Adducts of ketonic compounds with the anions of oxygenated acids, process for their preparation, their use and azo ketonic compounds.

摘要

Ketonic compounds, in which at least one strongly electron- withdrawing substituent is bonded to the carbon atom in the neighbouring position to the ketonic group and/or in which a pi -electron system is conjugated to the carbon-oxygen double bond of the ketonic group, have the capability to interact selectively with the anions of oxygenated acids, adducts, chelates or complexes being formed. …If the ketonic group is part of a chromophore in the corresponding ketonic compounds, a shift of the absorption in the visible or ultraviolet light region occurs on the formation of the adduct with the anions of the oxygenated acids. …The corresponding ketonic compounds can be used to detect the anions of the oxygenated acids, for example as an ion-sensitive component of an ion-sensitive part or as colour indicators.