Results 1 to 10 of about 844 (169)

Wavelength dependent excited state dynamics observed in canonical pyrimidine nucleosides

Journal of Photochemistry and Photobiology, 2023
Epidemiological evidence indicates that damage to DNA/RNA initialized by ultraviolet (UV) radiation is associated with skin cancer. Wavelength dependence of DNA photodamage was proposed as early as 1990s and demonstrated later on.
Peicong Wu, Xueli Wang, Haifeng Pan, Jinquan Chen   +3 more
doaj   +1 more source

Ballistic excited state dynamics revealed by polarized fs-XANES [PDF]

EPJ Web of Conferences, 2019
Polarized time-resolved X-ray absorption near edge structure (XANES) is used to characterize the sequential ballistic excited state dynamics of two B12 vitamers: cyanocobalamin and adenosylcobalamin.
Sension Roseanne J., Miller Nicholas A., Deb Aniruddha, Alonso-Mori Roberto, Glownia James M., Penner-Hahn James E.   +5 more
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Theory predicts UV/vis-to-IR photonic down conversion mediated by excited state vibrational polaritons

Nature Communications, 2023
This work proposes a photophysical phenomenon whereby ultraviolet/visible (UV/vis) excitation of a molecule involving a Franck-Condon (FC) active vibration yields infrared (IR) emission by strong coupling to an optical cavity.
Connor K. Terry Weatherly, Justin Provazza, Emily A. Weiss, Roel Tempelaar   +3 more
doaj   +1 more source

Photoluminescence of Cis-Polyacetylene Semiconductor Material

Applied Sciences, 2022
Photoluminescence (PL) is one of the key experimental characterizations of optoelectronic materials, including conjugated polymers (CPs). In this study, a simplified model of an undoped cis-polyacetylene (cis-PA) oligomer was selected and used to explain
Kamrun N. Keya, Mohammed A. Jabed, Wenjie Xia, Dmitri Kilin   +3 more
doaj   +1 more source

Excited‐State Dynamics in All‐Polymer Blends with Polymerized Small‐Molecule Acceptors

Advanced Science, 2023
Polymerizing small‐molecular acceptors (SMAs) is a promising route to construct high performance polymer acceptors of all‐polymer solar cells (all‐PSCs).
Ziran Liu, Qian Li, Lulu Fu, Jide Wang, Jing Ma, Chunfeng Zhang, Rui Wang   +6 more
doaj   +1 more source

Systematic Investigation of the Reliability of the Frozen Nuclei Approximation for Short-Pulse Excitation: The Example of HCCI+

Frontiers in Chemistry, 2022
In this work we quantitatively study the reliability of the frozen nuclei approximation for ultrafast dynamics. Specifically we study laser excitation of HCCI+ from its ground state to the first electronically excited state.
Dongming Jia, Yonggang Yang, Yonggang Yang   +2 more
doaj   +1 more source

Excited State Dynamics with Quantum Trajectories

CHIMIA, 2012
Nuclear quantum dynamics beyond the Born-Oppenheimer approximation is performed using quantum trajectories. Withintheadiabaticrepresentationoftheelectronicstates, NABDY(NonAdiabaticBohmianDYnamics) is used in combination with DFT and LR-TDDFT to
Basile F. E. Curchod, Ursula Rothlisberger, Ivano Tavernelli   +2 more
doaj   +1 more source

Directly imaging excited state-resolved transient structures of water induced by valence and inner-shell ionisation

Nature Communications, 2023
Real-time imaging of transient structure of the electronic excited state is fundamentally critical to understand and control ultrafast molecular dynamics.
Zhenzhen Wang, Xiaoqing Hu, Xiaorui Xue, Shengpeng Zhou, Xiaokai Li, Yizhang Yang, Jiaqi Zhou, Zheng Shu, Banchi Zhao, Xitao Yu, Maomao Gong, Zhenpeng Wang, Pan Ma, Yong Wu, Xiangjun Chen, Jianguo Wang, Xueguang Ren, Chuncheng Wang, Dajun Ding   +18 more
doaj   +1 more source

Ultrafast Excited-State Dynamics in Biological Environments

CHIMIA, 2007
We discuss and illustrate by several examples how the ultrafast excited-state dynamics of a chromophore can be altered when changing its environment from a homogenous solution to a biological molecule such as proteins or nucleic acids.
Alexandre Fürstenberg, Eric Vauthey
doaj   +1 more source

The Role of H-Bonds in the Excited-State Properties of Multichromophoric Systems: Static and Dynamic Aspects

Molecules, 2023
Given their importance, hydrogen bonds (H-bonds) have been the subject of intense investigation since their discovery. Indeed, H-bonds play a fundamental role in determining the structure, the electronic properties, and the dynamics of complex systems ...
Elisa Fresch, Elisabetta Collini
doaj   +1 more source