Synthesis and use of novelthorium color developing reagent metafluoro azo fluorophosphine

The technology of a color developer and fluoroazo is applied in the field of thorium color developer m-fluoroazo-fluorophosphine, 2--7--1-8-dihydroxy-3, which can solve the problem that it cannot be popularized and the performance of the reagent needs to be further improved. It can improve the selectivity, improve the complexation reaction performance, and shorten the reaction time.

Inactive Publication Date: 2005-06-15
EAST CHINA NORMAL UNIV
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Problems solved by technology

Determination of harmful element thorium (IV) by atomic absorption method is not popular because of expensive instruments
Color-changing acid chromogenic reagents have high sensitivity and selectivity and are used in photometric analysis, but the reagent performance needs to be further improved

Method used

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  • Synthesis and use of novelthorium color developing reagent metafluoro azo fluorophosphine
  • Synthesis and use of novelthorium color developing reagent metafluoro azo fluorophosphine
  • Synthesis and use of novelthorium color developing reagent metafluoro azo fluorophosphine

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Embodiment Construction

[0035] The synthesis method involved in the invention is particularly suitable for the synthesis of thorium chromogen m-fluoroazofluorophosphine, and the product of the synthesis method is suitable for photometric analysis of harmful element thorium (IV).

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Abstract

The invention relates to a new thorium chromogenic agent m-fluoroazophosphine and its synthesis and application, belonging to the technical field of organic reagent synthesis and application. The synthesis method adopts nitration hydrolysis, direct reduction phosphonation, diazotization coupling and other reactions to obtain the crude m-fluoroazofluorophosphine, which is purified by acidification and developed with 25% ammonia water: 5% sodium citrate=2:5. The pure product is obtained by paper chromatography, and has the advantages of short reaction time, complete reaction and simple synthesis process. In the photometric analysis and determination of thorium (IV) by the chromogenic agent, the surfactant hexadecylpyridine bromide is introduced, and the system has a significant sensitization effect after being purified by n-butanol, and has high sensitivity and selectivity , and has certain application value in the analysis fields such as environment and food.

Description

technical field [0001] The present invention relates to a new thorium chromogen m-fluoroazofluorophosphine, specifically, to 2-(5-fluoro-2-phosphonophenylazo)-7-(3-fluorophenylazo)- The synthesis and application of 1-8-dihydroxy-3,6-naphthalene disulfonic acid belong to the technical field of organic reagent synthesis and application. Background technique [0002] Meta-fluoroazofluorophosphine belongs to fluorine-containing color-changing acid color developer, and the synthesis and application of fluorine-containing color-changing acid color developer has attracted increasing attention. The current report has "Research on the Color Reaction Performance of Asymmetric Chromotropic Acid Disazo Reagents Containing Fluorine Substituents and Metal Ions" [Luo Qingyao, Yu Ximao, Zeng Yunhe, Chemical Reagents, 1993, 15(5): 262-267]. The involved synthetic reagent is based on the chlorophosphine azo I, introducing fluorine-containing multi-halogen substituents o...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07F9/38
Inventor 吴斌才王冰
Owner EAST CHINA NORMAL UNIV
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