Electrochromism of fast photochromic radical complexes forming light-unresponsive stable colored radical cation. Issue 34 (18th March 2019)

• Record Type: Journal Article
• Authors: Yamamoto, Katsuya; Gomita, Isshu; Okajima, Hajime; Sakamoto, Akira; Mutoh, Katsuya; Abe, Jiro
• Is Part Of: Chemical communications. Volume 55:Issue 34(2019)
• Page Start: 4917
• Page End: 4920
• Publication Date: 2019-03-18
• Subjects: Chemistry -- Periodicals; 540
• DOI: 10.1039/c9cc00455f
• Languages: English
• ISSNs: 1359-7345

Abstract

Abstract : We demonstrated the electrochromism of photochromic radical complexes containing triaryl imidazole: fast photoswitchable pentaarylbiimidazole (PABI) and the phenoxyl–imidazolyl radical complex (PIC). 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.