A kind of preparation method and application of hyperbranched azo polymer

A technology of azo polymers and polymers, applied in chemical instruments and methods, color-changing fluorescent materials, etc., can solve the problem of low photoisomerization response rate and degree, and achieve the effect of low driving power

Inactive Publication Date: 2015-08-05
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The structure shows that the p-nitroazobenzene unit in the macromolecule has a lower rate and degree of photoisomerization response than the small molecule p-nitroazobenzene

Method used

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  • A kind of preparation method and application of hyperbranched azo polymer

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Add 3g p-nitrobenzoic acid, 9g sodium hydroxide and 9mL water to a 250mL three-necked flask equipped with a stir bar, stir well and raise the temperature to 35℃; dissolve 21g glucose in 50mL water and add it dropwise within 10min In a three-necked flask, the reaction was maintained at 35°C for 30 minutes, and then the temperature was lowered to 10°C and the reaction continued for 45 minutes. Pour the reaction solution into a beaker, cool it, neutralize it with dilute hydrochloric acid to pH=0.5, and then suction and filter the mixture to obtain a yellow solid; dissolve the solid with sodium hydroxide solution, then add hydrochloric acid for acidification, and a solid is precipitated After suction filtration and washing with water to obtain a yellow solid, put it into the oven to dry.

[0027] In a 100 mL round bottom flask was added 2 g of the above yellow solid, 0.45 g of thionyl chloride, 2 mL of N,N'-dimethylformamide and 10 g of acetone, and refluxed at 60°C for 9 hour...

Embodiment 2

[0030] Add 3g of p-nitrobenzoic acid, 15g of sodium hydroxide and 60mL of water to a 250mL three-necked flask equipped with a stir bar, stir well and raise the temperature to 65℃; dissolve 27g of glucose in 50mL of water and add it dropwise within 2h In a three-necked flask, the temperature was maintained at 65°C for 2h, and then the temperature was lowered to 20°C and the reaction continued for 2h. Pour the reaction solution into a beaker, cool it, neutralize it with acetic acid to pH=7, and then suction filter the mixed solution to obtain a yellow solid; dissolve the solid with ammonium bicarbonate solution, then add acetic acid for acidification, and a solid is precipitated. After suction filtration and washing with water, a yellow solid was obtained, which was placed in an oven to dry.

[0031] Add 2g of the above yellow solid, 4.5g of thionyl chloride, 10mL of N,N'-dimethylformamide and 40g of ethanol into a 100mL round bottom flask, and reflux at 80°C for 15h. After the re...

Embodiment 3

[0034] Add 3g p-nitrobenzoic acid, 11g sodium hydroxide and 40mL water in a 250mL three-necked flask equipped with a stir bar, stir well and raise the temperature to 50℃; dissolve 25g glucose in 50mL water and add dropwise within 30min In a three-necked flask, the temperature was maintained at 50°C for 1 hour, and then the temperature was lowered to 15°C and the reaction continued for 1 hour. Pour the reaction solution into a beaker, cool it, neutralize it with acetic acid to pH=5, and then suction filter the mixed solution to obtain a yellow solid; dissolve the solid with potassium carbonate solution, then add acetic acid for acidification, and precipitate a solid. After filtering and washing with water, a yellow solid was obtained, which was placed in an oven to dry.

[0035] In a 100 mL round bottom flask were added 2 g of the above yellow solid, 1.8 g of thionyl chloride, 5 mL of N,N'-dimethylformamide and 20 g of ethyl acetate, and refluxed at 65° C. for 11 h. After the rea...

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Abstract

The invention relates to a preparation method and applications of a hyperbranched azo polymer, belonging to the organic synthesis field. The preparation method comprises the steps: firstly, performing nitroreduction and carboxyl acylation by taking p-nitrobenzoic acid as a raw material, to obtain an A2 type monomer azo-bi(benzoyl chloride) with an azobenzene structure, and then reacting the A2 type monomer azo phthaloyl dichloride with a B3 type monomer glycerol according to certain mole ratio to obtain the hyperbranched azo polymer. The materials of the obtained hyperbranched azo polymer has higher thermo-optical coefficient which is more than ten times of that of inorganic materials such as borosilicate glass, zinc silicate glass, silica glass and the like, and the material provides a possibility for developing a novel digital thermo-optical switch with low driving power.

Description

technical field [0001] The invention belongs to the field of organic synthesis and relates to the preparation of azobenzene photochromic compounds. Specifically refers to the use of azobenzene chromophore molecules as monomers for the synthesis of hyperbranched macromolecules to prepare hyperbranched azo polymer materials with photochromic properties; Potential applications in the field of optoelectronics such as storage, optoelectronic modulators, and optical switching. Background technique [0002] As a new type of functional material, azobenzene photochromic compounds can be widely used in frontier fields such as optical information storage, optical conversion devices, and optical switches. In the past few decades, linear azo polymers with side-chain or main-chain structures have been intensively studied. Recently, dendrimers containing azobenzene structures have attracted considerable attention and have been intensively studied. Compared with dendritic azo compounds, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G63/685C09K9/02
Inventor 杨冬亚张汉清荣新山陈正宇邱凤仙
Owner JIANGSU UNIV
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