Tieffarbige Fluorenchinone
- 1 January 1960
- journal article
- research article
- Published by Wiley in Helvetica Chimica Acta
- Vol. 43 (4) , 1086-1112
- https://doi.org/10.1002/hlca.19600430418
Abstract
Tetrahydroxytriphenylmethane compounds (aurine dyes and their reduction products) deriving from pyrocatechol are converted easily into deeply coloured substances which can be reduced to colourless leuco‐compounds, the reduction and re‐oxidation being 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, UV. absorption spectra, IR.‐spectra, acid‐base indicator behaviour, their oxidation‐reduction potential and their ability to form metal complexes.Keywords
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