Importance

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Abstract

An electrochromic device comprising at least one substantially transparent substrate having an electrically conductive material associated therewith, and an electrochromic medium which comprises a solvent, a cathodic material, and an anodic electrochromic material represented by the formula: ##STR1## wherein R.sub.1 -R.sub.10 are the same or different and at least three of R.sub.1 -R.sub.10 are the same or different and comprise a straight or branched alkyl, aryl, alkaryl, or aralkyl group containing approximately 1 to approximately 40 carbon atom(s), and/or a silyl or siloxyl group containing approximately 1 to approximately 40 silicon atom(s), wherein the carbon or silicon atom(s) may be a linking group to, or part of, one or more functional groups comprising nitrites; nitro constituents; sulfoxides; sulfonates; phosphonium constituents; phosphonates; phosphonites; ammonium constituents; viologens, including bipyridinyl constituents; carbonyls, including carbonates, carbamates; ketones; esters; and amides; ethers, including polyethers; amines, including tertiary amines; alkenes; alkynes; and mixtures thereof; wherein any remainder of R.sub.1 -R.sub.10 comprise H; and wherein M comprises a transition metal.

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First Claim