Premium
Catalytic destruction of paraoxon by metallomicelle layers of Co(II) and Cr(III)
Author(s) -
Hafiz A. A.,
El Awadi M. Y.,
Badawi A. M.,
Mokhar S. M.
Publication year - 2005
Publication title -
journal of surfactants and detergents
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.349
H-Index - 48
eISSN - 1558-9293
pISSN - 1097-3958
DOI - 10.1007/s11743-005-349-z
Subject(s) - paraoxon , chemistry , cationic polymerization , catalysis , nerve agent , phosphate , inorganic chemistry , substrate (aquarium) , cobalt , micelle , medicinal chemistry , nuclear chemistry , organic chemistry , enzyme , acetylcholinesterase , oceanography , geology , aqueous solution
Two micellized ion complexes, Co(II) and Cr(III), were synthesized and found to possess good catalytic activity in cleaving the paraoxon/cobalt (chromate) complex phosphate ester. The complexes orm metallomicelles, which bind the substrate by coordinating with the phosphorus in the paraoxon (which is chemically similar to the nerve agents sarin and soman). Possible reasons for the acceleration include enhanced electrophilicity of the micellized metals, enhanced surface activity, and the recognized ability of cationic micelles to accelerate the cleavage of phosphate ester. The results of kinetic data (half‐lives) for paraoxon degradation were 16.5 and 28.9 min in the presence of Co(II) and Cr(III) metallomicelle layers, respectively. The higher the value of the stability constant, the more stable the Co(II) and Cr(III) complexes.