| 摘要 |
PURPOSE: Provided is an electrochromic composition used for car mirrors, window glass for controlling permeability, and displays, which dose not generate the separation of layers though the composition is used for a long time and can prevent characteristic degradation. CONSTITUTION: The electrochromic composition contains: a cathodic reduction component containing a cation comprising the formula I and/or II and an anion selected from the group consisting of Cl-, Br-, I-, BF4-, ClO4-, wherein the cathodic reduction component has a concentration of 0.01-0.1M; an anodic oxidation component containing ferrocene(formula I), which has a concentration of 0.01-0.1M; a solvent containing propylene carbonate and gamma-butyrolactone. In the formula, R21 and R22 are C1-C10 alkyl, phenyl or benzyl substituted by a group selected from Cl, Br, cyano, C1-C4 alkyl, and R31 is C1-C10 alkyl.
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