Gentex Corporation
Low dimerizing viologen electrochromic compounds and devices

Abstract:

A low dimerizing electrochromic compound for use in electrochromic mediums and electro-optic elements incorporating said electrochromic mediums is provided. The low dimerizing electrochromic compound is represented by Formula (I): ##STR00001## wherein each R.sub.1 is individually an alkyl, a hydroxyalkyl, or an alkyl substituted with at least one polymerizable functional group; each R.sub.2 is a hydrogen; each R.sub.3 is individually a hydrogen or an alkyl; and each R.sub.4 is individually a hydrogen, an alkyl, or a hydroxyalkyl; and X.sup.- is an anion.