Electrochromic system
AssigneeBayer Aktiengesellschaft
InventorsHorst Berneth, Uwe Claussen, Dietrich Haarer, Jochen Schaller, Jürgen Simmerer
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Abstract
The invention concerns an electrochrome system comprising a mixture of reducible and oxidizable substances RED1 and OX2, at lest one RED1′-OX2′ pair being covalently interlinked via a bridge and, for at least one RED1″ or OX2″ substance, the reciprocal conversion of the oxidized form and the reduced form being brought about by the fracture or formation of a σ-bond. The electrochrome system is characterized by simplified electron transfer and reduced secondary reactions.
Claims14
An electrochromic system comprising oxidizable substances RED1 which, by releasing electrons at an anode, are converted from a weakly colored or colorless form into a colored form OX1, and reducible substances OX2 which, by accepting electrons at a cathode, are converted from a weakly colored or colorless form into a colored form RED2, the absorbance in the visible region of the spectrum increasing in each of these cases, and the weakly colored or colorless form being recovered in each case after charge equalization, wherein the substances RED1 and OX2 are a mixture comprising at least one couple RED1′/OX2′ which is linked covalently to one another via a bridge and at least one substance RED1″ or OX2″ in which the reciprocal conversion of oxidized and reducible form takes place by a σ bond being broken or formed.
Dependencies are inferred from the claim text.