Electrochromic system

US6183878A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Horst Berneth · Leverkusen, DE
• Uwe Claussen · Leverkusen, DE
• Dietrich Haarer · Bayreuth, DE
• Jochen Schaller · Lenggries, DE
• Jurgen Simmerer · Erlangen, DE

Key dates

• Filing date: May 25, 1999
• Grant date: Feb 6, 2001
• Expiry date: May 25, 2019

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/12271
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

The invention concerns an electrochrome system comprising a mixture of reducible and oxidizable substances RED.sub.1 and OX.sub.2, at lest one RED.sub.1 '-OX.sub.2 ' pair being covalently interlinked via a bridge and, for at least one RED.sub.1 " or OX.sub.2 " substance, the reciprocal conversion of the oxidized form and the reduced form being brought about by the fracture or formation of a .sigma.-bond. The electrochrome system is characterized by simplified electron transfer and reduced secondary reactions.