Very Low Band Gap Thiadiazoloquinoxaline Donor–Acceptor Polymers as Multi-tool Conjugated Polymers

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• 作者：Timothy T. Steckler ; Patrik Henriksson ; Sonya Mollinger ; Angelica Lundin ; Alberto Salleo ; Mats R. Andersson
• 刊名：Journal of the American Chemical Society
• 出版年：2014
• 出版时间：January 29, 2014
• 年：2014
• 卷：136
• 期：4
• 页码：1190-1193
• 全文大小：252K
• ISSN：1520-5126

文摘

Here we report on the synthesis of two novel very low band gap (VLG) donor鈥揳cceptor polymers (Eub>gub> 鈮?1 eV) and an oligomer based on the thiadiazoloquinoxaline acceptor. Both polymers demonstrate decent ambipolar mobilities, with P1 showing the best performance of 10up>鈥?up> cmup>2up> Vup>鈥?up> sup>鈥?up> for p- and n-type operation. These polymers are among the lowest band gap polymers (0.7 eV) reported, with a neutral 位ub>maxub> = 1476 nm (P2), which is the farthest red-shifted 位ub>maxub> reported to date for a soluble processable polymer. Very little has been done to characterize the electrochromic aspects of VLG polymers; interestingly, these polymers actually show a bleaching of their neutral absorptions in the near-infrared region and have an electrochromic contrast up to 30% at a switching speed of 3聽s.