Energy-saving and long-life electrochromic materials of naphthalene diimide-cored pyridinium salts

Developing electrochromic materials with energy-saving ( i.e. , low driving voltage) and long-life ( i.e. , high switching stability) properties is highly desirable with respect to practical application. In this work, we report the synthesis of two N , N ′-di(4-pyridyl)-1,4,5,8-naphthalene diimide d...

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Bibliographic Details
Published in:Journal of materials chemistry. C, Materials for optical and electronic devices Materials for optical and electronic devices, 2020-08, Vol.8 (29), p.131-138
Main Authors: Li, Feng, Huang, Zhen-jie, Zhou, Qian-hua, Pan, Ming-yue, Tang, Qian, Gong, Cheng-bin
Format: Article
Language:English
Subjects:
Chemical reduction
Density functional theory
Dianhydrides
Diimide
Electrochemical analysis
Electrochromic cells
Electrochromism
Electronic paper
Energy conservation
Naphthalene
Properties (attributes)
Smart materials
Stability
Sunglasses
Switching
Synthesis
Traffic signs
Windows (apertures)
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Summary:Developing electrochromic materials with energy-saving ( i.e. , low driving voltage) and long-life ( i.e. , high switching stability) properties is highly desirable with respect to practical application. In this work, we report the synthesis of two N , N ′-di(4-pyridyl)-1,4,5,8-naphthalene diimide derivatives (DPNDIs), (Me 2 DPNDI)·(2I) and (benzyl 2 DPNDI)·(2Br), and the characterization of their electrochemical and electrochromic properties. Both DPNDIs showed two quasi-reversible redox couples in the cyclic voltammograms with cathodic peak potentials of approximately −0.30 and −0.70 V vs. Ag/Ag + . The electrochromic devices based on ((Me 2 DPNDI)·(2I) and (benzyl 2 DPNDI)·(2Br)) gave a colored state of dark orange and orange, respectively, which are colored states that have rarely been reported, and both DPNDIs had a low onset bias of −0.7 V and good switching stabilities (the change in optical contrast after 7200 s of
ISSN:2050-7526
2050-7534
DOI:10.1039/d0tc00250j