Novel polyimides containing flexible carbazole blocks with electrochromic and electrofluorescencechromic properties

Rongrong Zheng; Tao Huang; Zhipeng Zhang; Zhiyao Sun; Haijun Niu; Cheng Wang; Wen Wang

doi:10.1039/c9ra10515h

Novel polyimides containing flexible carbazole blocks with electrochromic and electrofluorescencechromic properties

RSC Adv. 2020 Feb 14;10(12):6992-7003. doi: 10.1039/c9ra10515h. eCollection 2020 Feb 13.

Authors

Rongrong Zheng¹, Tao Huang¹, Zhipeng Zhang¹, Zhiyao Sun¹, Haijun Niu¹, Cheng Wang¹, Wen Wang²

Affiliations

¹ Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, Department of Macromolecular Science and Engineering, School of Chemical, Chemical Engineering and Materials, Heilongjiang University Harbin 150080 P. R. China wangc_93@163.com haijunniu@hotmail.com.
² School of Materials Science and Engineering, Harbin Institute of Technology Harbin 150080 P. R. China.

Abstract

A series of polyimides (PIs) were prepared by polycondensation of a diamine monomer with five anhydrides (1,2,4,5-benzenetetracarboxylic anhydride (BTA), 1,4,5,8-naphthalenetetracarboxylic dianhydride (NTD), 3,3',4,4'-biphenyltetracarboxylic dianhydride (BTD), 4-[(1,3-dihydro-1,3-dioxo-5-isobenzofuranyl)oxy]-1,3-isobenzofurandione (DDII), and 3,3',4,4'-benzophenonetetracarboxylic dianhydride (BPTD)), which have anodic electrochromic (EC) properties. These PIs not only show good solubility and thermal stability, but also demonstrate stable electrochemical oxidation behavior and good EC properties, and the highest retained electroactivity reaches 99% after 600 cycles. In addition, the series of PIs exhibit excellent electrofluorescencechromic (EFC) properties. Therefore, the novel materials will contribute to the application of EC or EFC displays in the future.