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.
本发明提供了一类新型的 N-取代三芳基
甲烷磺酰胺,该类磺酰胺可逆氧化成有色形式,氧化形式可逆还原成无色形式。优选的实施方案包括具有 N-芳基取代基(如
对苯二酚取代基)的呫吨磺酰胺。这些化合物具有的氧化还原电位范围在 +200 至 -500 毫伏之间,因此可用作
染料,用于产生照相、光热成像、热成像和压力诱导成像,还可用作各种
生物和
化学反应中的氧化还原指示剂。