Abstract
The hydrolysis of 4-nitrophenylphosphate (NPP) in the presence of several cobalt(III) amine model systems in oil-in-water microemulsion media was investigated. The reaction was monitored by measuring the absorbance of the nitrophenolate ion produced in the reaction aliquots with time under the experimental condition. The order of effectiveness of the microemulsion system toward the hydrolysis of NPP was found to be cationic > anionic > aqueous. [Cotn 2 (OH)(H 2 O)] 2 + complexes were found to be better promoters of hydrolysis compared to [Coen 2 (OH)(H 2 O)] 2 + in both aqueous and microemulsion systems. Explanation for the above is afforded and the application of the systems for possible environmental decontamination of organophosphates is envisioned.
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