| abstract |
The structural formula of the cathodic electrochromic compound is The pyridine ring in the middle is connected to any carbon atom on both sides of the pyridine ring through a CC bond; R 1 is selected from an alkyl group containing 2-20 carbon atoms; R 2 -R 12 are substituents on carbon atoms, each independently selected From H, alkyl, cycloalkyl, polycycloalkyl, aryl, heterocycloalkyl, aralkyl and alkaryl of 1-50 carbon atoms or alkyl of 1-50 carbon atoms, Groups containing halogen, N, O, S, Si, P or unsaturated bonds in cycloalkyl, polycyclic alkyl, aryl, heterocycloalkyl, aralkyl and alkaryl; X is selected from methyl Phenylsulfonate anion, tetrafluoroborate anion, hexafluoroborate anion, perchlorate anion, bisoxalateborate anion, oxalate difluoroborate anion, bis(trifluoromethanesulfonyl)imide anion and tris( Trifluoromethanesulfonyl)methyl anion. The color-changing device of the invention has long service life, deep color and can greatly reduce the transmittance of visible light in the electrified state. |