Reversible redox-controlled imaging methods

Details Reversible redox-controlled imaging methods Reversible redox-controlled imaging methods

C - Chemistry, Metallurgy

09

B

C09B 11/28 (2006.01) B41M 5/136 (2006.01) B41M 5/323 (2006.01) C07D 513/10 (2006.01) C09B 15/00 (2006.01) G01N 33/52 (2006.01) G03C 1/40 (2006.01) G03C 8/10 (2006.01) G03C 8/16 (2006.01)

Patent

CA 2068381

7140-CAN REVERSIBLE REDOX-CONTROLLED IMAGING METHODS Abstract of the Disclosure A novel class of N-substituted triarylmethane sulfonamides is provided which undergo reversible oxidation into colored form and reversible reduction of the oxidized form into colorless form. Preferred embodiments comprise xanthene sulfonamides having N-aryl substituents, e.g., hydroquinone substituents. These compounds possess redox potentials ranging between about +200 to -500 millivolts and thus are useful as dyes for producing photographic, photothermographic, thermal, and pressure-induced images, as well as being useful as redox indicators in a wide variety of biological and chemical reactions.

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