title: Kinetics and mechanism of nanoparticles-catalyzed piperidinolysis of anionic phenyl salicylate.
abstract: The values of the relative counterion (X) binding constant R(X)(Br) (=K(X)/K(Br), where K(X) and K(Br) represent cetyltrimethylammonium bromide, CTABr, micellar binding constants of X(v-) (in non-spherical micelles), v = 1,2, and Br(-) (in spherical micelles)) are 58, 68, 127, and 125 for X(v-) = 1(-), 1(2-), 2(-), and 2(2-), respectively. The values of 15 mM CTABr/[Na(v)X] nanoparticles-catalyzed apparent second-order rate constants for piperidinolysis of ionized phenyl salicylate at 35 °C are 0.417, 0.488, 0.926, and 0.891 M(-1) s(-1) for Na(v)X = Na1, Na2 1, Na2, and Na2 2, respectively. Almost entire catalytic effect of nanoparticles catalyst is due to the ability of nonreactive counterions, X(v-), to expel reactive counterions, 3(-), from nanoparticles to the bulk water phase.
authors.affiliation: Department of Chemistry, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia.
authors.forename: Norazizah Abd
authors.identifier: 0000-0001-5867-9050
authors.initials: NA
authors.lastname: Razak
authors.affiliation: Department of Chemistry, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia.
authors.forename: M Niyaz
authors.initials: MN
authors.lastname: Khan
mesh_terms: D000838:Anions / Q000737:chemistry; D002384:Catalysis; D000077286:Cetrimonium; D002593:Cetrimonium Compounds / Q000737:chemistry*; D007700:Kinetics; D008823:Micelles; D053758:Nanoparticles / Q000737:chemistry*; D010880:Piperidines / Q000737:chemistry; D012459:Salicylates / Q000737:chemistry*; D013501:Surface-Active Agents; D014867:Water / Q000737:chemistry
chemical_list: D000838:Anions; D002593:Cetrimonium Compounds; D008823:Micelles; D010880:Piperidines; D012459:Salicylates; D013501:Surface-Active Agents; D014867:Water; C026041:phenyl salicylate; D000077286:Cetrimonium