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Conjugated polymer based on thiophene and benzothiadiazole and preparation method of conjugated polymer

A technology of benzothiadiazole and conjugated polymer, which is applied in the field of donor polymer and its preparation, can solve the problems of harm to human body and environment, expensive synthesis cost, toxic by-products, etc., and achieve good chemical stability and Thermal stability, low synthesis cost, simple and mature synthesis process

Active Publication Date: 2021-12-07
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional coupling method can synthesize most of the polymers. However, organometallic reagents need to be used in the synthesis process, and the coupling will produce equistoichiometric metal by-products at the same time.
The synthesis of these organometallic reagents is expensive, and the by-products themselves and the reaction are usually toxic, which will cause harm to the human body and the environment

Method used

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  • Conjugated polymer based on thiophene and benzothiadiazole and preparation method of conjugated polymer
  • Conjugated polymer based on thiophene and benzothiadiazole and preparation method of conjugated polymer
  • Conjugated polymer based on thiophene and benzothiadiazole and preparation method of conjugated polymer

Examples

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Embodiment 1

[0039] Embodiment 1, preparation based on the conjugated polymer of thiophene and benzothiadiazole

[0040] This example provides a conjugated polymer based on thiophene and benzothiadiazole, and its synthetic route can be found in figure 1 .

[0041] 1.1. Preparation of monomer M1

[0042] The preparation of monomer M1 specifically comprises the following steps:

[0043] (a) Synthesis of intermediate compound A

[0044] The structural formula of intermediate compound A is

[0045]

[0046] Under argon atmosphere, 4,7-dibromo-5-nitrobenzo[c][1,2,5]thiadiazole (5mmol), 2-thiopheneboronic acid (5.5mmol) and tetrahydrofuran (15mL) Add it into a pressure-resistant tube, and after bubbling under the liquid for 20 minutes, add 2M potassium carbonate aqueous solution (10 mL) and tetrakis(triphenylphosphine)palladium (0.025 mmol), remove oxygen from the liquid, and seal it. After reacting at 70°C for 24 hours, extract with water and dichloromethane, dry over anhydrous magnesiu...

Embodiment 2

[0061] Embodiment 2, the gel permeation chromatography of polymer P, ultraviolet absorption spectrum, electrochemical properties and thermal stability 2.1, the gel permeation chromatography of polymer P

[0062] Figure 5 The number average molecular weight measured by gel permeation chromatography (GPC) of polymer P is 6179, the weight average molecular weight is 51856, and the distribution coefficient PDI is 5.01.

[0063] 2.2. UV absorption spectrum of polymer P

[0064] Image 6 The ultraviolet absorption spectrum of polymer P in chlorobenzene solution and film is given. It can be seen that the polymer has two absorption peaks. The maximum absorption peak position of its film is around 648nm, and the maximum absorption peak position of the solution is at 662nm It has a wide absorption range of ultraviolet and visible light, indicating that polymer P has a certain application potential in organic field effect transistors. The onset absorption wavelength of the polymer fi...

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Abstract

The invention relates to a conjugated polymer based on thiophene and benzothiadiazole and a preparation method of the conjugated polymer. The conjugated polymer based on thiophene and benzothiadiazole has wide and strong absorption in a visible-near infrared region, and a flexible side chain can provide good solubility for the material, so that the material can be processed in a solution. Therefore, the material has a potential application prospect in organic field effect transistor devices as a semiconductor active layer donor material. The conjugated polymer based on thiophene and benzothiadiazole is formed by direct arylation polymerization. The method does not need preparation of monomers with organic metal functional groups, is beneficial to higher atom economy, and has the advantages of few synthesis steps, avoidance of harm of toxic substances to human bodies and environments and the like. The polymerization method disclosed by the invention conforms to the environment-friendly and economic green chemical principle.

Description

technical field [0001] The invention relates to a donor polymer with strong absorption in the visible-near infrared region and a preparation method thereof, belonging to the field of organic field effect transistor donor materials. Background technique [0002] An organic field-effect transistor (OFET) is a functional device composed of organic semiconductors with applications ranging from sensors to circuits or data storage. Organic field-effect transistors have the advantages of excellent mechanical flexibility, light weight, low-temperature deposition, low fabrication cost, and large-area printing. Although compared with traditional transistors, organic field effect transistors have lower charge carrier mobility, but they have high environmental sensitivity, selectivity, and mechanical flexibility. Currently, organic field effect transistors have been explored for various sensors. In, for example: gas sensor, humidity sensor, heat sensor, chemical sensor and biological s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G61/12H01L51/05H01L51/30
CPCC08G61/126C08G2261/124C08G2261/3243C08G2261/3246C08G2261/3241C08G2261/354C08G2261/414C08G2261/92C08G2261/592C08G2261/598H10K85/113H10K85/151H10K10/46
Inventor 邓平肖余发孟岩
Owner FUZHOU UNIV
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