D-A type conjugated polymer as well as preparation method and application thereof

A conjugated polymer, D-A technology, applied in chemical instruments and methods, organic compound/hydride/coordination complex catalysts, chemical/physical processes, etc., can solve the problems of low hydrogen evolution rate and high hydrogen evolution rate, and achieve strong Absorption, high chemical and thermal stability, and efficient photocatalytic water splitting for hydrogen production

Active Publication Date: 2021-06-04
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The primary purpose of the present invention is to overcome the problem of low hydrogen evolution rate when the polymer described in the prior art is used for photocatalytic hydrogen production, and to provide a D-A type conjugated polymer, which is used for photocatalytic decomposition of water to produce hydrogen High hydrogen evolution rate, good chemical and thermal stability, and strong absorption in the visible region

Method used

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  • D-A type conjugated polymer as well as preparation method and application thereof
  • D-A type conjugated polymer as well as preparation method and application thereof
  • D-A type conjugated polymer as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The synthetic route of D-A type conjugated polymer described in this embodiment is as follows:

[0033]

[0034] The preparation method of D-A type conjugated polymer described in this embodiment is as follows:

[0035] (1) Synthesis of monomer M1:

[0036] Weigh dibenzothiophene sulfone (10mmol, 2.1625g) into a 25mL round-bottomed flask, add 70mL of concentrated sulfuric acid, stir well, and add NBS (21mmol, 3.7380g) in batches at 0°C; After reacting for 24h, the reaction solution was poured into ice water and stirred, the solid was washed with water and methanol until PH = 7, passed through CH 3 Cl recrystallization gave 3,7-dibromodibenzo[b,d]thiophene 5,5-dioxide (white solid);

[0037] Weigh 3,7-dibromodibenzo[b,d]thiophene 5,5-dioxide (10mmol, 3.7405g), biboronic acid pinacol ester (30mmol, 7.620g), potassium acetate (60mmol, 5.880 g) and Pd(dppf)Cl 2 (0.5mmol, 0.3658g) was added to a 250mL two-necked flask, and the gas was ventilated three times to remove ...

Embodiment 2

[0042] The synthetic route of D-A type conjugated polymer described in this embodiment is as follows:

[0043]

[0044] The preparation method of D-A type conjugated polymer described in this embodiment is as follows:

[0045] (1) Synthesis of conjugated polymer P2;

[0046] Add monomer M1 (0.5mmol, 0.2341g) and monomer M3 (0.25mmol, 0.1139g) in a 48ml glass pressure bottle; then add Pd (pph) in a nitrogen-filled glove box 3 ) 4 (0.025mmol, 29mg), K 2 CO 3(2mol / L, 6mL) and DMF (12mL), tighten the tetrafluoro stopper; react at 160°C for 48h. After the reaction solution was cooled to room temperature, it was dropped into methanol solution, and the crude product was obtained by filtration, which was subjected to Soxhlet extraction with methanol, n-hexane, dichloromethane, and tetrahydrofuran, respectively. The remaining solid was washed with methanol and dried in vacuum for 24 hours to obtain 152.7 mg of yellow-brown conjugated polymer P2. After testing, the degree of po...

Embodiment 3

[0049] The synthetic route of D-A type conjugated polymer described in this embodiment is as follows:

[0050]

[0051] The preparation method of D-A type conjugated polymer described in this embodiment is as follows:

[0052] (1) Synthesis of monomer M5:

[0053] Weigh 1,3,5-tribromobenzene (10mmol, 3.1480g), thiophen-2-ylboronic acid (35mmol, 4.4786g) and Pd (pph 3 ) 4 (0.5mmol, 0.5778g) was added into a 250mL two-necked flask, and the oxygen in the reaction flask was removed by pumping and purging three times. Add potassium phosphate (2mmol·L -1 , 10 mL) and anhydrous THF (100 mL). React at 85°C for 20h. Washed with saturated NaCl solution and extracted with dichloromethane, the crude product was purified by silica gel column chromatography, and recrystallized with tetrahydrofuran / methanol to obtain white solid 1,3,5-tri(thiophen-2-yl)benzene;

[0054] Weigh 1,3,5-tris(thiophen-2-yl)benzene (1mmol, 0.3245g) into a round bottom flask, add THF (20mL); at 0°C, add NBS...

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Abstract

The invention discloses a D-A type conjugated polymer and a preparation method and application thereof. The polymer is obtained by taking dibenzothiophene sulfone as an electron donor and constructing different electron acceptor units through a cross-coupling strategy, and the polymer has high chemical stability and thermal stability, shows strong absorption in a visible light region, can efficiently use the sunlight, and has excellent photocatalytic water decomposition hydrogen production performance under the condition that no cocatalyst is added.

Description

technical field [0001] The present invention relates to the technical field of conjugated polymer materials, and more specifically relates to a D-A type conjugated polymer and its preparation method and application. Background technique [0002] With the rapid development of the global economy, the speed of human energy consumption is accelerating, but the reserves of non-renewable mineral resources such as oil and coal mines are decreasing year by year. In the near future, energy problems will seriously affect the development and progress of society. At the same time, excessive use of fossil fuels will also It has brought serious environmental problems such as frequent extreme weather and accelerated biological extinction. Therefore, it is of great strategic significance to develop a green and sustainable energy source. Using sunlight to irradiate the catalyst to cause photon transitions, decompose water under certain conditions to generate hydrogen, which can realize the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G61/12B01J31/06C01B3/04
CPCC08G61/126B01J31/063B01J35/004C01B3/042C08G2261/12C08G2261/132C08G2261/3223C08G2261/3243C08G2261/411Y02E60/36
Inventor 吴传德姜雪霏金耀城黄晓锋王首明
Owner GUANGDONG UNIV OF TECH
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