REGULATION OF THE RATE OF HYDROLYSIS OF PHOSPHORUS ACID ESTERS
651
system of amphiphilic compounds as structureꢀformꢀ the action of supramolecular systems based on pyrimꢀ
ing components, a polymer component (PEI), and idinophanes, PEI, and lanthanum ions, the rate of
La(III) ions, which exhibit a homogeneous catalytic reaction can increase by three orders of magnitude, as
effect. We found that the dependence of reaction rate compared to the rate of alkaline hydrolysis of the subꢀ
constants on the concentration of APPꢀ2 was different strates.
in the APPꢀ2/PEI/SDS/La and APPꢀ2/PEI/Triton
Xꢀ100/La fourꢀcomponent systems. As СAPPꢀ2 was
ACKNOWLEDGMENTS
increased in the system containing an SDS additive,
kobs decreased by a factor of 1.5, whereas in increased
by the above factor in the system with a Triton Xꢀ100
additive (Fig. 6). It is believed that, in the latter case,
aggregates of a new type based on mixed surfactant
(APPꢀ2 + Triton Xꢀ100) micelles immobilized on a
PEI matrix were formed in the system; they accelerꢀ
ated the reaction mainly by the action of PEI amino
groups and La(III) ions.
This work was supported by the Russian Foundaꢀ
tion for Basic Research (project nos. 07ꢀ03ꢀ00392a
and 10ꢀ03ꢀ00365).
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KINETICS AND CATALYSIS Vol. 51
No. 5
2010