[0061] 1. Weigh 20mmol of N,N'-methylenebisacrylamide and place it in a 50ml reaction flask, add 10ml of deionized water, N,N-dimethylformamide or N,N-dimethylformamide / water The mixed solvent was mixed uniformly, then 20mmol of 1-(2-aminoethyl)piperazine was added under magnetic stirring, after sealing, nitrogen was passed through for 10 to 15 minutes, and the reaction was stirred for 120 hours in a constant temperature water bath at 60°C. Naturally cooled to room temperature to obtain a light yellow viscous solution, which was precipitated and washed with acetone, the precipitated product was dissolved and then precipitated again, and the above process was repeated 1 to 2 times. Pale yellow polymer. By adjusting the volume ratio of solvent water to N,N-dimethylformamide, a series of polyamide-amines with different branched structures can be synthesized.
[0062] 2. Weigh 1.051g of citric acid and 5mg of polyamidoamine, 1.051g of citric acid and 100mg of polyamidoamine, and ...
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