Acceptor organogel for colorimetrically identifying fluorine ions in single-selectivity manner as well as preparation and application of acceptor organogel

An organic gel and fluoride ion technology, applied in the field of anion detection, can solve problems such as difficult synthesis, complex structure, and inability to realize single selective recognition of specific ions, and achieve low cost and high selectivity

Inactive Publication Date: 2013-08-28
NORTHWEST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

At present, the supramolecular gel materials reported in the literature are often complex in structure and difficult to synthesize.
In addition, the ion-responsive supramolecular gel materials reported in the literature often respond to the stimulation of multiple ions, so it is impossible to achieve a single selective recognition of specific ions.
For example, the fluoride ion-responsive supramolecular gels reported by Zhang, Y. M.; Lin, Q.; Wei, T. B.; Qin, X. P.; Li, Y. The interference of basic anions such as acetate and dihydrogen phosphate cannot achieve a single selective recognition of fluoride ions

Method used

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  • Acceptor organogel for colorimetrically identifying fluorine ions in single-selectivity manner as well as preparation and application of acceptor organogel
  • Acceptor organogel for colorimetrically identifying fluorine ions in single-selectivity manner as well as preparation and application of acceptor organogel
  • Acceptor organogel for colorimetrically identifying fluorine ions in single-selectivity manner as well as preparation and application of acceptor organogel

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Experimental program
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Embodiment Construction

[0031] 1. Preparation of fluoride ion acceptor

[0032] (1) Preparation of intermediate 1-3,4-bis(hexadecyloxy)benzaldehyde

[0033] 5.0 mmol 3,4-dihydroxybenzaldehyde, 20.0 mmol anhydrous K 2 CO 3 , 1.0 mmol KI and 30 mL acetone were mixed and heated to reflux for 2h, then 1-bromo-n-hexadecane 10.0 mmol was slowly added dropwise, and refluxed for 48h. After the reaction was complete, evaporate the acetone to dryness, add CHCl 3 Extract 3 times, filter, wash the filtrate once with distilled water, wash 2 times with 2% NaOH solution, wash 3 times with saturated NaCl solution, and finally wash with anhydrous NaOH solution 2 SO 4 dry. Rotary evaporation to remove CHCl 3 The product 1-3,4-bis(hexadecyloxy)benzaldehyde (this method refers to Tatsuya Kitahara, Michihiro Shirakawa, Shin-ichiro Kawano, Uwe Beginn, Norifumi Fujita, Seiji Shinkai; J. A. C. S. 2005, 127, 14980. ).

[0034] (2) Preparation of fluoride ion acceptor

[0035] Add 5.0 mmol of 1-3,4-bis(hexadecyloxy)b...

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Abstract

The invention designs and synthesizes an acceptor 1-(3,4-bis(hexadecyloxy)benzylidene)2-(-4-nitrophenyl) hydrazon capable of colorimetrically identifying fluorine ions with high selectivity. The acceptor has a single-selectivity colorimetric identifying capacity to the fluorine ions in DMSO (dimethylsulfoxide) solution. The acceptor is heated and dissolved in DMSO or DMF (Dimethyl Formamide) to prepare solution with the mass concentration of 0.6-2.0%, and the solution is cooled to the room temperature to form the stable organogel, wherein the color of the organogel is changed from saffron to reddish brown when the organogel comes into contact with fluorine ion solution and is not changed when comes into contact with other ion solutions. Therefore, being an intelligent supermolecule gel material for identifying the fluorine ions with single selectivity, the acceptor can be used for colorimetrically identifying the fluorine ions with high selectivity conveniently and quickly at low cost.

Description

technical field [0001] The invention belongs to the technical field of anion detection, and relates to a fluoride ion acceptor organogel, in particular to a fluoride ion acceptor 1-(3,4-bis(hexadecyloxy)benzylidene) 2-( -Organogel of 4-nitrophenyl) hydrazone; the present invention also relates to the application of the fluoride ion acceptor organogel for colorimetric recognition of fluoride ions. Background technique [0002] Fluorine is one of the essential trace elements for the human body. Intake of trace amounts of fluorine can help prevent dental caries, but excessive intake will cause harm to the human body. Excessive intake of fluoride ions can lead to fluorosis. Mild fluorosis can harm the ameloblasts of human tooth germs. Severe fluorosis can cause fluoride-induced osteosclerosis, bone hardening, and bone hyperplasia. Joint mobility is limited, even hunched over, paralyzed, and completely incapacitated. Therefore, the qualitative and quantitative detection of fluo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C251/86C07C249/16G01N21/78
Inventor 林奇朱鑫符永鹏张有明魏太保
Owner NORTHWEST NORMAL UNIVERSITY
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