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Polythiophene with hydrophilic group in side chain and preparation method thereof

A hydrophilic group, polythiophene technology, applied in the field of polythiophene compounds, can solve the problems of low bromination yield and harsh conditions of late polymerization reaction, achieve good heat resistance, good interface compatibility, enhanced electron injection Effect

Inactive Publication Date: 2018-01-05
NANJING FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method usually has a low bromination yield and harsh polymerization conditions in the later stage

Method used

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  • Polythiophene with hydrophilic group in side chain and preparation method thereof
  • Polythiophene with hydrophilic group in side chain and preparation method thereof
  • Polythiophene with hydrophilic group in side chain and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The synthetic route of the polythiophene that side chain contains alkoxy group is as follows:

[0024]

[0025] The overall process is: 3-methoxythiophene in NaHSO 4 As a catalyst, toluene reacts with long-chain alcohol methyl ethers such as ethylene glycol monomethyl ether, diethylene glycol monomethyl ether, triethylene glycol monomethyl ether, and tetraethylene glycol monomethyl ether under the condition of solvent reflux to obtain 3- Alkoxy-substituted thiophene monomers 1a-1h. The series of monomers were in chloroform, anhydrous FeCl 3 As an oxidizing agent, nitrogen is used as a protective gas, and the polythiophene compounds 2a-2h having side chains containing alkoxy groups are obtained by polymerization at a temperature ranging from -10° C. to room temperature.

[0026] Synthesis of Compound 1a 3-(2-Methoxy)ethoxythiophene

[0027] 3-methoxythiophene 5mmol, ethylene glycol monomethyl ether 10.5mmol, NaHSO 4 2mmol and 25mL of toluene were added into a 250...

Embodiment 2

[0054] The synthetic route of the polythiophene that side chain has alcoholamine group is as follows:

[0055]

[0056] The overall process is: 3-methoxythiophene in NaHSO 4 As a catalyst, under the condition that toluene is the solvent and refluxes, coupling occurs with monohalogenated glycols such as 2-chloroethanol, 2-(2-chloroethoxy)ethanol, 2-bromoethanol, 2-(2-bromoethoxy)ethanol, etc. reaction to obtain alkoxy-substituted polythiophene monomers whose end groups are chlorine or bromine; then, the series of thiophene derivatives in K 2 CO 3 Under the conditions of heating and refluxing in an organic solvent such as N,N-dimethylformamide and other alkalis as catalysts, react with diethanolamine respectively to obtain thiophene monomers 4a-4d whose side chain end groups are diethanolamino groups; finally, In chloroform, anhydrous FeCl 3 As an oxidizing agent, polythiophene with side chains having alcoholamine groups can be obtained by polymerizing at -10°C to room tem...

Embodiment 3

[0083] The side chains prepared in Example 1 and Example 2 contain alkoxy groups and the side chain end groups are alcohol aminopolythiophene compounds for contact angle testing. The test method is: the polymer is configured to have a concentration of 10 -3 mg / mL chloroform solution, and then spin-coated on a clean polished silicon wafer by spin coating method (1000rpm, 30s), and the silicon wafer was placed in a vacuum oven to dry for 24 hours. The water droplet was dropped on the polymer film by the fixed drop method, and then the contact angle between the water droplet and the polymer film was measured by the goniometric method. The result is as figure 1 As shown, the contact angle of poly(3-methoxy)thiophene (POMT) is 95.3°, and the contact angle greater than 90° indicates that the surface of the film is a hydrophobic surface. However, the film contact angles of polythiophenes 2a, 2b, 2c, 2d, 5a and 5b synthesized by the present invention are all less than 90°, indicating...

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Abstract

The invention discloses a polythiophene with the side chain containing a hydrophilic group, and a preparation method thereof. The method comprises the following steps: carrying out a 2-step reaction on 3-methoxythiophene used as a raw material to synthesize a hydrophilic polythiophene derivative with the side chain containing an alkyloxy group; and carrying out a 3-step reaction to synthesize a hydrophilic polythiophene derivative with an alkylolamino-terminated side chain. The polythiophene derivative film of polythiophene with the side chain containing a hydrophilic group is hydrophilic, and contact angle test shows that the polythiophene with the terminal group containing an alkylolamino group has better hydrophilicity than the polythiophene with the side chain only containing the alkyloxy group, has excellent performances not possessed by general polymeric materials, and can be used in new generation photoelectric devices and chemiluminescence and bioluminescence sensors.

Description

technical field [0001] The invention belongs to polythiophene compounds, in particular to a polythiophene derivative with a hydrophilic group in the side chain and a preparation method thereof. Background technique [0002] Polythiophene and its derivatives have conjugated structures and are important organic conjugated polymer materials. Compared with other conductive polymers such as polyaniline, polypyrrole, and polyacetylene, thiophene aromatic heterocycles have higher stability to oxygen and humidity, and polythiophene derivatives have lower band gaps; on the other hand, polythiophene doped and dedoped states have good environmental stability. As functional materials, polythiophene derivatives can be widely used in the field of photoelectric conversion materials and devices. [0003] Unsubstituted polythiophene cannot be used in polymer photovoltaic materials due to its poor solubility. The 3-position substitution or 3,4-position double substitution of the thiophene r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G61/12
CPCC08G61/126C08G2261/1424C08G2261/143C08G2261/3223C08G2261/354C08G2261/514C08G2261/91
Inventor 李月琴王竹叶杨志伟
Owner NANJING FORESTRY UNIV
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