TEMPERATURE DEPENDENCE OF DEACTIVATION OF EXCITED SINGLET S1 STATE OF CORROLE FREE BASES
Abstract
The NH-tautomerization in the lowest singlet S1 state of the 5,10-mesityl-15-(2,6-dichloropyrimidinyl)-corrole free base was studied in temperature range 278—318 K. It was shown that the NH-tautomerization was the dominant channel for the deactivation of the electronic excitation energy of the short wavelength T2 tautomer. The NH-tautomerization was found to cause the significant changes in quantum yields of the electronic energy deactivation of this tautomer as a function of temperature. When temperature rises up to 318 K, almost 90% of the electronic excitation energy of the corrole ensemble in the solution accumulates on the singlet S1 state of the long wavelength T1 tautomer after phototautomerization.
About the Authors
Y. H. Ajeeb
Art, Sciences, and Technology University in Lebanon; Belarusian State Technological University
Lebanon
PO Box 14-695, Beirut, Lebanon; 13а Sverdlov Str., Minsk, 220006, Belarus
Lebanon
PO Box 14-695, Beirut, Lebanon; 13а Sverdlov Str., Minsk, 220006, Belarus
T. B. Karlovich
Belarusian State Technological University
Belarus
13а Sverdlov Str., Minsk, 220006
Belarus
13а Sverdlov Str., Minsk, 220006
L. L. Gladkov
Belarusian State Academy of Communications
Belarus
Minsk, 220114
Belarus
Minsk, 220114
W. Maes
Institute for Materials Research (IMO-IMOMEC), Hasselt University
Belgium
B-3590, Diepenbeek
Belgium
B-3590, Diepenbeek
M. M. Kruk
Belarusian State Technological University
Belarus
13а Sverdlov Str., Minsk, 220006
Belarus
13а Sverdlov Str., Minsk, 220006
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Review
For citations:
Ajeeb Y.H., Karlovich T.B., Gladkov L.L., Maes W., Kruk M.M. TEMPERATURE DEPENDENCE OF DEACTIVATION OF EXCITED SINGLET S1 STATE OF CORROLE FREE BASES. Zhurnal Prikladnoii Spektroskopii. 2019;86(3):353-359. (In Russ.)
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