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Method for identifying 2-hydroxyl-1,4-naphthoquinone and 5-Hydroxy-1,4-naphthalenedione as isomer of 2-hydroxyl-1,4-naphthoquinone

A kind of technology of isomer and naphthoquinone, applied in the field of differentiation and identification

Active Publication Date: 2018-08-24
ANHUI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is of great significance to the research and development of 2-hydroxy-1,4-naphthoquinone and 5-hydroxy-p-naphthoquinone and the quality control in the production process, while for 2-hydroxy-1,4-naphthoquinone and 5-hydroxy-p-naphthoquinone There are few reports on the methods of distinguishing between naphthoquinones

Method used

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  • Method for identifying 2-hydroxyl-1,4-naphthoquinone and 5-Hydroxy-1,4-naphthalenedione as isomer of 2-hydroxyl-1,4-naphthoquinone
  • Method for identifying 2-hydroxyl-1,4-naphthoquinone and 5-Hydroxy-1,4-naphthalenedione as isomer of 2-hydroxyl-1,4-naphthoquinone
  • Method for identifying 2-hydroxyl-1,4-naphthoquinone and 5-Hydroxy-1,4-naphthalenedione as isomer of 2-hydroxyl-1,4-naphthoquinone

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Experimental program
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Effect test

Embodiment 1

[0052] This embodiment verifies the feasibility of the identification method of 2-hydroxy-1,4-naphthoquinone and its isomer 5-hydroxy-naphthoquinone of the present invention according to the following steps:

[0053] (1) Preparation solution

[0054] First prepare the sulfuric acid solution of 0.025mol / L with 98% concentrated sulfuric acid as a solvent; then use the sulfuric acid solvent of 0.025mol / L to prepare respectively the potassium iodate solution of 0.14mol / L, the malonic acid solution of 2.0mol / L, and the 4.0 mol / L hydrogen peroxide solution and 0.0173mol / L [NiL](ClO 4 ) 2 solution. Then, add 14.7ml, 0.025mol / L sulfuric acid solution successively to the open system of 50ml beaker; 6ml, 0.14mol / L potassium iodate solution; 2ml, 0.0173mol / L catalyst; 3.3ml, 2.0mol / L malonic acid solution; 14ml, 4.0mol / L hydrogen peroxide solution. Use the above solution as an identification solution. Finally, the concentration of sulfuric acid in the identification solution (oscill...

Embodiment 2

[0064] This embodiment verifies the feasibility of the identification method of 2-hydroxy-1,4-naphthoquinone and its isomer 5-hydroxy-naphthoquinone of the present invention according to the following steps:

[0065] (1) Preparation solution

[0066] First prepare the sulfuric acid solution of 0.025mol / L with 98% concentrated sulfuric acid as a solvent; then use the sulfuric acid solvent of 0.025mol / L to prepare respectively the potassium iodate solution of 0.14mol / L, the malonic acid solution of 2.0mol / L, and the 4.0 mol / L hydrogen peroxide solution and 0.0173mol / L [NiL](ClO 4 ) 2 solution. Then, add 14ml, 0.025mol / L sulfuric acid solution successively to the open system of 50ml beaker; 0.5ml distilled water; 6.5ml, the potassium iodate solution of 0.14mol / L; 2.0mol / L malonic acid solution; 14.5ml, 4.0mol / L hydrogen peroxide solution. Use the above solution as an identification solution. Finally, the concentration of sulfuric acid in the identification solution (oscillat...

Embodiment 3

[0076] This embodiment verifies the feasibility of the identification method of 2-hydroxy-1,4-naphthoquinone and its isomer 5-hydroxy-naphthoquinone of the present invention according to the following steps:

[0077] (1) Preparation solution

[0078] First prepare the sulfuric acid solution of 0.025mol / L with 98% concentrated sulfuric acid as a solvent; then use the sulfuric acid solvent of 0.025mol / L to prepare respectively the potassium iodate solution of 0.14mol / L, the malonic acid solution of 2.0mol / L, and the 4.0 mol / L hydrogen peroxide solution and 0.0173mol / L [NiL](ClO 4 ) 2 solution. Then, add 15ml, 0.025mol / L sulfuric acid solution to the open system of 50ml beaker; 6ml, 0.14mol / L potassium iodate solution; 2ml, 0.0173mol / L catalyst; 3.5ml, 2.0mol / L Malonic acid solution; 13.5ml, 4.0mol / L hydrogen peroxide solution. Use the above solution as an identification solution. Finally, the concentration of sulfuric acid in the identification solution (oscillating system)...

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Abstract

The invention discloses a method for identifying 2-hydroxyl-1,4-naphthoquinone and 5-Hydroxy-1,4-naphthalenedione as an isomer of the 2-hydroxyl-1,4-naphthoquinone. The method is characterized in thatH2SO4-KIO3-[NiL](ClO4)2-malonic acid-H2O2 as a non-linear chemical oscillation system is applied as an identification solution, identification of the 2-hydroxyl-1,4-naphthoquinone and the 5-Hydroxy-1,4-naphthalenedione as the isomer of the 2-hydroxyl-1,4-naphthoquinone is realized according to different potential lowering degrees to the identification solution caused by the 2-hydroxyl-1,4-naphthoquinone and the 5-Hydroxy-1,4-naphthalenedione as the isomer of the 2-hydroxyl-1,4-naphthoquinone, wherein L in [NiL](ClO4)2 is 5,7,7,12,14,14-hexamethyl-1,4,8,11-tetraazacyclotetradeca-4,11-diene. Byadopting the identifying method provided by the invention, an oscillation map has the intuitiveness, the 2-hydroxyl-1,4-naphthoquinone and the 5-Hydroxy-1,4-naphthalenedione as the isomer of the 2-hydroxyl-1,4-naphthoquinone can be conveniently and rapidly identified, equipment is simple, the accuracy is high, and operation and observation are easy.

Description

technical field [0001] The present invention relates to a kind of distinguishing and identifying method, specifically a kind of nickel complex [NiL](ClO 4 ) 2 The invention relates to a method for identifying 2-hydroxy-1,4-naphthoquinone and its isomer 5-hydroxy-naphthoquinone by a catalytic nonlinear chemical oscillation system, which belongs to the field of qualitative analysis chemistry. Background technique [0002] 2-Hydroxy-1,4-naphthoquinone and 5-hydroxy-p-naphthoquinone have the same molecular formula and belong to isomers of aromatic compounds. Their structures are shown in formula (1), and they are in their respective fields play a pivotal role. 2-Hydroxy-1,4-naphthoquinone is a dye that exists in plants. It is used abroad to formulate creams and lotions with 1,3-dihydroxyacetone. Because of its wide spectrum of UV protection, it has been used as a A highly effective chemical sunscreen for the treatment and prevention of linear dermatosis. In recent years, co...

Claims

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Application Information

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IPC IPC(8): G01N27/416
CPCG01N27/4161
Inventor 胡刚张慧周颖张望宁吴蓝胡林
Owner ANHUI UNIVERSITY