Kinetics of the alkaline hydrolysis of crystal violet in aqueous solution influenced by anionic surfactants

Abstract EN

Kinetics of the alkaline hydrolysis of crystal violet, a carbocationic dye, in aqueous solution has been investigated with and without the addition of two anionic surfactants, sodium dodecylbenzene sulfonate (SDBS), and sodium dodecyl sulfate (SDS).

SDS has a larger CMC value compared to SDBS in aqueous solution and the CMC value of both of the surfactants exhibits dependence on temperature and concentration of an added electrolyte (NaCl).

The title reaction is inhibited by both of SDS and SDBS in aqueous solution at different extent both below and above CMC.

Crystal violet has also been found to interact strongly with both of SDS and SDBS and the dye-surfactant interaction also depends on the structure of the surfactants.

Attempts have been made to correlate changes in the surfactant properties and dye-surfactant interaction depending on the structure of the surfactants with the inhibition of the title reaction in aqueous solution.