文献类型：期刊文献

英文题名：Achieving excellent colorimetric properties of low-cost black to transmissive switching electrochromic polymers by incorporating of spacing units into copolymers of 3,4-propylenedioxythiophene and benzothiadiazole

作者：Chen, Cheng[1,2];Yan, Qifan[1,2]

机构：[1]East China Univ Sci & Technol, Key Lab Adv Mat, Sch Chem & Mol Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Feringa Nobel Prize Scientist Joint Res Ctr, Sch Chem & Mol Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China

年份：2020

卷号：178

外文期刊名：DYES AND PIGMENTS

收录：;EI(收录号：20201308365192);WOS:【SCI-EXPANDED(收录号:WOS:000525304400042)】；

基金：This work was financially supported by Furcifer Inc. (USA), the National Natural Science Foundation of China (21602061), and the Fundamental Research Funds for the Central Universities, China (WJ1714009). All device fabrication and test procedures were carried out at Furcifer Inc. (USA).

语种：英文

外文关键词：Electrochromism; Low-cost preparation; C-H arylation; Colorimetric property; Conjugation

摘要：There have been increasing research attention directed towards black to transmissive switching electrochromic polymers, few reports employed simple polymers with a low production cost. Herein, we report the preparation of a series of polymers P2-P6 by incorporating different spacing units (i.e. carbazole, naphthalene, and phenylene) into the well-studied polymer P1, a copolymer of 3,4-propylenedioxythiophene (ProDOT) and benzothiadiazole (BTD). Simple preparation of polymers P2-P6 with spacing units were realized via C-H arylation polymerization between corresponding monomers, which are readily available. By inserting such phenyl-ring containing spacing units into oligoProDOT moieties, conjugation between ProDOT units was disrupted. Thus, polymers P2-P6 based electrochromic devices show a new absorption peak in short wavelength region (400 nm-500 nm) resulting a* and xb* values (<+/- 10), which are closer to a true black hue than that of P1 (-1.2, -15.39) in neutral state. Meanwhile, we demonstrate that the colorimetric properties of P4 (0.32, -6.43) and P6 (-0.06, -4.26) are better performing than most existing black polymers.