A Distannylated Monomer of a Strong Electron-Accepting Organoboron Building Block: Enabling Acceptor-Acceptor-Type Conjugated Polymers for n-Type Thermoelectric Applications

被引：94
作者：
Dong, Changshuai [1 ,2 ]
Deng, Sihui [1 ,2 ]
Meng, Bin [1 ]
Liu, Jun [1 ,2 ]
Wang, Lixiang [1 ,2 ]
机构：
[1] Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China
[2] Univ Sci & Technol China, Hefei 230026, Peoples R China
来源：
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION | 2021年 / 60卷 / 29期
基金：
中国国家自然科学基金;
关键词：
acceptor-acceptor conjugated polymers; conducting materials; doping; organic thermoelectrics; organoboron polymers; STRUCTURE-PROPERTY CORRELATIONS; SEMICONDUCTORS SYNTHESIS; SOLAR-CELLS; UNIT; DONOR; COPOLYMERS; AFFINITY; DESIGN;
D O I：
10.1002/anie.202105127
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Acceptor-acceptor (A-A) copolymerization is an effective strategy to develop high-performance n-type conjugated polymers. However, the development of A-A type conjugated polymers is challenging due to the synthetic difficulty. Herein, a distannylated monomer of strong electron-deficient double B <- N bridged bipyridine (BNBP) unit is readily synthesized and used to develop A-A type conjugated polymers by Stille polycondensation. The resulting polymers show ultralow LUMO energy levels of -4.4 eV, which is among the lowest value reported for organoboron polymers. After n-doping, the resulting polymers exhibit electric conductivity of 7.8 S cm(-1) and power factor of 24.8 mu W m(-1) K-2. This performance is among the best for n-type polymer thermoelectric materials. These results demonstrate the great potential of A-A type organoboron polymers for high-performance n-type thermoelectrics.
引用
收藏
页码：16184 / 16190
页数：7
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