| abstract |
An electrochromic device having an electrochromic medium which includes a compound represented by the following formula:(I) wherein R 1 R 10 are the same or different and comprise H, an alkyl, cycloalkyl, polycycloalkyl, heterocycloalkyl, aryl, alkaryl, aralkyl, alkoxy, alkenyl, and/or alkynyl group containing approximately 1 to approximately 50 carbon atom(s), wherein the carbon atom(s) may be a linking group to, or part of, a halogen, a N, O, and/or S containing moiety, and/or one or more functional groups comprising alcohols, esters, ammonium salts, phosphonium salts, and combinations thereof; with the proviso that R 2 and R 7 each comprise at least two carbon atoms, at least one of R 2 and R 7 comprises less than 2 β hydrogen atoms and is void of a benzyl group. |