Results 71 to 80 of about 28,761 (191)

Ultrafast Intersystem Crossing in SO2 and Nucleobases [PDF]

open access: yes19th International Conference on Ultrafast Phenomena, 2014
Mixed quantum-classical dynamics simulations show that intersystem crossing between singlet and triplet states in SO$_2$ and in nucleobases takes place on an ultrafast timescale (few 100~fs), directly competing with internal conversion.
Mai, Sebastian   +3 more
openaire   +2 more sources

The interplay of different relaxation channels in the excited state dynamics of photoinitiators

open access: yesEPJ Web of Conferences, 2013
Different photoinitiators are investigated by femtosecond transient absorption spectroscopy and DFT calculations. Their initiation properties are critically governed by competition between intersystem crossing, fluorescence and internal conversion partly
Barner-Kowollik C.   +5 more
doaj   +1 more source

The phthalocyanines applications in photodynamic therapy investigated by time-resolved and steady-state photothermal methods

open access: yesInternational Journal of Photoenergy, 2002
The time-resolved photothermal methods are used in order to establish the yield of intersystem (singlet-triplet) crossing of dyes that are candidates for the application in photodynamic therapy.
Danuta Frackowiak   +4 more
doaj   +1 more source

Excited-State Dynamics of the Thiopurine Prodrug 6-Thioguanine: Can N9-Glycosylation Affect Its Phototoxic Activity?

open access: yesMolecules, 2017
6-Thioguanine, an immunosuppressant and anticancer prodrug, has been shown to induce DNA damage and cell death following exposure to UVA radiation. Its metabolite, 6-thioguanosine, plays a major role in the prodrug’s overall photoreactivity.
Brennan Ashwood   +2 more
doaj   +1 more source

Photorelaxation Pathways of 4-(N,N-Dimethylamino)-4′-nitrostilbene Upon S1 Excitation Revealed by Conical Intersection and Intersystem Crossing Networks

open access: yesMolecules, 2020
Multi-state n-electron valence state second order perturbation theory (MS-NEVPT2) was utilized to reveal the photorelaxation pathways of 4-(N,N-dimethylamino)-4′-nitrostilbene (DANS) upon S1 excitation.
Ziyue He   +4 more
doaj   +1 more source

Publisher Correction: Unexpected intersystem crossing [PDF]

open access: yesNature Chemistry, 2019
In the version of this News & Views originally published, Fig. 1b incorrectly displayed the chemical formula “CH3NHCH3”. This has been corrected to “CH3NHCH2”.
openaire   +1 more source

An MS-CASPT2 Study of the Photodecomposition of 4- Methoxyphenyl Azide. Role of Internal Conversion and Intersystem Crossing [PDF]

open access: yes, 2019
Aryl azides photochemistry is strongly dependent on the substituent relative position, as has been studied by time resolved resonant Raman (TR3) spectroscopy for 4-methoxyphenyl azide and its isomer 3-methoxyphenyl azide.
Aranda, Daniel   +5 more
core  

Enhanced intersystem crossing in core-twisted aromatics

open access: yesChemical Science, 2017
Core-twisted aromatics exhibit enhanced intersystem crossing upon photoexcitation when compared to their planar analogs.
Kalaivanan Nagarajan   +3 more
openaire   +3 more sources

Spin-enhanced organic bulk heterojunction photovoltaic solar cells

open access: yes, 2012
Recently, much effort has been devoted to improve the efficiency of organic photovoltaic solar cells based on blends of donors and acceptors molecules in bulk heterojunction architecture.
Basel, Tek P.   +6 more
core   +1 more source

Magnetic fields facilitate DNA-mediated charge transport

open access: yes, 2015
Exaggerate radical-induced DNA damage under magnetic fields is of great concerns to medical biosafety and to bio-molecular device based upon DNA electronic conductivity.
Lee, Kee Jin   +3 more
core   +2 more sources

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