Nucleophilic Dephosphorylation of p-Nitrophenyl Diphenyl Phosphate in Cationic Micellar Media
The kinetics of nucleophilic dephosphorylation of p-nitrophenyl diphenyl phosphate by hydroxamate ions (R‘(CO)N(RO-)) have been investigated in aqueous cationic micellar media at pH 9.12 and 27 °C. The pseudo-first-order rate constant-surfactant profiles show micelle-assisted bimolecular reactions...
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| Veröffentlicht in: | Langmuir 2005-09, Vol.21 (19), p.8664-8669 |
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| container_issue | 19 |
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| container_title | Langmuir |
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| creator | Ghosh, Kallol K Sinha, Daliya Satnami, Manmohan L Dubey, D. K Rodriguez-Dafonte, P Mundhara, G. L |
| description | The kinetics of nucleophilic dephosphorylation of p-nitrophenyl diphenyl phosphate by hydroxamate ions (R‘(CO)N(RO-)) have been investigated in aqueous cationic micellar media at pH 9.12 and 27 °C. The pseudo-first-order rate constant-surfactant profiles show micelle-assisted bimolecular reactions involving interfacial ion exchange between bulk aqueous media and micellar pseudophase. N-Substituted hydroxamate ion shows higher reactivity over the unsubstituted hydroxamate ions in cationic micellar media. The kinetic data are discussed in terms of the pseudophase ion exchange model. |
| doi_str_mv | 10.1021/la051223b |
| format | Article |
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The kinetic data are discussed in terms of the pseudophase ion exchange model.</description><subject>Cations - chemistry</subject><subject>Chemistry</subject><subject>Colloidal state and disperse state</subject><subject>Exact sciences and technology</subject><subject>General and physical chemistry</subject><subject>Hydrogen-Ion Concentration</subject><subject>Hydroxamic Acids - chemistry</subject><subject>Kinetics</subject><subject>Micelles</subject><subject>Micelles. Thin films</subject><subject>Models, Chemical</subject><subject>Molecular Structure</subject><subject>Nitro Compounds - chemistry</subject><subject>Phosphates - chemistry</subject><subject>Phosphorylation</subject><subject>Stereoisomerism</subject><subject>Water - chemistry</subject><issn>0743-7463</issn><issn>1520-5827</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2005</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNpt0E1v1DAQBmALgehSOPAHUC4gcQj4YxzbR9hSiuiWShRuyHKSseriTYKdSN1_T9iNuhcOI4_kR69GLyEvGX3HKGfvo6OScS7qR2TFJKel1Fw9JiuqQJQKKnFCnuV8Ryk1AsxTcsIqBtyAXJFfV1MTsR9uQwxNcYbDbZ_nSbvoxtB3Re-LobwKY5oJdrtYnIVlud5LN2IRumK913PCJjQYo0vFBtvgnpMn3sWML5b3lPw4_3Szvigvv33-sv5wWTqh2Vh6w5TRqFvhq1pgTWvkAK1qHGcehXNeA_iaykpBayhIqAy0LYAB10qJ4pS8OeQOqf8zYR7tNuT9IR32U7aVllIa4DN8e4BN6nNO6O2QwtalnWXU_uvSPnQ521dL6FRvsT3KpbwZvF6Ay42LPrmuCfnoFKNaazq78uBCHvH-4d-l37ZSQkl7c_3dXnw1cvNTf7TVMdc12d71U-rm7v5z4F-LvZd5</recordid><startdate>20050913</startdate><enddate>20050913</enddate><creator>Ghosh, Kallol K</creator><creator>Sinha, Daliya</creator><creator>Satnami, Manmohan L</creator><creator>Dubey, D. 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Thin films</topic><topic>Models, Chemical</topic><topic>Molecular Structure</topic><topic>Nitro Compounds - chemistry</topic><topic>Phosphates - chemistry</topic><topic>Phosphorylation</topic><topic>Stereoisomerism</topic><topic>Water - chemistry</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Ghosh, Kallol K</creatorcontrib><creatorcontrib>Sinha, Daliya</creatorcontrib><creatorcontrib>Satnami, Manmohan L</creatorcontrib><creatorcontrib>Dubey, D. K</creatorcontrib><creatorcontrib>Rodriguez-Dafonte, P</creatorcontrib><creatorcontrib>Mundhara, G. 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L</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Nucleophilic Dephosphorylation of p-Nitrophenyl Diphenyl Phosphate in Cationic Micellar Media</atitle><jtitle>Langmuir</jtitle><addtitle>Langmuir</addtitle><date>2005-09-13</date><risdate>2005</risdate><volume>21</volume><issue>19</issue><spage>8664</spage><epage>8669</epage><pages>8664-8669</pages><issn>0743-7463</issn><eissn>1520-5827</eissn><coden>LANGD5</coden><abstract>The kinetics of nucleophilic dephosphorylation of p-nitrophenyl diphenyl phosphate by hydroxamate ions (R‘(CO)N(RO-)) have been investigated in aqueous cationic micellar media at pH 9.12 and 27 °C. The pseudo-first-order rate constant-surfactant profiles show micelle-assisted bimolecular reactions involving interfacial ion exchange between bulk aqueous media and micellar pseudophase. N-Substituted hydroxamate ion shows higher reactivity over the unsubstituted hydroxamate ions in cationic micellar media. 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| subjects | Cations - chemistry Chemistry Colloidal state and disperse state Exact sciences and technology General and physical chemistry Hydrogen-Ion Concentration Hydroxamic Acids - chemistry Kinetics Micelles Micelles. Thin films Models, Chemical Molecular Structure Nitro Compounds - chemistry Phosphates - chemistry Phosphorylation Stereoisomerism Water - chemistry |
| title | Nucleophilic Dephosphorylation of p-Nitrophenyl Diphenyl Phosphate in Cationic Micellar Media |
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