Bipyridinium salt solutions

Details Bipyridinium salt solutions Bipyridinium salt solutions

1991-06-25

1994-03-15

Higel, Floyd D.

Compositions

Radiation sensitive

359265, 359839, 546257, 252582, C07D40104, C09K 900, G02B 530, G02F 101, G02F 1137

Patent

active

052943763

ABSTRACT:
The present invention provides solutions of certain 4,4'-bipyridinium salts, such as salts of 1,1'- dibenzyl-2,2',6,6'-tetraalkyl-4,4'-bipyridinium cations. The solutions of the invention are employed as solutions of variable transmittance in solution-phase electrochromic devices, including such devices that are single-compartment and self-erasing. In the solutions of the invention in such devices, the bipyridinium salts are cathodic electrochromic compounds, as reduction of a cation of such a salt causes its molar extinction coefficient at at least one wavelength in the visible range to increase markedly. Electrochromic devices, in which solutions of the invention provide variable transmittance, are, in turn, components of variable transmittance in display devices, windows and other types of light filters, and variable reflectance mirrors, such as those that can be used as dimmable rearview mirrors in motor vehicles.

REFERENCES:
patent: 3118891 (1964-01-01), Kramer
patent: 3340041 (1967-09-01), Homer et al.
patent: 3652149 (1972-03-01), Rogers
patent: 3697528 (1972-10-01), Andrews et al.
patent: 3856714 (1974-12-01), Moore et al.
patent: 3912368 (1975-10-01), Ponjee et al.
patent: 4841058 (1989-06-01), Endo et al.
patent: 4902108 (1990-02-01), Byker

Affiliated with

Also associated with

Rating

Bipyridinium salt solutions does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Bipyridinium salt solutions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Bipyridinium salt solutions will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1534226