Hydrogen bond/bromine bond synergistic assembly of bromine bond azopyridine/quantum dot light-emitting fiber and preparation method thereof
A bromine-bonded azopyridine and quantum dot luminescence technology, which is applied in the field of fluorescent materials, can solve the problems of poor photochemical stability, narrow ultraviolet absorption spectrum, and non-adjustable fluorescence emission wavelength, and achieve the goal of improving quantum yield and good luminescence performance Effect
Active Publication Date: 2022-07-19
BEIJING INSTITUTE OF GRAPHIC COMMUNICATION
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Problems solved by technology
[0006] However, the disadvantages of the current luminescent fibers are: the fluorescence emission wavelength is not adjustable, the fluorescence emission spectrum is too wide, the ultraviolet absorption spectrum is too narrow, and the photochemical stability is poor.
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Embodiment 1
[0048] (1) Preparation of bromine-bonded azopyridine / quantum dot light-emitting fibers assembled by hydrogen bond / bromine bond synergy
[0049] 1. Synthesis of intermediate 4-hydroxyazopyridine
[0050] Its preparation process is as follows:
[0051]
[0052] 1), place 4.00g (58mmol) sodium nitrite and 5.00g (53mmol) phenol in a 10% (w / w) aqueous sodium hydroxide solution (20mL), and cool it to 0°C to obtain a mixed solution;
[0053] 2), adding above-mentioned mixed solution dropwise to 45mL hydrochloric acid solution (25mL 11N hydrochloric acid and 20mL water) containing 6.00g (64mmol) 4-aminopyridine, stirring under ice bath for 0.5h to obtain reaction mixture;
[0054] 3), adjust the pH value of the reaction mixture obtained in step 2) to 6-7 with 10% (w / w) aqueous sodium hydroxide solution, filter to obtain a yellow precipitate, wash with water, recrystallize, and dry to obtain a yellow solid 4 -Hydroxyazopyridine; Yield: 38.0%;
[0055] 2. Synthesis of azopyridine de...
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The invention relates to a bromine bond azopyridine / quantum dot light-emitting fiber assembled by hydrogen bond / bromine bond synergy and a preparation method thereof, and belongs to the technical field of fluorescent material application. The preparation steps are as follows: (1) an intermediate 4-hydroxy azo Synthesis of pyridine; (2) Synthesis of azopyridine derivatives; (3) Synthesis of bromine bond azopyridine derivatives based on azopyridine derivatives; (4) Synthesis of bromine bond azopyridine / quantum dot composite light-emitting fibers preparation. In the invention, the quantum dot (QDs) material is connected with the bromine bond azopyridine derivative through the interaction of the hydrogen bond and the bromine bond to prepare the organic-inorganic composite light-emitting fiber. The main innovation of the present invention lies in the high-efficiency fluorescence of core-shell CdSe / ZnS quantum dots, the optical activity of azopyridine compounds and their potential application value. The bromine-bonded azopyridine compounds are combined with The combination of oleic acid-modified CdSe / ZnS quantum dots can not only prepare organic-inorganic light-emitting fibers, but also retain their liquid crystal properties, which provides a new perspective for designing functional self-assembled materials.
Description
technical field [0001] The invention relates to a bromine bond azopyridine / quantum dot light-emitting fiber assembled by hydrogen bond / bromine bond synergy and a preparation method thereof, which is the functionalization of organic-inorganic composite materials, and belongs to the technical field of fluorescent material application. Background technique [0002] A luminescent fiber (luminescent fiber, luminous fiber) refers to a fiber that can emit visible light with a wavelength longer than that of the irradiated light when irradiated by light and radiation. [0003] At present, there are mainly filling methods and composite methods for preparing luminescent fibers. According to the different luminescent materials used, it can be divided into the following types. (1) Liquid luminescent fiber: First, a low-refractive-index glass tube is drawn into a hollow fiber, and then a high-refractive-index liquid luminescent material is filled in the hollow part of the glass fiber to m...
Claims
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IPC IPC(8): D01F9/08D01F1/10C09K11/02
CPCD01F9/08D01F1/10C09K11/025
Inventor 陈寅杰薛露露潘莹张绍海李路海孙志成莫黎昕方一
Owner BEIJING INSTITUTE OF GRAPHIC COMMUNICATION