Patent ID: 6519072
Filing Date: 2003-02-11
Classification: C09K,G02F

Abstract:
An electrochromic device having an ion conductive layer disposed between two electrically conductive substrates, at least one of which is transparent, wherein said ion conductive layer contains an organic compound having a structure exhibiting a cathodic electrochromic characteristic and a structure exhibiting an anodic electrochromic characteristic, and wherein the organic compound is a metallocene-bipyridine derivative represented by one of formulae (4) to (7): wherein Aâˆ’ and Bâˆ’ are each independently a pair-anion selected from the group consisting of a halogen anion, ClO4âˆ’, BF4âˆ’, PF6âˆ’, AsF6âˆ’, SbF6âˆ’, CHCOOâˆ’, and CH3(C6H4)SO3âˆ’;R1 and R2 are each independently a hydrocarbon group selected from the group consisting of an alkyl, alkenyl and aryl group having 1 to 10 carbon atoms, in the case where R1 or R2 is an aryl group, the aryl group forms a condensed ring together with a cyclopentadienyl ring, m is an integer of 0&lE;m&lE;4, n is an integer of 0&lE;n&lE;4;Me represents Cr, Co, Fe, Mg, Ni, Os, Ru, V, Xâ€”HFâ€”Y, Xâ€”Moâ€”Y, Xâ€”Nbâ€”Y, Xâ€”Tiâ€”Y, Xâ€”Vâ€”Y or Xâ€”Zrâ€”Y wherein X and Y are each independently selected from the group consisting of hydrogen, halogen, and an alkyl group having 1 to 12 carbon atoms;R3 and R4 are each independently a hydrocarbon residue having 1 to 20 carbon atoms;R5 is a hydrocarbon group selected from the group consisting of an alkyl, cycloalkyl, alkenyl, aryl, or aralkyl group having 1 to 20 carbon atoms, a heterocyclic group having 4 to 20 carbon atoms, and a substituted hydrocarbon or heterocyclic group obtained by substituting part of the hydrocarbon group or heterocyclic group with a substituent group.