Electrochromic compositions based on diketopyrrolopyrroles

Details Electrochromic compositions based on diketopyrrolopyrroles Electrochromic compositions based on diketopyrrolopyrroles

C - Chemistry, Metallurgy

07

D

C07D 487/04 (2006.01) C07F 9/6561 (2006.01) C09K 9/02 (2006.01) C09K 11/07 (2006.01) C09K 11/60 (2006.01) G02F 1/153 (2006.01)

Patent

CA 2047392

P-18162/A Novel electrochrornic compositions based on diketopyrrolopyrroles Abstract Compositions containing (a) al least one 1,4-diketopyrrolo[3,4-c]pyrrole of the formula I, II, IIa, III or IY Image Image Image (I) (II) (IIa) Image Image (III) (IV) and (b) an auxiliary redox system from the ferrocyanide, ferrocene or ammonium iron(II) sulfate series in combination with at least one conductive salt (c), where, in the formula I, R and R2 are, for example, -H and Rl is -SO3Na, in the formulae II and IIa, R and R3 are, for example, -H, Rl is -SO3H and p is 3, in the formula III, R4 and R5 are, for example, phenyl and R6 and R7 are, for example, methyl, and in the formula IV R8 and R9 are, for example, phenyl, are suitable as electrochromic materials in display systems.

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