EFFECT OF ELECTROLYTES ON THE CATALYTIC PROPERTIES
431
field gradient on a Tesla BS-576A high-resolution
Nauk, Ser. Khim., 1993, no. 8, pp. 1396 1400.
spectrometer (100 MHz) [21].
8. Zakharova, L.Ya., Kudryavtseva, L.A., and Konova-
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The ESR spectra were recorded on an RE-1306
spectrometer in the conditions described in [22]. The
spin label was 5-doxylstearic acid (Sigma, 5 10 4 M).
9. Micellization, Solubilization, and Microemulsions,
Mittal, K.L., Ed., New York: Plenum, 1977, vol. 2,
pp. 489 507.
The kinetics of hydrolysis were studied spectro-
photometrically on a Specord M-400 instrument at
25 C, following the absorbance of the p-nitropheno-
late anion at 400 nm. The initial concentration of
10. Shagidullina, R.A., Zakharova, L.Ya., and Kudryav-
tseva, L.A., Izv. Ross. Akad. Nauk, Ser. Khim., 1999,
no. 2, pp. 279 282.
5
the substrate in the kinetic experiments was 5 10
M. The apparent pseudo-first order rate constants
11. Zakharova, L.Y., Valeeva, F.G., Kudryavtseva, L.A.,
and Konovalov, A.I., Mendeleev Commun., 2000,
vol. 10, no. 6, pp. 241 243.
(kapp) were found from the equation ln (A
A) =
kapp + const (A and A are the optical densities of
the solution at time and on the completion of the
reaction, respectively). The kapp values were calculated
by the weighted least-squared method.
12. Rusanov, A.I. and Fainerman, V.B., Dokl. Akad. Nauk
SSSR, 1989, vol. 308, no. 3, pp. 651 654.
13. Hobson, R.A., Grieser, F., and Healy, T.W., J. Phys.
Chem., 1994, vol. 98, no. 1, pp. 274 278.
Ethyl p-nitrophenyl chloromethylphosphonate (I)
and hexyl p-nitrophenyl chloromethylphosphonate
(III) were prepared by the procedure described in [23].
Pure grade dodecylpyridinium bromide (surfactant II)
was twice recrystallized from ethanol.
14. Imae, T. and Koshaka, T., J. Phys. Chem., 1992,
vol. 96, no. 24, pp. 10030 10035.
15. Cassidi, M.A. and Warr, G.G., J. Phys. Chem., 1996,
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ACKNOWLEDGMENTS
The work was financially supported by the Russian
Foundation for Basic Research (project no. 99-03-
32037a) and the Haldor Topse AG Company.
17. Fedotov, V.D., Zuev, Yu.F., Archipov, V.P., and
Idiyatullin, Z.Sh., Appl. Magn. Reson., 1996, vol. 11,
no. 1, pp. 7 17.
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RUSSIAN JOURNAL OF GENERAL CHEMISTRY Vol. 72 No. 3 2002