Results 181 to 190 of about 1,254,309 (209)
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The Journal of Physical Chemistry B, 2015
Electron donor-connecting cationic porphyrins meso-(1-naphthyl)-tris(N-methyl-p-pyridinio)porphyrin (1-NapTMPyP) and meso-(2-naphthyl)-tris(N-methyl-p-pyridinio)porphyrin (2-NapTMPyP) were designed and synthesized. DFT calculations speculate that the photoexcited states of 1- and 2-NapTMPyPs can be deactivated via intramolecular electron transfer from ...
Kazutaka, Hirakawa +2 more
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Electron donor-connecting cationic porphyrins meso-(1-naphthyl)-tris(N-methyl-p-pyridinio)porphyrin (1-NapTMPyP) and meso-(2-naphthyl)-tris(N-methyl-p-pyridinio)porphyrin (2-NapTMPyP) were designed and synthesized. DFT calculations speculate that the photoexcited states of 1- and 2-NapTMPyPs can be deactivated via intramolecular electron transfer from ...
Kazutaka, Hirakawa +2 more
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The Journal of Physical Chemistry Letters, 2021
Noncovalent interaction between small molecules can generate a charge-transfer (CT) state, achieving the effect of a conjugated large molecule as well as a transition-metal complex. Herein, we demonstrate a room-temperature stable dianion biradical conveniently produced by noncovalent intermolecular CT interaction between anthraquinone (AQ) and ...
Guanheng Huang +7 more
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Noncovalent interaction between small molecules can generate a charge-transfer (CT) state, achieving the effect of a conjugated large molecule as well as a transition-metal complex. Herein, we demonstrate a room-temperature stable dianion biradical conveniently produced by noncovalent intermolecular CT interaction between anthraquinone (AQ) and ...
Guanheng Huang +7 more
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Organic & Biomolecular Chemistry
Herein, a novel transition-metal-free thiol-based donor–acceptor organophotocatalyst-assisted, singlet-oxygen-mediated tandem oxidative cyclization for the synthesis of substituted oxazoles in moderate-to-good yields is described.
Selvaraj Elavarasan +4 more
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Herein, a novel transition-metal-free thiol-based donor–acceptor organophotocatalyst-assisted, singlet-oxygen-mediated tandem oxidative cyclization for the synthesis of substituted oxazoles in moderate-to-good yields is described.
Selvaraj Elavarasan +4 more
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Journal of Experimental and Theoretical Physics, 2008
The generation of singlet oxygen is investigated and its concentration upon photoexcitation of silicon nanocrystals in porous silicon layers is determined using electron paramagnetic resonance spectroscopy. The relaxation times of spin centers, i.e., silicon dangling bonds, in vacuum and in an oxygen atmosphere in the dark and under illumination of the
E. A. Konstantinova +2 more
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The generation of singlet oxygen is investigated and its concentration upon photoexcitation of silicon nanocrystals in porous silicon layers is determined using electron paramagnetic resonance spectroscopy. The relaxation times of spin centers, i.e., silicon dangling bonds, in vacuum and in an oxygen atmosphere in the dark and under illumination of the
E. A. Konstantinova +2 more
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Generation of Singlet Oxygen by Photoexcited Au25(SR)18 Clusters
Chemistry of Materials, 2014The generation of highly reactive singlet oxygen (1O2) is of major importance for a variety of applications such as photodynamic therapy (PDT) for cancer treatment, water treatment, catalytic oxidation, and others. Herein, we demonstrate that 1O2 can be efficiently produced through the direct photosensitization by Au25(SR)18– clusters (H−SR ...
Hideya Kawasaki +7 more
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The Journal of Physical Chemistry A, 2020
The formation of singlet oxygen 1O2 provided by the photoexcitation of the encounter complexes of isoprene with oxygen (C5H8-O2) in the gas phase within the spectral region 253.5-355 nm has been observed at the elevated pressure of oxygen. Singlet oxygen has been detected with its NIR luminescence centered near 1.27 μm.
Alexandra P. Pyryaeva +3 more
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The formation of singlet oxygen 1O2 provided by the photoexcitation of the encounter complexes of isoprene with oxygen (C5H8-O2) in the gas phase within the spectral region 253.5-355 nm has been observed at the elevated pressure of oxygen. Singlet oxygen has been detected with its NIR luminescence centered near 1.27 μm.
Alexandra P. Pyryaeva +3 more
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Singlet Oxygen Generation by Photoexcitation of Gold Nanoparticles
High Energy Chemistry, 2023R. R. Safin +3 more
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The Journal of Physical Chemistry A, 2012
The mechanism and spectral dependence of the quantum yield of singlet oxygen O(2)(a (1)Δ(g)) photogenerated by UV radiation in gaseous oxygen at elevated pressure (32-130 bar) have been experimentally investigated within the 238-285 nm spectral region overlapping the range of the Wulf bands in the absorption spectrum of oxygen.
Aleksandra P, Trushina +3 more
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The mechanism and spectral dependence of the quantum yield of singlet oxygen O(2)(a (1)Δ(g)) photogenerated by UV radiation in gaseous oxygen at elevated pressure (32-130 bar) have been experimentally investigated within the 238-285 nm spectral region overlapping the range of the Wulf bands in the absorption spectrum of oxygen.
Aleksandra P, Trushina +3 more
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Singlet oxygen production from photoexcited nitrogen dioxide
Environmental Science & Technology, 1972T. C. Frankiewicz, R. S. Berry
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Singlet molecular oxygen production from photoexcited NO2
Environmental Science & Technology, 1972Theodore Frankiewicz, R. Stephen Berry
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