274
MCHEDLOV-PETROSYAN
dynamic dissociation constant of HCl and f values of
14. Martin, M.M., Chem. Phys. Lett., 1975, vol. 35,
no. 1, p. 105.
15. Martin, E., Pardo, A., Guijarro, M.S., and Fernandez-
Alonso, J.I., J. Mol. Struct., 1986, vol. 142, p. 197.
ions. The pKa, 0 value calculated by this procedure
5
at a Fluorescein concentration of 1.40 10
M
5
and HCl concentrations of 2.3 10 to 0.0113 M
3.34 0.07) differed from the value 3.28 0.06 deter-
(
1
1
1
1
2
2
6. Seybold, P.G., Gouterman, M., and Callis, J.,
Photochem. Photobiol., 1969, vol. 9, no. 3, p. 229.
7. Orndorff, W.R., Gibbs, R.C., and Shapiro, C.V.,
J. Am. Chem. Soc., 1928, vol. 50, no. 3, p. 819.
8. Ramart-Lucas, P., C.R. Acad. Sci., Ser. C, 1937,
vol. 205, p. 1409.
9. Kolthoff, I.M., Chantooni, M.K., and Bhowmik, S.,
Anal. Chem., 1967, vol. 39, no. 3, p. 315.
0. Mchedlov-Petrosyan, N.O., Dokl. Akad. Nauk SSSR,
mined on the assumption that dissociation of HCl is
+
complete. When consumption of H ions for protona-
tion of the dye was taken into consideration, the pKa, 0
value changed by less than 0.01 unit.
ACKNOWLEDGMENTS
The author is grateful to L.V. Vasetskaya and
V.I. Kukhtik for their help in performing experiments.
1
987, vol. 293, no. 5, p. 1178.
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