| 摘要 |
PURPOSE:To obtain an electrochromic display element improved in response characteristics, durability against repeated actions, contrast, etc., by using a reactive medium containing a styryl-like compd., a specified supporting electrolyte, and a basic solvent. CONSTITUTION:An electrochromic display element is manufactured by arranging between 2 conductive electrodes, at least one of the two being transparent, a reactive medium containing a styryl-like compd. having formulaI, such as formula VI, etc., a supporting electrolyte, such as (C4H9)4N.PF6 or (C4H9)4N. BF4, and a basic solvent, such as dimethylformamide or dimethylacetamide. In formulaI, n is 1 or 2; A is H, lower alkyl, halogen, or alkoxyalkyl, a group of formula II-IV; Z is 2-4C alkylene optionally substituted by alkyl necessary to form a cyclic structure together with a group of formula V; Y is O or S; and R is lower alkyl. In formula VII, R1 is 2-8C alkyl, and X is ClO4, -PF6, -BF4, or -SO3CF3. |
