HYDROLYSIS OF 4-NITROPHENYL DIPHENYL PHOSPHATE ASSISTED BY TETRAMINECOBALT(III) IN MICROEMULSION MEDIA

摘要

Reactions of hydroxoaquatetraminecobalt(III) in microemulsion media towards hydrolysis of 4-nitrophenyl diphenyl phosphate (NPDPP) were investigated at 10(-4) M concentration in several oil-in-water microemulsions. The reactions were monitored by measuring the absorbance of the nitrophenolate ion produced in the reaction aliquots with time. The amount of nitrophenolate ion was then determined from a calibration curve and the percentage hydrolysis calculated. The order of effectiveness of the N-4 ligand in Co(III)(N-4)(aq) complexes at pH 6.5 towards hydrolysis of NPDPP was found to be trpn > (tn)(2) > (en)(2) (where trpn is tris(3-aminopropyl)amine, tn is trimethylenediamine, and en is ethylenediamine). The possible application of the above systems to environmental clean-up problems is discussed. [References: 18]