A kind of fluorescent polymer and white light LED prepared by it and its preparation method
A fluorescent polymer and polymer technology, applied in chemical instruments and methods, luminescent materials, luminescent coatings, etc., can solve the problems of short emission wavelength and few applications of non-traditional fluorescent polymers, and achieve mature production technology and low production cost , the effect of easy industrial production
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Embodiment 1
[0062] Weigh 1g of sodium hydroxide and dissolve it in 20g of water; weigh 2g of MVL and put it into the aqueous solution of sodium hydroxide, and stir; after the MVL is completely dissolved, treat the solution at 50°C for 12 hours and then dry to obtain high fluorescence intensity The yellow fluorescent polymer has an absolute quantum yield of 31%, and its three-dimensional fluorescence spectrum is as follows figure 1 As shown, when the excitation range is 330nm-560nm, the strongest emission range is 530nm-570nm. The Fourier transform infrared spectrum of the fluorescent polymer is shown in Figure 5-1 As shown, among them 3500, 2972, 1725, 1583, 1414, 1260, 1035cm -1 Respectively -OH, -CH, C=O, COO - ion, -CH 3 , C-O-C, C-O group characteristic peaks. COO - Ion means that the raw material reacts with water-soluble hydroxide to form a carboxylate, such as sodium carboxylate in this example: -COO - Na + , as long as COO appears in the infrared spectrum - The characteri...
Embodiment 2
[0064] Weigh 1g of lithium hydroxide and dissolve in 2g of water; weigh 0.2g of MVL and put it into lithium hydroxide aqueous solution, and stir; after MVL is completely dissolved, treat the solution at 50°C for 12 hours and then dry to obtain high fluorescence Intensity red fluorescent polymer, its absolute quantum yield is 12%, and its three-dimensional fluorescence spectrum is as follows image 3 As shown, when the excitation range is 300nm-600nm, the strongest emission range is 575nm-670nm. The Fourier transform infrared spectrum of the fluorescent polymer is shown in Figure 5-2 As shown, among them 3500, 2972, 1725, 1583, 1414, 1260, 1035cm -1 Respectively -OH, -CH, C=O, COO - ion, -CH 3 , C-O-C, C-O group characteristic peaks.
Embodiment 3
[0066]Weigh 1g of potassium hydroxide and dissolve it in 2g of water; weigh 5g of MVC and put it into potassium hydroxide aqueous solution, and stir; after MVC is completely dissolved, treat the solution at 50°C for 12 hours and then dry to obtain high fluorescence intensity The blue light fluorescent polymer has an absolute quantum yield of 14%, and its three-dimensional fluorescence spectrum is as follows Figure 4 As shown, when the excitation range is 300nm-450nm, the strongest emission range is 450nm-520nm. The Fourier transform infrared spectrum of the fluorescent polymer is shown in Figure 5-3 As shown, among them 3500, 2972, 1725, 1583, 1414, 1260, 1035cm -1 Respectively -OH, -CH, C=O, COO - ion, -CH 3 , C-O-C, C-O group characteristic peaks.
[0067] White LED
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