ELECTROCHEMICHROMIC VIOLOGENS

• US 20010022357A1
• Filed: 06/05/1997
• Published: 09/20/2001
• Est. Priority Date: 11/29/1989
• Status: Abandoned Application

• Current Assignee: Desaraju V. Varaprasad, Hamid R. Habibi, Niall R. Lynam, Padma Desaraju
• Original Assignee: Desaraju V. Varaprasad, Hamid R. Habibi, Niall R. Lynam, Padma Desaraju
• Inventors: VARAPRASAD, DESARAJU V., LYNAM, NIALL R., DESARAJU, PADMA, HABIBI, HAMID R.
• Application Number:
  US08/868,966
• Publication Number:
  US 20010022357A1
• Time in Patent Office: Days
• US Class Current: 252/583
• CPC Class Codes: C09K 9/02 Organic tenebrescent materials
• CPC Class Codes: G02F 1/1503 caused by oxidation-reduction reactions in organic liquid solutions, e.g. viologen solutions
• CPC Class Codes: G02F 1/161 Gaskets; Spacers; Sealing of cells; Filling or closing of cells
• CPC Class Codes: G02F 2001/1502 complementary cell
• CPC Class Codes: G02F 2001/15145 the electrochromic layer comprises a mixture of anodic and cathodic compounds

Abstract

An electrochemichromic solution containing novel viologen salts as cathodic materials for the redox pair.

Claims

1. An electrochemichromic solution comprising:

a solvent;

a redox chemical pair comprising a cathodic material and an anodic material, wherein said cathodic material is selected from one of the following viologen compounds;

wherein X⁻

is an anion.

2. An electrochemichromic solution according to

claim 1

, wherein said anion is selected from a group consisting of tetrafluoroborate, perchlorate, trifluoromethane sulfonate, hexafluorophosphate, and hexafluoroarsenate.

3. An electrochemichromic solution according to

claim 1

, wherein said viologen compound is

4. A viologen salt having one of the following chemical formulae.

wherein X⁻

is an anion.