Catalytic hydrolysis of phosphate esters in microemulsions |
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| Authors: | Barry L Knier H Dupont Durst Beth A Burnside Raymond A Mackay Frederick R Longo |
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| Institution: | (1) Research Directorate, Chemical Research, Development and Engineering Center, 21010-5423 Aberdeen Proving Grounds, Maryland;(2) Department of Chemistry, University of Puerto Rico, Rio Piedras Campus, 00931-3346 Rio Piedras, Puerto Rico;(3) Department of Chemistry, Drexel University, 19104 Philadelphia, Pennsylvania |
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| Abstract: | We have continued our kinetics investigation of the iodosobenzoate (IBA) catalysis of the hydrolysis of p-nitrophenyl diphenyl phosphate (PNDP), in microemulsion media composed of hexadecane in water stabilized by cetyltrimethylammonium bromide and 1-butanol over a range of water mass fractions. We have examined two iodosobenzoic acid derivatives (5-nitro-2-iodosobenzoic acid and 5-octyloxy-2-iodosobenzoic acid) as catalysts. In addition, we have determined by31P FT-NMR techniques that the major product of the hydrolysis of PNDP, both in IBA catalyzed and in uncatalyzed media, is diphenylphosphate. |
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| Keywords: | Kinetics mechanism catalysis microemulsion surfactant phosphate esters iodosobenzoate cetyltrimethylammonium bromide |
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