Reinforced rare earth doped nano upconversion photosensitive material, preparation method and application thereof
A photosensitive material and rare earth doping technology, applied in the field of dye-sensitized UCNPs up-conversion system, can solve the problem of insignificant improvement of up-conversion efficiency, and achieve the effects of being beneficial to large-scale implementation, high energy transfer efficiency, and improving compound ratio.
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[0034] As another aspect of the technical solution of the present invention, it relates to the preparation method of the aforementioned enhanced rare earth-doped nano-upconversion photosensitive material, which includes:
[0035] In a protective atmosphere, in the presence of a strong base, the uniformly mixed reaction system comprising cyanine dye (IR-783), hydroxyl compound and the first organic solvent is reacted at room temperature for 1 to 5 hours to obtain the enhanced Rare earth-doped nanoscale upconversion photosensitive materials.
[0036] Wherein, the hydroxy compound includes but not limited to 1-(4-hydroxybenzene)-1,2,2-triphenylethylene, 4-(2,2-diphenylvinyl)phenol and 4-(pyrene-1 - at least any one of methyleneamino) phenol and the like. The invention suppresses the aggregation of the photosensitive material through the large steric hindrance effect of the hydroxyl compound.
[0037]In some embodiments, the molar ratio of the cyanine dye to the hydroxyl compoun...
Embodiment 1
[0055] Add 0.1 g of NaH and 3 ml of anhydrous DMF into the three-necked flask, pass nitrogen gas for 5 minutes, add 0.7 g (2 mmol) of 1-(4-hydroxybenzene)-1,2,2-triphenylethylene, stir at room temperature for half an hour, and the system turns yellow. Quickly add 0.75g (1mmol) IR-783 in 2ml DMF solution, the green color of IR-783 will gradually turn dark yellow after adding to the system. Stir the reaction at room temperature under nitrogen protection for 3 h. After the reaction, CO was introduced into the system 2 Saturation, the system gradually turns green. The green reaction solution was added dropwise into 40 ml of glacial ether, the precipitate was collected by centrifugation, dispersed with 20 ml of acetone and washed three times. Finally, it was sonicated with dichloromethane, the precipitate was removed by centrifugation, and the solution was rotary evaporated at 30° C. under reduced pressure to obtain 0.44 g of a green solid product. After calculation, the yield ...
Embodiment 2
[0061] Add 0.1 g of NaH and 3 ml of anhydrous DMF into the three-necked flask, pass nitrogen gas for 5 min, add 0.7 g (2 mmol) of 1-(4-hydroxybenzene)-1,2,2-triphenylethylene, and stir at room temperature for half an hour. A solution of 0.74 g (1 mmol) IR-780 in 2 ml of DMF was quickly added, and the reaction was stirred at room temperature under nitrogen protection for 3 h. After the reaction, dilute hydrochloric acid was added dropwise to make it acidic. The reaction solution was added to 40 ml of ice-cold acetone, and the precipitate was collected by centrifugation to obtain 0.68 g of a green solid product. After calculation, the yield of this embodiment is 66%.
[0062] After testing, the nuclear magnetic data of the product obtained in this embodiment is: 1 H NMR (DMSO-d 6 , 400MHz ppm) δ: 7.77(d, J=6Hz 2H), 7.59(d, J=4Hz 2H), 7.44-7.42(m, 4H), 7.30-7.26(m, 2H), 7.13-7.06(m, 9H), 7.02-6.94(m, 8H), 6.88-6.86(m, 2H), 6.21(d, J=8Hz 2H), 4.16(s, 4H), 2.71(s, 4H), 2.25(t, ...
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