A kind of bisacylhydrazone compound and its synthesis and application of UV-fluorescence double pass to recognize cyanide ion in aqueous system

A technology of bisacylhydrazones and cyanide ions, which is applied in the fields of anion detection and chemical synthesis, and achieves the effects of wide application prospects, low cost and simple synthesis process

Inactive Publication Date: 2017-03-22
NORTHWEST NORMAL UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, many identification processes are still carried out in organic solvents, and it is really possible to identify CN in aqueous solution. - not many receptors

Method used

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  • A kind of bisacylhydrazone compound and its synthesis and application of UV-fluorescence double pass to recognize cyanide ion in aqueous system
  • A kind of bisacylhydrazone compound and its synthesis and application of UV-fluorescence double pass to recognize cyanide ion in aqueous system
  • A kind of bisacylhydrazone compound and its synthesis and application of UV-fluorescence double pass to recognize cyanide ion in aqueous system

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Embodiment Construction

[0037] Synthesis and detection CN of bisacylhydrazone compound LY of the present invention below by specific examples - application is further explained.

[0038] 1. Synthesis and characterization of LY

[0039] Weigh 2 mmol of isophthalic hydrazide and 4.4 mmol of 2-hydroxy-1-naphthaldehyde into a 100 mL round bottom flask, add 50 mL of EtOH, 1 mL of glacial acetic acid, and heat to reflux on an oil bath at 80°C for 8 hours. After the reaction was stopped, it was cooled to room temperature, and a pale yellow-green precipitate was precipitated. It was filtered and washed three times with hot ethanol solution, and then recrystallized with EtOH to obtain 0.76 g of a needle-shaped product.

[0040] Yield: 76%; (m.p. > 300 ℃), 1 H-NMR (DMSO-d 6 , 400 MHz), δ 12.76 (s 2H,OH), δ 12.43 (s 2H, -HN), δ 9.56 (s 2H, -CH=N), δ 8.66 (s 1H, ArH), δ 8.27 (m4H, ArH), δ 7.94-7.83 (m 5H, ArH), δ 7.63 (m 2H, ArH), δ 7.43 (t 2H, ArH), δ7.27(d 2H, ArH). 13 C NMR (DMSO-d 6 , 100 MHz): δ 161.8...

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Abstract

The present invention discloses a diacylhydrazone compound capable of performing ultraviolet-fluorescent double-pass recognition of cyanide ions and synthesis thereof, and belongs to the technical field of chemical synthesis and anion detection. The diacylhydrazone compound is obtained by reflux reaction of ethanol as a solvent, acetic acid as a catalyst, and isophthaloyl hydrazine and 2-hydroxy-1-naphthaldehyde as substrates. Experimental results show that in a water-containing system of the diacylhydrazone compound, the solution changes from colorless to light yellow only by addition of CN<->; under ultraviolet lamp irradiation, fluorescence of the compound solution can open only by addition of the CN<->, so that the compound is capable of easily and quickly performing high sensitivity high selectivity colorimetric fluorescent double-pass recognition of the CN<-> in the aqueous solution, the synthesis process is simple, cost is low, and the diacylhydrazone compound as a simple and effective diacylhydrazone recognition receptor has broad application prospects.

Description

technical field [0001] The invention relates to a bisacylhydrazone compound capable of recognizing cyanide ions by ultraviolet-fluorescence double pass and its synthesis; the invention also relates to the application of the compound to detect cyanide ions in an aqueous system, which belongs to the field of chemical synthesis and anion detection technology field. Background technique [0002] In industrial production, cyanide (containing cyanide ion CN - Inorganic salts) are widely used in gold mining, electroplating, metallurgy, etc., and play a very important role. A large amount of cyanide-containing wastewater can be produced in industrial production, and cyanide can be infiltrated through the respiratory tract, esophagus and skin to cause poisoning. Mild cases have symptoms of mucosal irritation, numbness of the lips and tongue, asthma, nausea, vomiting, and palpitations. In severe cases, breathing is irregular, consciousness gradually becomes comatose, and breathing ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C251/86C07C249/16C09K11/06G01N21/78G01N21/64
Inventor 魏太保严国涛张有明林奇姚虹
Owner NORTHWEST NORMAL UNIVERSITY
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