A fluorescent switchable upconverting nanoparticle
A nanoparticle and carbon nanoparticle technology, which is applied in the direction of luminescent materials, chemical instruments and methods, etc., can solve the problem of switching or adjusting the fluorescence emission of fluorescent carbon particles, difficult processing into films or fibers, and limited up-conversion fluorescent carbon nanometers. Particle application and other issues, to achieve the effects of easy processing into films and nanofibers, small size, and good processability
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Embodiment 1
[0037]Weigh 100 mg of fluorescent carbon nanoparticles, dissolve them in 20 mL of dichloromethane, and prepare a 5 mg / mL solution of fluorescent carbon nanoparticles; then weigh 50 mg of chain transfer agent S-1-dodecyl-S'-(α,α '-Dimethyl-α''-acetic acid) trithiocarbonate, 50 mg of dicyclohexylcarbodiimide (DCC) and 5 mg of 4-dimethylaminopyridine (DMAP), added to the prepared fluorescent carbon nanoparticle solution . React at room temperature for 7 days. After 7 days, filter the reactant and spin dry to obtain a solid. Dissolve the obtained solid with ethanol. Put the dissolved ethanol solution in a dialysis bag with a molecular weight cut-off of 100-500D, and dialyze in ethanol for 48 hours Finally, the ethanol solution in the dialysis bag is spin-dried to obtain the carbon particle chain transfer agent.
[0038] Weigh 0.2 mg of the obtained carbon particle chain transfer agent, 900 mg of styrene, 20 mg of acrylamido spiropyran, and 1 mg of initiator azobisisobutyronitrile...
Embodiment 2
[0040] Weigh 100 mg of fluorescent carbon nanoparticles, dissolve them in 20 mL of dichloromethane, and prepare a 5 mg / mL solution of fluorescent carbon nanoparticles; then weigh 50 mg of chain transfer agent S-1-dodecyl-S'-(α,α '-Dimethyl-α''-acetic acid) trithiocarbonate, 50mg, dicyclohexylcarbodiimide (DCC) and 5mg of 4-dimethylaminopyridine (DMAP), add the prepared fluorescent carbon nano in the particle solution. React at room temperature for 7 days. After 7 days, filter the reactant and spin dry to obtain a solid. Dissolve the obtained solid with ethanol. Put the dissolved ethanol solution in a dialysis bag with a molecular weight cut-off of 100-500D, and dialyze in ethanol for 48 hours Finally, the ethanol solution in the dialysis bag is spin-dried to obtain the carbon particle chain transfer agent.
[0041] Weigh 0.2 mg of carbon particle chain transfer agent, 900 mg of styrene, 20 mg of acrylamido spiropyran, and 1 mg of initiator azobisisobutyronitrile AIBN. The po...
Embodiment 3
[0043] Weigh 100 mg of fluorescent carbon nanoparticles, dissolve them in 20 mL of dichloromethane, and prepare a 5 mg / mL solution of fluorescent carbon nanoparticles; then, weigh 50 mg of chain transfer agent S-1-dodecyl-S'-(α, α'-dimethyl-α''-acetic acid) trithiocarbonate, 50mg of dicyclohexylcarbodiimide (DCC) and 5mg of 4-dimethylaminopyridine (DMAP), add the prepared fluorescent carbon nano in the particle solution. React at room temperature for 7 days. After 7 days, filter the reactant and spin dry to obtain a solid. Dissolve the obtained solid with ethanol. Put the dissolved ethanol solution in a dialysis bag with a molecular weight cut-off of 100-500D, and dialyze in ethanol for 48 hours Finally, the ethanol solution in the dialysis bag is spin-dried to obtain the carbon particle chain transfer agent.
[0044] Weigh 0.2 mg of carbon particle chain transfer agent, 900 mg of styrene, 20 mg of acrylamido spiropyran, and 1 mg of initiator azobisisobutyronitrile AIBN, and ...
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