Polymer 4,4'-bipyridinium structures, formulations for an electrochromic active layer, and application therefor

• US 20090040589A1
• Filed: 07/10/2006
• Published: 02/12/2009
• Est. Priority Date: 07/11/2005
• Status: Abandoned Application

• Current Assignee: Siemens AG
• Original Assignee: Siemens AG
• Inventors: Kanitz, Andreas, Roth, Wolfgang
• Application Number:
  US11/988,639
• Publication Number:
  US 20090040589A1
• Time in Patent Office: Days
• US Class Current: 359/273
• CPC Class Codes: C08G 73/0627 with only one nitrogen atom in the ring
• CPC Class Codes: C09K 2211/1466 containing nitrogen as the only heteroatom
• 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

Abstract

The invention relates to material systems wherein electrochemical and/or photochemical parallel reactions are completely avoided by stabilising structural modifications, or repressed by orders of magnitude as a result of the structural modifications. The invention also relates to polymer 4,4′-bipyridinium structures, to formulations based on the structures and used for electrochromic active layers, and to the use of 4,4′-bipyridinium structures for producing organic electrochromic displays.

Claims

1. Polymer 4,4′

-bipyridinium structures that are separated from each other by alkaline spacers,

characterized in that

the alkaline spacer includes 10 to 20 carbon atoms.

2. A 4,4′

-bipyridinium structure as claimed in claim 1, with the alkaline spacer containing 12 to 16 carbon atoms.

3. A 4,4′

-bipyridinium structure as claimed in claim 1, with the alkaline spacer containing 12 carbon atoms.

4. A formulation for an electrochromic active layer,

characterized in that

it includes at least one component with a 4,4′

-bipyridinium structure with . . . as claimed in claim 1.

5. An application of a polymer 4,4′

bipyridinium structure with . . . as claimed in claim 1 for producing an electrochromic active layer.

6. An application of a polymer 4,4′

bipyridinium structure . . . as claimed in claim 1 for producing an organic electrochromic display.

7. A 4,4′

-bipyridinium structure as claimed in claim 2, with the alkaline spacer containing 12 carbon atoms.

8. A formulation for an electrochromic active layer,

characterized in that

it includes at least one component with a 4,4′

-bipyridinium structure with . . . . Claim 2.

9. A formulation for an electrochromic active layer,

characterized in that

it includes at least one component with a 4,4′

-bipyridinium structure with . . . . Claim 3.

10. An application of a polymer 4,4′

bipyridinium structure with . . . as claimed in claim 2 for producing an electrochromic active layer.

11. An application of a polymer 4,4′

bipyridinium structure with . . . as claimed in claim 3 for producing an electrochromic active layer.

12. An application of a polymer 4,4′

bipyridinium structure with . . . as claimed in claim 4 for producing an electrochromic active layer.

13. An application of a polymer 4,4′

bipyridinium structure . . . as claimed in claim 2 for producing an organic electrochromic display.

14. An application of a polymer 4,4′

bipyridinium structure . . . as claimed in claim 3 for producing an organic electrochromic display.

15. An application of a polymer 4,4′

bipyridinium structure . . . as claimed in claim 4 for producing an organic electrochromic display.