24886-86-0Relevant academic research and scientific papers
Kinetics of alkaline hydrolysis of esters of phosphorus acids in micellar and hexagonal phases in the cetyldimethylethylammonium bromide - NaOH - Water system
Bakeeva,Kudryavtseva,Eme,Kosacheva,Bel'skii,Kudryavtsev,Shagidullin,Sopin
, p. 1454 - 1459 (1998)
The influence of micellar (Mi) and hexagonal (E) mesophases of the cetyldimethylethylammonium bromide-NaOH-water system (I) on the rates of alkaline hydrolysis of O-p-nitrophenyl-O,O-diethyl phosphate (2), O-p-nitrophenyl-O-ethylethyl phosphonate (3), and O,O-di(p-nitrophenyl)methyl phosphonate (4) was studied by UV spectrophotometry. The binding constants of the substrates, critical micelle concentrations, and rate constants of reactions in the micellar phase were determined. In micellar solutions of system I, a tenfold increase in the rates of alkaline hydrolysis of 2-4 was observed. An increase in the degree of medium ordering during the formation of the E-phase results in a twofold acceleration of alkaline hydrolysis of 2 and 3 and in the inhibition of this process in the case of 4.
Supramolecular systems based on aminomethylated calix[4]resorcinarene and a cationic surfactant: Catalysts of the hydrolysis of esters of phosphorus acids
Kashapov,Pashirova,Zhiltsova,Lukashenko,Ziganshina,Zakharova
scheme or table, p. 200 - 204 (2012/03/12)
Kinetics of alkaline hydrolysis of 4-nitrophenyl esters of tetracoordinated phosphorus acids in micellar solutions of aminomethylated calix[4]resorcinarene containing sulfonatoethylene groups on the lower rim of the macrocycle, 4-aza-1-hexadecyl-azoniabicyclo[2.2.2]octane bromide and their mixtures was investigated spectrophotometrically. It is established that the catalytic effect of aggregates depends on the concentration of calixarene and surfactants, pH, presence of lanthanum salt and reaches more than two orders of magnitude. The parameters of the catalyzed reactions and their dependence on the composition are determined.
Structure and properties of water-oil microemulsions
Mirgorodskaya,Kudryavtseva,Zuev,Idiyatullin,Fedotov
, p. 1007 - 1011 (2007/10/03)
The parameters determining the structure and properties (surface potential and size of microdrops) of oil-water microemulsions containing various surfactants, and also the distribution of components between the dispersed phase and dispersing medium were d
Cetylpyridinium bromide-based oil-in-water microemulsions as a medium for hydrolysis of esters of phosphorus acids in the presence of primary amines
Mirgorodskaya,Kudryavtseva,Zuev,Idiyatullin,Fedotov
, p. 245 - 249 (2007/10/03)
High-resolution 1H NMR technique with Fourier-transform and pulsed-gradient spin-echo was used to study the structure of oil-in-water microemulsions based on cetylpyridinium bromide. The sizes of microdrops and the distribution of components between the disperse and continuous phases were found. It was shown for the hydrolytic decomposition of O,O-bis-(p-nitrophenyl) methyl phosphonate in the presence of amines that the microemulsion medium can affect both the rate and mechanism of hydrolysis. The reaction rate constants depend on the structure of microdrops.
