Application of copolymerization pillar [5] arene to hexadecylpyridinium chloride colorimetric detection in CHC13 system
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A technology for cetylpyridinium chloride and aromatics, which is applied to the detection of surfactant cetylpyridinium chloride, and uses a copolymerized column of 5 aromatics to detect cetylpyridine chloride, which can solve the problem of long detection time, Problems such as unclear detection
Inactive Publication Date: 2015-12-09
NORTHWEST NORMAL UNIVERSITY
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These detection methods require a long detection time, the detection is not obvious, or it needs to be detected by more complicated instruments.
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Embodiment 1
[0033] Example 1. Synthesis of copolymerized pillar 5 aromatics (compound DCP5-16)
[0034] 1. Synthesis of intermediates: hydroquinone (4.4g, 40mmol), sodium hydroxide (10g, 4mmol), potassium iodide (4g, 24mmol), hexadecane bromide (26.8g, 88mmol) and ethanol (300.0 mL) into a 500mL round-bottomed flask, stirred and reacted for 3 days (72h), the solid precipitated out to obtain an intermediate. 1 HNMR (400MHz, CDCl 3,298K)δ(ppm):6.82(d,4H),3.96(t,4H),1.75(t,4H),1.43(t,4H),1.26(t,48H),0.86(s,6H). . The yield was 80%.
[0035] 2. Synthesis of aromatics in copolymerization column 5: intermediate (2.79g, 5mmol), p-xylylene dimethyl ether (2.76g, 20mmol) were added to 80mL1,2-dichloroethane for dissolution; then paraformaldehyde (0.75 g, 25mmol), boron trifluoride diethyl ether (3.2mL, 25mmol) were added to the solution, and the reaction was stirred at room temperature for 8h. After the reaction, pour the solution into methanol to precipitate precipitates, filter, dissolve th...
Embodiment 2
[0039] Example 2: Recognition of Surfactant Cetylpyridinium Chloride by Copolymerizing Pillar 5 Aromatics (DCP5-16)
[0040] DCP5-16 was treated with CHCl 3 dubbed into 2×10 -3 mol / L main body solution; respectively take 0.5mL main body solution in 7 colorimetric tubes. Prepare 0.5 mL of different surfactants (cetylpyridinium chloride, cetylpyridinium bromide, cetyltrimethylamine bromide, trimethylamine ethanol solution, triethanolamine, dodecylbenzenesulfonic acid Sodium) in chloroform (concentration: 0.01 mol / L) was used as the guest solution. Add the above-mentioned guest solution to the 7 colorimetric tubes, if the fluorescence of the main solution is quenched, it means that the added guest solution is cetylpyridinium chloride; if the fluorescence of the main solution does not change, it means that the guest solution is not chlorinated cetylpyridine.
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Abstract
The invention discloses an application of copolymerization pillar [5] arene to hexadecylpyridinium chloride colorimetric detection in a CHCl3 system, and belongs to the technical field of compound detection. The application is specifically characterized in that the copolymerization pillar [5] arene is prepared into a main solution through CHCl3; a CHCl3 solution of the hexadecylpyridinium chloride serving as surfactants, a CHCl3 solution of hexadecylpyridinium bromide serving as surfactants, a CHCl3 solution of hexadecyl trimethyl ammonium bromide serving as surfactants, a CHCl3 solution of a trimethylamine ethanol solution serving as surfactants, a CHCl3 solution of triethanolamine serving as surfactants and a CHCl3 solution of sodium dodecyl benzene sulfonate are respectively prepared to serve as auxiliary solutions; the auxiliary solutions are added into the body solution, and if fluorescence of the body solution is quenched, it is indicated that the added auxiliary solution of the CHCl3 solution of the hexadecylpyridinium chloride; if the fluorescence of the body solution is not changed, it is indicated that the auxiliary solution is not the CHCl3 solution of the hexadecylpyridinium chloride. The method for monitoring the hexadecylpyridinium chloride has the advantages of being rapid, high in sensitivity and the like, and a new direction is developed for single selectivity detection of surfactants.
Description
technical field [0001] The invention relates to a method for detecting cetylpyridinium chloride, a surfactant, in particular to a method for detecting cetylpyridinium chloride by using copolymerized column 5 aromatics, and belongs to the technical field of compound detection. Background technique [0002] Surfactants have a series of physical and chemical effects such as wetting or anti-adhesive, emulsification or demulsification, foaming or defoaming, solubilization, dispersion, washing, anti-corrosion, anti-static and corresponding practical applications, and become a flexible and diverse class. , Wide range of fine chemical products. In addition to being used as detergents in daily life, surfactants can be used in almost all fine chemical fields. Cetylpyridinium chloride is a cationic quaternary ammonium compound, and it is also a very important surface active and fungicide in life. Under the same use conditions, the killing rate of this product is better than that of d...
Claims
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