Results 81 to 90 of about 28,603 (262)
Advanced Optical Materials, EarlyView.Electrically pumped organic lasing thresholds are lowered by mitigating triplet accumulation through a tailored host‐guest system. Integrating the multi‐resonant TADF emitter DABNA‐2 into a triplet‐scavenging BSBCz host suppresses singlet‐triplet annihilation.
Adam Bickerdike +6 more
wiley +1 more source
Molecules, 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
Spin Photochemistry: Electron Spin Multiplicity as a Tool for Reactivity and Selectivity Control
CHIMIA, 2021 Spin chemistry involving small organic molecules without heavy atoms is highly sensitive to spin-orbit-coupling (SOC) modulating biradical conformation as well as hyperfine coupling (HFC) modulating magnetic isotope interactions. Several easily available
Axel G. Griesbeck, Seyma Bozkus
doaj +1 more source
Understanding H-aggregates crystallization induced emissive behavior: insights from theory
Scientific Reports, 2023 We conducted a theoretical investigation into how the molecular stacking effect impacts the photophysical properties in solid phases. Our findings indicated that in the aggregated state, the out-of-plane distorted vibration and imidazole ring stretching ...
Huixue Li +4 more
doaj +1 more source
Optical polarization of nuclear ensembles in diamond
, 2013 We report polarization of a dense nuclear-spin ensemble in diamond and its dependence on magnetic field and temperature. The polarization method is based on the transfer of electron spin polarization of negatively charged nitrogen vacancy color centers ...
Budker, Dmitry +3 more
core +1 more source
Ultrafast Intersystem Crossing in SO2 and Nucleobases [PDF]
19th 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
Advanced Optical Materials, EarlyView.All‐organic channel‐layer OFETs are shown to enable visible‐light photoprogramming via triplet‐sensitized diarylethene switching. Preferential localization of the photoswitch and organic sensitizer in intercrystalline amorphous domains preserves polymer crystalline packing while ensuring short‐range Dexter‐type triplet–triplet energy transfer and solid‐
Jieun Kwon +10 more
wiley +1 more source
The interplay of different relaxation channels in the excited state dynamics of photoinitiators
EPJ 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
Localization-dependent charge separation efficiency at an organic/inorganic hybrid interface
, 2016 By combining complementary optical techniques, photoluminescence and time-resolved excited state absorption, we achieve a comprehensive picture of the relaxation processes in the organic/inorganic hybrid system SP6/ZnO. We identify two long-lived excited
Bogner, Lea +3 more
core +1 more source
Advanced Science, EarlyView.Liposomal nanoconfinement converts the hemicyanine photosensitizer RhM from Type‐II to Type‐I photodynamic therapy (PDT) while enhancing photothermal therapy (PTT). The RhM‐R837@Lip nanoassembly efficiently generates superoxide (O2•−) and hydroxyl radicals (•OH) to kill tumor cells and achieve tumor ablation.
Minglu Zhang +14 more
wiley +1 more source