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A kind of sulfone-based water-soluble and temperature-responsive fluorescent polymer and its preparation method

A temperature-responsive, fluorescent polymer technology, applied in the field of polymer materials, can solve problems such as restricting applications, and achieve the effects of reducing difficulty, widening sources and saving costs

Active Publication Date: 2020-09-04
ANHUI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since most polymers and materials made of polymers are insoluble in water, their application in the field of fluorescence detection is largely limited.

Method used

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  • A kind of sulfone-based water-soluble and temperature-responsive fluorescent polymer and its preparation method
  • A kind of sulfone-based water-soluble and temperature-responsive fluorescent polymer and its preparation method
  • A kind of sulfone-based water-soluble and temperature-responsive fluorescent polymer and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Add 10mmol 4,4′-dihydroxydiphenylsulfone, 5mL triethylamine, and 30mL tetrahydrofuran (THF) into the round bottom flask, stir to dissolve. Under the condition of ice-water bath, 30 mmol of methacryloyl chloride was dissolved in 5 mL of tetrahydrofuran and slowly added dropwise into the flask, and stirring was continued at room temperature for 12 h. The precipitate was removed by filtration, and the solvent was removed by rotary evaporation of the filtrate. 100 mL of water was added to the reaction flask, left at room temperature for 24 hours, then filtered and dried. The white solid was recrystallized from absolute ethanol to obtain a polymerizable fluorescent monomer.

[0024] Take 15mmol NIPAM, 35mmol AM and 0.1g polymerizable fluorescent monomer in a three-necked flask, add 45mL tetrahydrofuran solvent, weigh 0.04g AIBN and dissolve it in 5mL tetrahydrofuran, and mix with the monomer mixture evenly. Nitrogen was blown for 15 minutes to remove oxygen, and the reactio...

Embodiment 2

[0026] Fluorescence testing of fluorescent polymers and polymerizable fluorescent monomers:

[0027] image 3 It is the fluorescence spectrogram of polymerizable fluorescent monomer and fluorescent polymer in aqueous ethanol solution in Example 2. In the figure, the wavelength of the maximum absorption peak of the polymer and the polymerizable fluorescent monomer is similar. It can be inferred that the monomerization of sulfone and copolymerization with other monomers did not change its fluorescent properties.

[0028] Fluorescence-temperature responsiveness of polymers:

[0029] Test the fluorescence spectrum of fluorescent polymer aqueous solution (about 1mg / mL) at different temperatures, by Figure four It can be seen that at the wavelength of 292nm, the fluorescence intensity reaches the maximum and does not change with the change of temperature. In the tested temperature range, the general trend is that the temperature increases, and the fluorescence intensity of the pol...

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Abstract

The invention relates to a sulfone-based water-soluble and temperature-responsiveness fluorescent polymer and a preparation method thereof and belongs to the field of high molecular materials. The preparation method is specifically implemented according to the following steps: (1) taking 4,4'-dihydroxydiphenyl sulfone, triethylamine and methacryloyl chloride to react, so as to prepare a polymerizable fluorescent polymer; (2) carrying out free radical polymerization reaction on the polymerizable fluorescent polymer, acrylamide (AM) and N-isopropylacrylamide (NIPAM) to obtain the water-soluble and temperature-responsiveness fluorescent polymer. A highly-conjugated 4,4'-dihydroxy diphenyl sulfone system is composed of sulfonyl, an oxygen atom of hydroxyl and two benzene rings, so that the fluorescent performance of the polymer is ensured; the polymer has very good solubility in a water phase through a multi-amino water-soluble group; meanwhile, the NIPAM is a temperature-sensitive monomer, can be used for effectively controlling relatively low critical solution temperature of the polymer and has temperature responsiveness. (The formula is shown in the description.).

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a sulfone-based water-soluble and temperature-responsive fluorescent polymer and a preparation method thereof. Background technique [0002] Fluorescence detection technology has become one of the hot topics in the research field because of its high sensitivity and extremely wide dynamic response range. However, in practical applications, small molecular fluorescent compounds have some disadvantages such as easy to fall off, poor compatibility with base materials, poor instrument stability, etc., which limit their application range to a certain extent. Fluorescent polymers introduce small molecular fluorescent groups into polymers in the form of chemical bonds, which have the advantages of stable content, uniform distribution and not easy to fall off. Since most polymers and materials made of polymers are insoluble in water, their application in the field of fluorescence detecti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/54C08F220/56C08F222/24
CPCC08F220/54C08F220/56C08F222/1025
Inventor 王斌马祥梅
Owner ANHUI UNIV OF SCI & TECH