Electrochromic compound, electrochromic composition, and electrochromic device and electrochromic dimming device

摘要

PROBLEM TO BE SOLVED: To provide an electrochromic compound having excellent repetition durability, and during decoloration, having no absorption band so as to exhibit no color in a decolored state.SOLUTION: An electrochromic compound is expressed by a general formula (1). (Xand Xindependently denote a carbon atom or a nitrogen atom, respectively; R-Rindependently denote a halogen atom, a substituted or unsubstituted alkyl group or a substituted or unsubstituted alkoxy group, respectively; x denotes an integer of 0-3; y and z independently denote an integer of 0-4, respectively; and at least one of Land Ldenotes a univalent functional group connected to a nitrogen atom of a pyridinium ring interposing or directly not interposing a divalent substituent group.)SELECTED DRAWING: Figure 1