Charge transfer salts and uses thereof

US5179467A · kind A · utility

Assignee

• International Business Machines Corporation · US

Inventors

• Stephen L. Buchwalter · Hopewell Junction, US
• Martin J. Goldberg · Saratoga, US
• Revathi Iyengar · Peekskill, US
• Terrence R. O'Toole · Webster, US
• Alfred Viehbeck · Austin, US

Key dates

• Filing date: Sep 17, 1990
• Grant date: Jan 12, 1993
• Expiry date: Sep 17, 2010

Classification

• Technology area (CPC H): Electricity
• CPC primary: H01B1/12
• WIPO field: Electrical machinery, apparatus, energy
• WIPO sector: Electrical engineering

Abstract

An electrochemical color change cell incorporating as a color changing agent intramolecular charge transfer salt or an intermolecular charge transfer salt. The intermolecular charge transfer salts and the intramolecular charge transfer salts have a plurality of oxidation states and a wide variation in color change. The intermolecular and intramolecular charge transfer salts preferably contain a violene moiety and a moiety having a carbonyl group conjugated to an aromatic moiety. The intramolecular charge transfer salts have a stable covalent radical-anion/radical-cation configuration. The intermolecular charge transfer salts have a stable ionic radical-anion/radical-cation configuration.