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Schiff base compound capable of efficiently and individually selecting and recognizing fluorine ions as well as synthesis and application of Schiff base compound

A Schiff base and fluoride ion technology, applied in the field of anion detection and chemical synthesis, can solve the problems of Schiff base compound detection, identification of less anions, etc., and achieve the effect of good application value

Inactive Publication Date: 2015-12-23
NORTHWEST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are few studies on the detection and identification of anions by Schiff base compounds.

Method used

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  • Schiff base compound capable of efficiently and individually selecting and recognizing fluorine ions as well as synthesis and application of Schiff base compound
  • Schiff base compound capable of efficiently and individually selecting and recognizing fluorine ions as well as synthesis and application of Schiff base compound
  • Schiff base compound capable of efficiently and individually selecting and recognizing fluorine ions as well as synthesis and application of Schiff base compound

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0035] 1. Synthesis and characterization of compound TY

[0036] Put 0.276g (1.5mmol) of p-benzidine and 0.688g (4mmol) of 2-hydroxyl-1-naphthaldehyde in a 100mL round bottom flask, add 50mL of ethanol as a solvent, and 1mL of glacial acetic acid as a catalyst. After stirring at room temperature for 30min, Heated to reflux on an oil bath at 80°C for 4h. After the reaction was stopped and cooled to room temperature, it was filtered with suction. At the same time, it was washed three to five times with hot ethanol solution, and then recrystallized with DMF / EtOH to obtain 0.559 g of red needle-like crystals. Its synthetic formula is as follows:

[0037]

[0038] TY: Yield: 76.3%; (m.p.>300℃). 1 HNMR (DMSO-d 6 ,400MHz):δ15.87(d,2H,Ar-OH),9.72(d,2H,N=CH),8.52(d,2H,ArH),7.93-7.88(m,6H,ArH),7.78( t,6H,ArH),7.55(t,2H,ArH),7.35(t,2H,ArH),7.01(d,2H,ArH).IR(KBr,cm -1 ):v:=3431(OH),1624(C=N),1535(C=C),1487(C=C).Anal.Calcd.forC 34 h 24 N 2 o 2 : C, 82.89; H, 4.91; N, 5.69; O...

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Abstract

The invention synthesizes a schiff base compound capable of efficiently selecting and recognizing fluorine ions. The schiff base compound is prepared through a reflux reaction of ethanol serving as a solvent, glacial acetic acid serving as a catalyst as well as benzidine and 2-hydroxyl-1-naphthaldehyde serving as substrates. Stimulating response of a receptor and negative ions in a dimethylsulfoxide solution is recognized and inspected through ultraviolet-visible absorption spectrums and fluorescence spectrums, the color of the solution can be changed from yellow to orange only when F<-> is added, green fluorescence of a main solution is quenched, and the effect of F<-> recognition is realized through two ways of naked eyes and fluorescence. A titration experiment proves that LOD (limit of detection) of the schiff base compound to the fluorine ions reaches 2.7*10<-7> mol / L, thus, the detection sensitivity to F<-> is very high, and the schiff base compound serving as a sensor receptor can rapidly and efficiently detect F<-> in the solution and has good application value.

Description

technical field [0001] The present invention relates to a Schiff base compound, in particular to a symmetrical double-sided Schiff base compound capable of highly efficient and single selective recognition of fluoride ions and a synthesis method thereof; The invention discloses a specific application in identifying fluorine ions, and belongs to the field of chemical synthesis and the technical field of anion detection. Background technique [0002] As the most electronegative atom, fluoride ion has a high charge density and plays an important role in the environment, medicine and chemical processes. Fluorine is an essential trace element in human life activities, and also a basic component of teeth and bones. An appropriate amount of fluorine is beneficial to the absorption of calcium and phosphorus, which can be used to accelerate the formation of bones and make teeth stronger. However, excessive fluoride is harmful to the body, causing diseases such as dental fluorosis, ...

Claims

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Application Information

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IPC IPC(8): C07C251/24C07C249/02C09K11/06G01N21/64
Inventor 魏太保严国涛张有明林奇姚虹
Owner NORTHWEST NORMAL UNIVERSITY
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