Reversible redox-controlled imaging method

Details Reversible redox-controlled imaging method Reversible redox-controlled imaging method

1993-06-11

1994-07-26

Chea, Thorl

Radiation imagery chemistry: process, composition, or product th

Dye image from radiation sensitive dye or dye former by dry...

430224, 430242, 430243, 430342, 430343, 430955, 503218, G03C 172

Patent

active

053326547

ABSTRACT:
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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Carpenter, J. W., and Lauf, P. W., "Photothermographic Silver Halide Systems", Research Disclosure, No. 17029, Jun. 1978.

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