A fluorescent sensor for detection of gelation degree of pickering emulsion and its preparation and application
A fluorescent sensor and emulsion gel technology, applied in the field of fluorescent sensors, to achieve the effects of good photostability, convenient operation, and not easy to decompose or oxidize
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Embodiment 1
[0047] A preparation method for a fluorescent sensor for Pickering emulsion gelation degree detection, comprising the steps:
[0048] (1) Dissolve 370 mg of 4-(4-bromo-2,6-dimethoxystyrene)-1-ethylquinoline-1-salt in ethanol, stir evenly with ultrasonic, control 4-(4 -Bromo-2,6-dimethoxystyrene)-1-ethylquinoline-1-salt at a concentration of 1 M to obtain solution 1;
[0049] (2) Dissolve 340 mg of (4-bromophenyl)diphenylphosphine in acetonitrile, stir evenly with ultrasonic, control the concentration of (4-bromophenyl)diphenylphosphine to 1 M, and obtain solution 2;
[0050] (3) Mix solution 1 and solution 2, and add 100 mg of calcium carbonate to it, then fill the reaction system with nitrogen, heat the reaction to 81°C, and add 254 mg of pinacol diborate dropwise, After that, 2.25 mg of palladium acetate was added dropwise, and the reaction was stirred for 36 h. After the reaction was completed, the organic solvent was removed, and the crude product was extracted in a separ...
Embodiment 2
[0055] A preparation method for a fluorescent sensor for Pickering emulsion gelation degree detection, comprising the steps:
[0056] (1) Dissolve 370 mg of 4-(4-bromo-2,6-dimethoxystyrene)-1-ethylquinoline-1-salt in ethanol, stir evenly with ultrasonic, control 4-(4 -Bromo-2,6-dimethoxystyrene)-1-ethylquinoline-1-salt at a concentration of 10 M to obtain solution 1;
[0057] (2) Dissolve 850 mg of (4-bromophenyl)diphenylphosphine in acetonitrile, stir evenly, and control the concentration of (4-bromophenyl)diphenylphosphine to 20 M to obtain solution 2;
[0058] (3) Mix solution 1 and solution 2, and add 1000 mg of calcium carbonate to it, then fill the reaction system with nitrogen, heat the reaction to 50°C, and add 635 mg of pinacol diborate dropwise , and then dropwise added 11.25 mg of palladium acetate, and stirred for 18 h. After the reaction was completed, the organic solvent was removed, and the crude product was extracted in a separatory funnel by dichloromethane / w...
Embodiment 3
[0061] A preparation method for a fluorescent sensor for Pickering emulsion gelation degree detection, comprising the steps:
[0062] (1) Dissolve 370 mg of 4-(4-bromo-2,6-dimethoxystyrene)-1-ethylquinoline-1-salt in ethanol, stir evenly with ultrasonic, control 4-(4 -Bromo-2,6-dimethoxystyrene)-1-ethylquinoline-1-salt at a concentration of 20 M to obtain solution 1;
[0063] (2) Dissolve 1700 mg of (4-bromophenyl)diphenylphosphine in acetonitrile, stir evenly with ultrasonic, control the concentration of (4-bromophenyl)diphenylphosphine to 40 M, and obtain solution 2;
[0064] (3) Mix solution 1 and solution 2, and add 2000 mg of calcium carbonate to it, then fill the reaction system with nitrogen, heat the reaction to 20°C, and add 1250 mg of pinacol diborate dropwise , and then dropwise added 22.50 mg of palladium acetate, stirred for 1 h, after the reaction was finished, after removing the organic solvent, the crude product was extracted in a separating funnel through a d...
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