Novel core-substituted naphthalene diimide-based conjugated polymers for electrochromic applications. Issue 47 (23rd November 2021)

• Record Type: Journal Article
• Authors: Wang, Kai; Zhu, Lin; Hu, Xuening; Han, Mingxi; Lin, Junyu; Guo, Zhiyong; Zhan, Hongbing
• Is Part Of: Journal of materials chemistry. Volume 9:Issue 47(2021)
• Page Start: 16959
• Page End: 16965
• Publication Date: 2021-11-23
• Subjects: Materials -- Periodicals; Chemistry, Analytic -- Periodicals; Optical materials -- Research -- Periodicals; Electronics -- Materials -- Research -- Periodicals; 543.0284
• DOI: 10.1039/d1tc04446j
• Languages: English
• ISSNs: 2050-7526

Abstract

Abstract : The strategic implementation of using a core-substituted naphthalene diimide derivative to electropolymerize an ionized polymer for a better electrochromic performance is proposed. Abstract : A novel core-substituted naphthalene diimide derivative (DPyNDI-TPA) capped with electroactive triphenylamine was employed as an electroactive precursor to prepare p(DPyNDI-TPA) polymer films through in situ electropolymerization on FTO substrates. In contrast to the non-core-substituted NDI-TPA, the introduction of pyrrolidine groups endows the p(DPyNDI-TPA) films with a distinct morphology and a capability of ionization. Under an electric field, the pyrrolidine group could release an electron and combine with counterions in the electrolyte solution. Moreover, compared with the p(NDI-TPA) films, the wrapped counter anions in the p(DPyNDI-TPA) films could serve as balancing charges in electrochromic processes, which provide the film with a much better electrochromic performance ( e.g., switching stability, coloring–bleaching speed and coloration efficiency). This meaningful design provides new concepts for the design of organic electrochromic materials and shows great prospects in optoelectrical materials.