thermodynamically reversible and furnishing a platinum electrode with a well defined potential. It is shown that these new dyes have the structure of dihydroxyfluorene quinones and diaminofluorene quinones; they are the first fluorene quinones ever described in literature. Several of these substituted fluorene quinones have been obtained in a pure, crystalline state and are characterized by analysis,
源自
邻苯二酚的四羟基三苯
甲烷化合物(
金黄色
染料及其还原产物)很容易转化为深色,可以还原为无色无色化合物,还原和再氧化在热力学上是可逆的,并为
铂电极提供了明确的电位。结果表明,这些新型
染料具有二羟基
芴醌和二
氨基
芴醌的结构。它们是文献中首次描述的
芴醌。这些取代的
芴醌中的几种已经以纯净的结晶态获得,并通过分析UV进行了表征。吸收光谱,红外光谱,
酸碱指示剂行为,其氧化还原电位及其形成
金属络合物的能力。