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Issue 34, 2019
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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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Article information


Submitted
18 Jan 2019
Accepted
11 Mar 2019
First published
11 Mar 2019

Chem. Commun., 2019,55, 4917-4920
Article type
Communication

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, 55, 4917
DOI: 10.1039/C9CC00455F

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