Migration of Excitation Energy in Furocoumarins

O. N. Tchaikovskaya; N. G. Dmitrieva; E. N. Bocharnikova; V. S. Chaidonova; P. V. Avramov

doi:10.3389/fchem.2021.754950

Migration of Excitation Energy in Furocoumarins

O. N. Tchaikovskaya, N. G. Dmitrieva, E. N. Bocharnikova, V. S. Chaidonova, P. V. Avramov

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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 λ_em = 308 nm) with parameters Δλ = 5–10 nm, W_peak = 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.

Original language	English
Article number	754950
Journal	Frontiers in Chemistry
Volume	9
DOIs	https://doi.org/10.3389/fchem.2021.754950
State	Published - 4 Nov 2021

Keywords

furocoumarin
luminescence
photodynamic activity
singlet-singlet transition
triplet-triplet transition

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10.3389/fchem.2021.754950

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title = "Migration of Excitation Energy in Furocoumarins",

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.",

keywords = "furocoumarin, luminescence, photodynamic activity, singlet-singlet transition, triplet-triplet transition",

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doi = "10.3389/fchem.2021.754950",

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T1 - Migration of Excitation Energy in Furocoumarins

AU - Tchaikovskaya, O. N.

AU - Dmitrieva, N. G.

AU - Bocharnikova, E. N.

AU - Chaidonova, V. S.

AU - Avramov, P. V.

PY - 2021/11/4

Y1 - 2021/11/4

N2 - 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.

AB - 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.

KW - furocoumarin

KW - luminescence

KW - photodynamic activity

KW - singlet-singlet transition

KW - triplet-triplet transition

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VL - 9

JO - Frontiers in Chemistry

JF - Frontiers in Chemistry

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ER -

Migration of Excitation Energy in Furocoumarins

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Keywords

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