Hydrogen bond/bromine bond synergistically assembled bromine bond azopyridine/quantum dot luminescent fiber and preparation method thereof
A bromine-bonded azopyridine and quantum dot luminescence technology, which is applied in the functionalization of organic-inorganic composite materials, bromine-bonded azopyridine/quantum dot luminescent fiber and its preparation, can solve the problems of poor photochemical stability, narrow ultraviolet absorption spectrum, Fluorescence emission wavelength can not be adjusted to achieve the effect of improving quantum yield and good luminescence performance
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[0048] (1) Preparation of bromine-bonded azopyridine / quantum dot light-emitting fibers assembled by hydrogen bond / bromine bond
[0049] 1. Synthesis of intermediate 4-hydroxyazopyridine
[0050] Its preparation process is as follows:
[0051]
[0052] 1), 4.00g (58mmol) of sodium nitrite and 5.00g (53mmol) of phenol were placed in 10% (w / w) aqueous sodium hydroxide solution (20mL), and cooled to 0°C to obtain a mixed solution;
[0053] 2), the above mixed solution was added dropwise to 45 mL of hydrochloric acid solution (25 mL of 11N hydrochloric acid and 20 mL of water) containing 6.00 g (64 mmol) of 4-aminopyridine, and stirred for 0.5 h under ice bath to obtain a reaction mixture;
[0054] 3), using 10% (w / w) aqueous sodium hydroxide solution, the pH value of the reaction mixture obtained in step 2) was adjusted to 6-7, filtered to obtain a yellow precipitate, washed with water, recrystallized, and dried to obtain a yellow solid 4 -Hydroxyazopyridine; Yield: 38.0%;
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