Results 51 to 60 of about 509,189 (338)

Intramolecular Down‐ and Up‐Conversion in Dimeric Tetracene Complexes Centered via Platinum(II) and Palladium(II)

Advanced Functional Materials, EarlyView.
Metal‐tetracene dimeric complexes are synthesized through the pyridyl coordination to either Pt(II) or Pd(II). Photophysical properties are systematically compared as a function of the metal using steady‐state and time‐resolved spectroscopy. The Pt(II) dimer exhibits efficient intramolecular singlet fission and subsequent intramolecular up‐conversion ...
Yifan Bo, Yuxuan Hou, Melchor Matabuena, Rik R. Tykwinski, Dirk M. Guldi   +4 more
wiley   +1 more source

Combined Machine Learning and Physics-Based Forecaster for Intra-day and 1-Week Ahead Solar Irradiance Forecasting Under Variable Weather Conditions [PDF]

, 2023
Hugo Riggs, Shahid Tufail, Mohd Tariq, Arif I. Sarwat   +3 more
openalex   +1 more source

Atmospheric fluctuations below 0.1 Hz during drift-scan solar diameter measurements

, 2011
Measurements of the power spectrum of the seeing in the range 0.001-1 Hz have been performed in order to understand the criticity of the transits' method for solar diameter monitoring.Comment: 3 pages, 3 figures, proc.
A. Raponi, C. Sigismondi, G. De Rosi, Gething, L. Negrini, M. Bianda, M. Caccia, M. Maspero, R. Ramelli, Wittmann, X. Wang   +10 more
core   +1 more source

Cu‐Based MOF/TiO2 Composite Nanomaterials for Photocatalytic Hydrogen Generation and the Role of Copper

Advanced Functional Materials, EarlyView.
HKUST‐1/TiO2 composite materials show a very high photocatalytic hydrogen evolution rate which increases as a function of the irradiation time until reaching a plateau and even surpasses the performance of the 1%Pt/TiO2 material after three photocatalytic cycles.
Alisha Khan, Marie Le Pivert, Alireza Ranjbari, Diana Dragoe, Daniel Bahena‐Uribe, Christophe Colbeau‐Justin, Christian Herrero, Dorota Rutkowska‐Zbik, Johnny Deschamps, Hynd Remita   +9 more
wiley   +1 more source

Processes of acceleration and transfer of electrons in a pulse circular ribbon flare

Solar-Terrestrial Physics
We discuss acceleration and transport of electrons in the circular flare SOL2024-03-25T06:37:00 of the M4.4 X-ray class, characterized by a record-short duration of hard X-ray emission pulse.
Altyntsev Alexander, Meshalkina Nataliya, Anfinogentov Sergey, Zhdanov Dmitriy, Myshyakov Ivan, Ivanov Evgeniy, Tan Chengming, Wu Zhao   +7 more
doaj   +1 more source

Studying 630 nm atomic oxygen emission sources during strong magnetic storms in the night mid-latitude ionosphere

Solar-Terrestrial Physics, 2019
We analyze significant increases in 630 nm atomic oxygen night emissions during very strong geomagnetic storms, using optical measurements, theoretical modeling, and magnetogram inversion technique (MIT) data.
Leonovich L.A., Tashchilin A.V., Lunyushkin S.B., Karavaev Yu.A., Penskikh Yu.V.   +4 more
doaj   +1 more source

MICROWAVE INDICATOR OF POTENTIAL GEOEFFECTIVENESS AND MAGNETIC FLUX-ROPE STRUCTURE OF A SOLAR ACTIVE REGION

Solar-Terrestrial Physics, 2021
We analyze the presence of a microwave neutral-line-associated source (NLS) in a super-active region NOAA 12673, which produced a number of geo-effective events in September 2017.
A.V. Kudriavtseva, I.I. Myshyakov, A.M. Uralov, V.V. Grechnev   +3 more
doaj   +1 more source

Observations Supporting the Role of Magnetoconvection in Energy Supply to the Quiescent Solar Atmosphere [PDF]

, 2006
Identifying the two physical mechanisms behind the production and sustenance of the quiescent solar corona and solar wind poses two of the outstanding problems in solar physics today.
Armstrong, James D., Curdt, Werner, Davey, Alisdair R., Hassler, Donald M., Lin, Gang, McIntosh, Scott W., Wilhelm, Klaus   +6 more
core   +3 more sources

Atomic Size Misfit for Electrocatalytic Small Molecule Activation

Advanced Functional Materials, EarlyView.
This review explores the application and mechanisms of atomic size misfit in catalysis for small molecule activation, focusing on how structural defects and electronic properties can effectively lower the energy barriers of chemical bonds in molecules like H2O, CO2, and N2.
Ping Hong, Changfan Xu, Huaping Zhao, Yong Lei   +3 more
wiley   +1 more source

Features of correlation curves of the Siberian Radioheliograph

Solar-Terrestrial Physics
Correlation curves of the multi-frequency Siberian Radioheliograph (SRH) provide a sensitive indication and demonstrative representation of monitoring the microwave life of the active Sun.
Uralov Arkadiy, Lesovoi Sergey, Grechnev Victor, Globa Mariia   +3 more
doaj   +1 more source