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Supramolecular polymer and application thereof in fluorescent recognition of hydroxide ions and carbon dioxide gas

A technology for supramolecular polymers and fluorescent recognition, applied in the field of supramolecular polymers

Inactive Publication Date: 2019-04-26
NORTHWEST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the fluorescence and colorimetric recognition of carbon dioxide by pillar arene derivatives under the regulation of anions has not been reported yet.

Method used

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  • Supramolecular polymer and application thereof in fluorescent recognition of hydroxide ions and carbon dioxide gas
  • Supramolecular polymer and application thereof in fluorescent recognition of hydroxide ions and carbon dioxide gas
  • Supramolecular polymer and application thereof in fluorescent recognition of hydroxide ions and carbon dioxide gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Embodiment 1, the synthesis of supramolecular polymer PNG

[0055] 1. Preparation of pillar arene derivative PN

[0056] Preparation of compound 1: under nitrogen protection, 4-methoxyphenol (2.48 g, 20.0 mmol), K 2 CO 3 (13.82 g, 100 mmol), KI (3.32 g, 20 mmol), 1,4-dibromobutane (17.12 g, 80 mmol) in acetone (400 mL) was refluxed for 48h. Filter after completion of the reaction, and the filtrate column chromatography (V 石油醚 / V 乙酸乙酯 = 50:1), to obtain white solid compound 1 (4.95 g, yield 96%);

[0057] Preparation of compound 2: Take compound 1 (1.29 g, 5 mmol), 1,4-dimethoxybenzene (8.29 g, 60 mmol), boron trifluoride ether (6 mL, 47.6 mmol) and paraformaldehyde ( 3.00 g, 100 mmol) was stirred in 1,2-dichloroethane (250 mL) at 30°C for 40 min. After the completion of the reaction, the mixed solution was washed with water and extracted 3 times with dichloromethane, the organic phases were combined, dried over anhydrous sodium sulfate, and column chromatography (...

Embodiment 2

[0063] Embodiment 2. Recognition OH of supramolecular polymer PNG -

[0064] Pipette 2 mL PNG in DMSO solution (C PN =2×10 -4 M) Add 5 times the equivalent of F to a series of colorimetric tubes - , Cl - , Br - , I - , AcO - , H 2 PO 4 - , HSO 4 - , ClO 4 - , CN - , SCN - , N 3 - and OH - aqueous solution (C=2mM), if the fluorescence of the DMSO solution of PNG is quenched, it means that OH is added - , if the fluorescence of the PNG solution does not change, it means that the addition is not OH - .

Embodiment 3

[0065] Embodiment 3, the identification CO of supramolecular polymer PNG 2 gas

[0066] Pipette 2 ml PNG in DMSO (C PNG =2×10 -4 M), and add 5 equivalents of OH - of (C OH - =2mM) aqueous solution to obtain PNG-OH solution, exposed to the air, if the color of the solution becomes lighter after 5 minutes, and the solution completely changes from red to yellow after 10 minutes, indicating that there is CO in the air 2 Gas exists; if exposed to air for 10 minutes, the fluorescence of the solution turns on, indicating the presence of CO 2 gas.

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Abstract

The invention discloses a supramolecular polymer, which is obtained by self-assembling and complexing a pillararene derivative and a bipyridine salt at a molar ratio of 2: 1 in DMSO, wherein the supramolecular polymer shows yellow fluorescence in DMSO; aqueous solutions of F<->, Cl<->, Br<->, I<->, AcO<->, H2PO4<->, SO4<2->, ClO4<->, CN<->, SCN<->, N3<-> and OH<-> are respectively added into a DMSO solution of the supramolecular polymer; only the addition of OH<-> can quench florescence of the supramolecular polymer solution, so that the supramolecular polymer can be used for single selectivefluorescence recognition of OH<->; N2, O2, H2 and CO2 gases are respectively introduced into the DMSO solution of the supramolecular polymer containing OH<->; only the CO2 gas can open the fluorescence of the solution, therefore, the supramolecular polymer can subsequently recognize carbon dioxide in the air; and the recognition performance has an important application value in the field of ion recognition.

Description

technical field [0001] The present invention relates to a supramolecular polymer based on pillar [5] arene derivatives, mainly for single selective recognition of OH - and CO 2 The gas belongs to the field of chemical synthesis and the fields of anion detection and gas detection. Background technique [0002] In the fields of chemistry, biology, environment, etc., ions and molecules play an important role, which is crucial for the detection and separation of some special ions or molecules in the environment, such as: [0003] Acid-base balance plays a key role in various biological processes. It also plays an important role in the development of functional materials such as catalysts, sensors, imaging agents and proton-conducting membranes. For example, under normal human conditions, the pH value of the body should be maintained between 7.3-7.4, which is slightly alkaline. If the pH value of the body is lower than 7.3 for a long time, it will form an acidic body, which w...

Claims

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Application Information

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IPC IPC(8): C08G83/00G01N21/64
CPCC08G83/008G01N21/643G01N2021/6432
Inventor 魏太保朱文博丁金东马小强林奇姚虹张有明
Owner NORTHWEST NORMAL UNIVERSITY
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