Method for detecting ferric ions through triphenylamine dye

A technology of triphenylamine and ferric iron, applied in the direction of material excitation analysis, fluorescence/phosphorescence, etc., can solve the problems of non-continuous detection, high detection cost, large sample consumption, etc., achieve low detection limit, low detection cost, high Effects of Selectivity and Sensitivity

Active Publication Date: 2016-02-17
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to solve the problems of high detection cost, complex operation, large amount of samples and inability to detect continuously in the prior art, and provide a detection limit up to ppm level, response within 1min, interference by other cations, detection cost Low-cost and simple operation, used in aqueous solution system, high selectivity and sensitivity of the application of triphenylamine dyes to detect ferric ions

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  • Method for detecting ferric ions through triphenylamine dye
  • Method for detecting ferric ions through triphenylamine dye
  • Method for detecting ferric ions through triphenylamine dye

Examples

Experimental program
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Embodiment 1

[0028] 1. Preparation of triphenylamine dyes

[0029] In a 100mL flask, add 1.3655g (5mmol) 4-(diphenylamine) benzaldehyde, 0.6608g (10mmol) malononitrile and an appropriate amount of triethylamine, and then add 50mL of absolute ethanol. After reacting at room temperature for 24 hours, the solvent was distilled off under reduced pressure, and the residual solid was purified with a silica gel column under the condition that the eluent composition was ethyl acetate:n-hexane=1:8 (v / v) to obtain 1.2521 g of a yellow solid. Yield 78%.

[0030] 2. Compound Characterization

[0031] 1 HNMR (400MHz, DMSO-d 6 )δ (ppm): 8.20 (s, 1H), 7.82 (d, J = 8.5Hz, 2H), 7.44 (t, J = 7.5Hz, 4H), 7.26 (dd, J = 19.7, 7.4Hz, 6H) ,6.83(d,J=8.5Hz,2H).

[0032] 13 CNMR (100MHz, DMSO-d 6 )δ (ppm): 159.30, 152.89, 144.70, 133.07, 130.13, 126.77, 126.24, 122.58, 117.41, 115.37, 114.42, 73.73;

[0033] IR(v -1 ,KBr):3057,2216,1610,1590,1568,1506,1440,1349,1317,1241,1189,830,763,697,524.

[0034] HR-MS...

Embodiment 2

[0039] Detection of Ferric Ion with Triphenylamine Dye

[0040] (1) Prepare a triphenylamine dye DMSO solution with a concentration of 10 mM, take 2 parts of 10 μL triphenylamine dye DMSO solution respectively, add distilled water to dilute to 10 mL respectively, and obtain 2 parts of triphenylamine dye aqueous solution;

[0041] (2) preparation concentration is the ferric chloride aqueous solution of 10mM, and concentration is the ferrous chloride aqueous solution of 60mM;

[0042] (3) In 2 parts of 10mL triphenylamine dye aqueous solution, add dropwise respectively 0.1mL of ferric chloride aqueous solution and ferrous chloride aqueous solution prepared in step (2), after mixing evenly, observe triphenylamines under 365nm light excitation Fluorescence changes in aqueous dye solutions.

[0043] The results showed that after adding the ferric chloride aqueous solution, the fluorescence of the triphenylamine dye aqueous solution was quenched, while adding ferrous chloride, the ...

Embodiment 3

[0045] Detection of Ferric Ion with Triphenylamine Dye

[0046] (1) Prepare a triphenylamine dye THF solution with a concentration of 20 mM, take 2 parts of 10 μL triphenylamine dye THF solution respectively, add distilled water to dilute to 10 mL respectively, and obtain 2 parts of triphenylamine dye aqueous solution;

[0047] (2) preparation concentration is the ferric chloride aqueous solution of 15mM, and concentration is the copper sulfate aqueous solution of 60mM;

[0048] (3) In 2 parts of 10mL triphenylamine dye aqueous solution, add dropwise respectively 0.1mL of ferric chloride aqueous solution and copper sulfate aqueous solution prepared in step (2), after mixing evenly, observe the triphenylamine dye aqueous solution under 365nm light excitation changes in fluorescence.

[0049] The results showed that the fluorescence of the triphenylamine dye aqueous solution was quenched after adding the ferric chloride aqueous solution, and the fluorescence of the triphenylami...

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Abstract

The invention discloses a method for detecting ferric ions through triphenylamine dye. The method comprises steps as follows: (1), the triphenylamine dye is dissolved in a hydrophile organic solvent, a triphenylamine dye stock solution is prepared and diluted with water, and a triphenylamine dye containing water solution is prepared; (2), a to-be-detected sample is added dropwise, whether fluorescence of the water solution is quenched or not is observed under excitation of light with a wavelength of 365 nm, if the fluorescence of the solution is quenched, the sample contains the ferric ions, cyanide ions or sulfite ions, nuclear magnetic resonance hydrogen spectroscopy is used for aiding in distinguishing, and whether the sample contains the ferric ions can be determined. The method has high selectivity and sensitivity and is basically not interfered by other cations; the detection limit is low and can reach a ppb level; response is quick and is made in 1 min; the method has the advantages of low detection cost, simple operation and the like.

Description

technical field [0001] The invention relates to an application of triphenylamine, in particular to a method for detecting ferric ions using triphenylamine dyes. Background technique [0002] Iron is the most abundant trace element in the human body and participates in various important physiological activities of the organism, such as oxygen transport in the blood, proton transfer, synthesis of DNA and RNA, etc. It is an important part of hemoglobin and various enzymes. Once it is deficient in the body, it will induce various physiological system disorders and cause diseases; and if the content is too high, there are also potential hazards. Excessive levels affect a variety of diseases such as heart and liver disease, diabetes, and certain tumors. [0003] At present, the detection methods of ferric ions include atomic absorption spectrophotometry, flame photometry, electron probe microanalysis and ion selective electrode method, etc., but these detection methods generally ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/64
Inventor 瞿金清杨小东刘瑞源
Owner SOUTH CHINA UNIV OF TECH
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