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Conjugated polymer gelling agent poly(phenylene ethynylene) and preparation method thereof

A technology of conjugated polymers and polyphenylene acetylene, applied in the field of supramolecular self-assembly and gel materials, can solve problems such as not too clear

Inactive Publication Date: 2013-04-10
NANJING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its application is not too clear at present, the coagulation mechanism is still in the exploratory stage, and a lot of work is still needed

Method used

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  • Conjugated polymer gelling agent poly(phenylene ethynylene) and preparation method thereof
  • Conjugated polymer gelling agent poly(phenylene ethynylene) and preparation method thereof
  • Conjugated polymer gelling agent poly(phenylene ethynylene) and preparation method thereof

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Experimental program
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Embodiment 1

[0034] Embodiment 1, the synthesis of novel conjugated polymer gelling agent polyphenylene acetylene, synthetic route diagram is as follows figure 1 shown.

[0035]

[0036] (1) Synthesis of 1,4-diiodo-2,5-benzenediol:

[0037] Synthesis of 1,4-dimethoxy-2,5-diiodobenzene: 13.9 g (100.7 mmol) of 1,4-dimethoxybenzene, 8.8 g (8 mmol) of potassium iodate and 28.3 g of iodine ( 112.3 mmol) was dissolved in 500 ml of pure acetic acid, then 50 ml of water and 5 ml of concentrated sulfuric acid were added, and stirred at 85 °C for 24 hours, and the reaction was protected from light, and precipitation occurred during the reaction. After cooling to room temperature, the precipitate was collected by suction filtration, and the solid was neutralized by washing with a large amount of potassium carbonate solution and water to obtain a brown solid primary product, which was then dissolved with a large amount of dichloromethane and extracted with aqueous sodium bisulfite solution. Afte...

Embodiment 2

[0057] Embodiment 2, the method for preparing gel by novel conjugated polymer gelling agent polyphenylene acetylene

[0058] Generally, the preparation of gels generally adopts the "heating-cooling method", and is generally temperature-sensitive and reproducible. Unlike common preparation methods, the preparation of the gel does not require heating, and a good solvent and a poor solvent are directly mixed to prepare the gel. The gel is soluble in acetic acid, dichloromethane, tetrahydrofuran and other organic solvents, and insoluble in water, methanol, acetone and other solvents. Mix acetic acid and water in a certain volume ratio, put a certain amount of gel, and stand at room temperature. More than 12 hours, without heating, the formation of gel can be found. The experiment found that the volume ratio of acetic acid and water is between 1 / 2 and 1 / 2.5, the limit gel concentration is about 9mg / ml, and the gel-solution conversion The temperature is about 52°C.

[0059] Mech...

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Abstract

The invention relates to synthesis of a conjugated polymer gelling agent poly(phenylene ethynylene) and a gel preparation method. The novel conjugated polymer gelling agent poly(phenylene ethynylene) is synthesized through Sonogashira coupling reaction, wherein the gelling agent can be formed into a gel in a solvent of acetic acid and water mixed according to a certain ratio without being heated, and the thermosensitivity is still retained, i.e. when heating to a certain temperature, the gel state can be destroyed and changed into a solution state; and when standing at room temperature for a certain time, the gel state can be restored. In addition, a tertiary amine group is introduced onto the side chain innovatively, and nuclear magnetic and spectral characterizations discover that the tertiary amine group can generate a hydrogen bond after being added to the acetic acid, thus having the effect of accelerating the formation of the gel. Besides, the invention performs multiple characterizations (such as ultraviolet absorption spectrum, fluorescence spectrum, transmission electron microscope, scanning electron microscope, X-ray diffraction and the like) on the gel system and researches the gel formation mechanism.

Description

technical field [0001] The invention belongs to the technical field of supramolecular self-assembly and gel materials, and in particular relates to a novel conjugated polymer gel agent polyphenylene acetylene and a preparation method of the gel. technical background [0002] In recent years, due to the wide application prospects of conjugated polymers in optoelectronic devices, such as a new generation of flat panel display devices, lasers, solar cells, biosensors, etc., it has aroused the research enthusiasm of many scientific researchers. In addition to the charge characteristics of a single molecule itself, that is, the characteristics of "molecular wires" (electrons or energy can quickly transfer on the conjugated main chain), it is often related to some polymolecular forces formed between molecules through some supramolecular non-covalent forces. The morphological structure of the scale is inseparable. The macroscopic properties of many conjugated polymers are closely ...

Claims

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Application Information

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IPC IPC(8): C08G61/02C08J3/075C08L65/00
Inventor 范曲立黄维陈旭
Owner NANJING UNIV OF POSTS & TELECOMM
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