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Coupled electrochromic compounds with photostable dication oxidation states

  • US 20020018281A1
  • Filed: 06/19/2001
  • Published: 02/14/2002
  • Est. Priority Date: 07/09/1999
  • Status: Active Grant
First Claim
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1. An electrochromic medium comprising two or more electroactive compounds, at least one of said electroactive compounds being a coupled electrochromic compound comprising a first anodic monomeric electrochromic compound coupled by a bridge comprising a covalent bond or an intervening hydrocarbon structure optionally containing one or more heteroatoms, to a second anodic monomeric electrochromic compound, and optionally additional monomeric electrochromic compounds such that electronic communication is exhibited between said anodic monomeric compounds.

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