A new type of tricolor electrochromic system based on the dynamic redox properties of hexaarylethane derivatives
Abstract
Electrochemical interconversion between 9,9,10,10-tetraaryldihydrophenanthrene 1 and 2,2′-bis(triarylmethylium) 22+ has been proven to proceed via open form cation radical 2+· as a stable intermediate; using these three species, a novel tricolor electrochromic system that exhibits hysteretic color change (color 1 → color 2 → color 3 → color 1) is formed.