Electrochemichromic solutions, processes for preparing and using the same, and devices manufactured with the same

  • US 5,500,760 A
  • Filed: 08/27/1992
  • Issued: 03/19/1996
  • Est. Priority Date: 09/06/1991
  • Status: Expired due to Fees
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First Claim
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1. An electrochemichromic solution capable of color change when an applied potential is introduced thereto, said electrochemichromic solution comprising:

  • (a) at least one anodic compound, said anodic compound having been previously contacted with a redox agent such that said anodic compound exists in a different valence state than prior to having been contacted with said redox agent, wherein said anodic compound may be a member selected from the class of chemical compounds consisting of the following formulae;

    ##STR8## wherein X and Y may be the same or different and each may be selected from the group consisting of H, any halogen and NRR1, wherein R and R1 may be the same or different and each may be selected from the group consisting of H or any straight- or branched-chain alkyl constituent having from about one carbon atom to about three carbon atoms;

    or X and Y, taken together, represent an aromatic ring structure having six carbon ring atoms when viewed in conjunction with the ring carbon atoms to which they are attached; and

    Z is OH or NRR1, or salts thereof;

    and combinations thereof(b) at least one cathodic compound; and

    (c) a solvent wherein the redox potential of said at least one anodic compound in said different valence state is greater than the redox potential of said at least one cathodic compound while contacted with said solvent.

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