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Electrochromism of fast photochromic radical complexes forming light-unresponsive stable colored radical cation

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Abstract

We demonstrated the electrochromism of photochromic radical complexes containing triaryl imidazole: fast photoswitchable pentaarylbiimidazole (PABI) and the phenoxyl–imidazolyl radical complex (PIC). Cyclic voltammetry and spectroelectrochemistry revealed that PABI and PIC generate the highly stable radical cation by one-electron oxidation accompanied by a color change from colorless to green. The stability of the radical cation is strongly affected by the dihedral angle between the imidazole ring and the phenyl ring at the 2-position of the imidazole ring.

Graphical abstract: Electrochromism of fast photochromic radical complexes forming light-unresponsive stable colored radical cation

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Publication details

The article was received on 18 Jan 2019, accepted on 11 Mar 2019 and first published on 11 Mar 2019


Article type: Communication
DOI: 10.1039/C9CC00455F
Citation: Chem. Commun., 2019, Advance Article

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    Electrochromism of fast photochromic radical complexes forming light-unresponsive stable colored radical cation

    K. Yamamoto, I. Gomita, H. Okajima, A. Sakamoto, K. Mutoh and J. Abe, Chem. Commun., 2019, Advance Article , DOI: 10.1039/C9CC00455F

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