Migration of excitation energy in furocoumarins O. N. Tchaikovskaya, N. G. Dmitrieva, E. N. Bocharnikova [et al.]
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ArticleContent type: Текст Media type: электронный Subject(s): фурокумарины | люминесценция | фотодинамическая активность | триплет-триплетный переход | синглет-синглетный переходGenre/Form: статьи в журналах Online resources: Click here to access online
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Frontiers in chemistry Vol. 9. P. 754950 (1-10)Abstract: The migration of excitation energy of a number of psoralen compounds has been studied. For this, the methods of induced absorption spectroscopy, stationary electron spectroscopy, fluorescence and phosphorescence, as well as quantum chemistry were used. A comparative photostability of psoralen was achieved by exposure to a XeCl excilamp irradiation (emission wavelength λem 308 nm) with parameters Δλ 5–10 nm, Wpeak 18 mW/cm2 , p 8.1 J/cm3 , f 200 kHz, pulse duration 1 μs. It was found that the singlet-triplet transition played a major role in the migration of excitation energy into triplet states. Among all tested compounds, substances with an OCH3-group in the structure have the strongest effect on the spectral-luminescent characteristics.
Библиогр.: с. 9-10
The migration of excitation energy of a number of psoralen compounds has been studied. For this, the methods of induced absorption spectroscopy, stationary electron spectroscopy, fluorescence and phosphorescence, as well as quantum chemistry were used. A comparative photostability of psoralen was achieved by exposure to a XeCl excilamp irradiation (emission wavelength λem 308 nm) with parameters Δλ 5–10 nm, Wpeak 18 mW/cm2 , p 8.1 J/cm3 , f 200 kHz, pulse duration 1 μs. It was found that the singlet-triplet transition played a major role in the migration of excitation energy into triplet states. Among all tested compounds, substances with an OCH3-group in the structure have the strongest effect on the spectral-luminescent characteristics.
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