Fluorescent compound for viscosity detection of alcoholic beverages and its preparation and application
A technology for fluorescent compounds and alcohol, applied in the field of food safety monitoring, can solve the problems of unsuitability for mass preparation, unfavorable fluorescence release, limited final yield, etc., and achieves good photostability and chemical structure stability, anti-interference. Good, easy post-processing results
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Embodiment 1
[0043] A preparation method of a fluorescent compound for viscosity detection of alcoholic beverages, comprising the following steps:
[0044] (1) Dissolve 349 mg of 4'-(diphenylamino)-[1,1'-biphenyl]-4-carbaldehyde in ethanol, stir uniformly with ultrasonic, control 4'-(diphenylamino)-[1 , The concentration of 1'-biphenyl]-4-carbaldehyde is 1 M to obtain solution 1;
[0045] (2) Dissolve 123 mg of 4-methoxyaniline in ethanol, stir uniformly with ultrasonic, and control the concentration of 4-methoxyaniline to be 1 M to obtain solution 2;
[0046] (3) Mix solution 1 and solution 2, stir evenly, heat to 25 °C for 48 h, then remove the reaction solvent, wash with ethanol continuously and let stand for 2-3 times, and vacuum dry to obtain dark yellow powder (354.28 mg, yield 78%), the fluorescent compound (MIMDBA) was obtained.
[0047] The product was characterized by H NMR spectroscopy, 1 H NMR (400 MHz, CDCl 3 ) δ 8.53 (s,1H), 7.98 (d, J = 7.3 Hz, 2H), 7.70 (d, J = 8.3 ...
Embodiment 2
[0049] A preparation method of a fluorescent compound for viscosity detection of alcoholic beverages, comprising the following steps:
[0050] (1) Dissolve 349 mg of 4'-(diphenylamino)-[1,1'-biphenyl]-4-carbaldehyde in ethanol, stir uniformly with ultrasonic, control 4'-(diphenylamino)-[1 ,1'-biphenyl]-4-carbaldehyde with a concentration of 5 M to obtain solution 1;
[0051] (2) Dissolve 1230 mg of 4-methoxyaniline in ethanol, stir uniformly with ultrasonic, and control the concentration of 4-methoxyaniline to be 50 M to obtain solution 2;
[0052] (3) Mix solution 1 and solution 2, stir evenly, heat to 50 °C for reaction for 24 h, then remove the reaction solvent, wash with ethanol continuously and let stand for 2-3 times, and vacuum dry to obtain dark yellow powder (376.99 mg, the yield was 83%), the fluorescent compound (MIMDBA) was obtained.
[0053] The characterization results of the fluorescent compound MIMDBA obtained in this example are the same as those in Example ...
Embodiment 3
[0055] A preparation method of a fluorescent compound for viscosity detection of alcoholic beverages, comprising the following steps:
[0056] (1) Dissolve 349 mg of 4'-(diphenylamino)-[1,1'-biphenyl]-4-carbaldehyde in ethanol, stir uniformly with ultrasonic, control 4'-(diphenylamino)-[1 ,1'-biphenyl]-4-carbaldehyde with a concentration of 10 M to obtain solution 1;
[0057] (2) Dissolve 2460 mg of 4-methoxyaniline in ethanol, stir evenly with ultrasonic, and control the concentration of 4-methoxyaniline to be 100 M to obtain solution 2;
[0058] (3) Mix solution 1 and solution 2, stir evenly, heat to 78 °C and react for 1 h, then remove the reaction solvent, wash with ethanol continuously and let stand for 2-3 times, and vacuum dry to obtain dark yellow powder (404.25 mg, the yield was 89%), the fluorescent compound (MIMDBA) was obtained.
[0059] The characterization results of the fluorescent compound MIMDBA obtained in this example are the same as those in Example 1. Pl...
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