White fluorescent polymeric compounds, and preparation and use thereof
A fluorescent polymer and white technology, applied in the field of fluorescent polymers, can solve problems such as high cost, change, and limited application range, and achieve the effects of low concentration, reduced processing cost, and low cost
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Embodiment 1
[0060] Embodiment 1, preparation of white light fluorescent material
[0061] 1) Synthesis of red light monomer
[0062] Dissolve 2.1 mmol of rhodamine B in 1,2-dichloroethane, slowly drop into 0.7 ml of thionyl chloride at room temperature, stir the solution and reflux for 6 hours, and distill off the solvent under reduced pressure after the reaction is completed to obtain For the crude product of rhodamine B acid chloride, add methylene chloride and stir to dissolve rhodamine B acid chloride completely; slowly add 6 mmol hydroxyethyl acrylate dropwise at room temperature, and stir the solution for 24 hours. After the reaction is completed, the solvent is distilled off under reduced pressure to obtain rhodamine containing The crude product of the monomer of the rhodamine group; the pure product of the monomer containing the rhodamine group was obtained by separating with a silica gel chromatography column.
[0063] Nuclear Magnetic Resonance Determination, 1H NMR (CDCl 3 , ...
Embodiment 2
[0091] 1) Dissolving the red, green and blue three-color fluorescent monomer and polymethyl methacrylate in the dichloromethane solution, then measure their ultraviolet absorption to obtain the corresponding ultraviolet absorption spectrum figure 1 ; Wherein, the abscissa is the wavelength (nm), and the ordinate is the absorbance (ABS).
[0092] 2) Figure 2 ~ Figure 4 It is the thin film fluorescence spectrum of the white light fluorescent material described in the embodiment of the present invention, the abscissa is the wavelength (nm), and the ordinate is the fluorescence intensity (A.U.). in, figure 2 It reflects the effect of the concentration of the fluorescent polymer on the fluorescence spectrum. It can be seen that even if the composition ratio of fluorescent groups of the polymer has been determined, the relative intensity of red light and blue-green light will still change with different concentrations. At low concentrations, blue-green light is stronger than red...
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