Results 81 to 90 of about 40,404 (274)

Rovibrationally resolved photodissociation of HeH+

open access: yes, 2011
Accurate photodissociation cross sections have been obtained for the A-X electronic transition of HeH+ using ab initio potential curves and dipole transition moments.
Argyros   +19 more
core   +1 more source

Single and Double Photoionization and Photodissociation of Toluene by Soft X-rays in Circumstellar Environment [PDF]

open access: yes, 2016
The formation of polycyclic aromatic hydrocarbons (PAHs) and their methyl derivatives occurs mainly in the dust shells of asymptotic giant branch (AGB) stars.
Boechat-Roberty, H. M.   +4 more
core   +2 more sources

Determining the charge distribution and the direction of bond cleavage with femtosecond anisotropic x-ray liquidography

open access: yesNature Communications, 2022
Tracking the flow of charge in reacting molecules may provide key insight into reaction mechanisms, but is particularly challenging in liquid solutions.
Jun Heo   +7 more
doaj   +1 more source

Feedback from first radiation sources: H- photodissociation [PDF]

open access: yesAstrophys.J.665:L85-L88, 2007, 2007
During the epoch of reionization, the formation of radiation sources is accompanied by the growth of a H- photodissociating flux. We estimate the impact of this flux on the formation of molecular hydrogen and cooling in the first galaxies, assuming different types of radiation sources (e.g. Pop II and Pop III stars, miniquasars).
arxiv   +1 more source

Near-UV photolysis cross sections of CH_3OOH and HOCH_2OOH determined via action spectroscopy [PDF]

open access: yes, 2006
Knowledge of molecular photolysis cross sections is important for determining atmospheric lifetimes and fates of many species. A method and laser apparatus for measurement of these cross sections in the near-ultraviolet (UV) region is described.
Fry, J. L.   +3 more
core   +1 more source

Correlation of optical conductivity and ARPES spectra of strong-coupling large polarons and its display in cuprates

open access: yes, 2007
Common approach is used to calculate band due to strong-coupling large polaron (SCLP) photodissociation in ARPES and in optical conductivity (OC) spectra. It is based on using the coherent-states representation for the phonon field in SCLP.
A. E. Myasnikova   +5 more
core   +1 more source

Spectroscopy of Rb$_{2}$ dimers in solid $^{4}$He [PDF]

open access: yes, 2006
We present experimental and theoretical studies of the absorption, emission and photodissociation spectra of Rb$_{2}$ molecules in solid helium. We have identified 11 absorption bands of Rb$_{2}$.
A. Hofer   +5 more
core   +2 more sources

Mechanistic Investigation of an Organocatalytic Bromocyclization of O‐Allyl Carbamates

open access: yesChemCatChem, EarlyView.
The enantioselective bromoaminocyclization of O‐cinnamyl tosylcarbamates catalyzed by thiourea‐functionalized Cinchona alkaloids achieved 80:20 er and 69% isolated yield. Experimental and theoretical studies reveal key bromonium intermediates and non‐covalent interactions stabilizing the catalytic structure. This model reaction elucidates the mechanism
Francisco Wanderson Moreira Ribeiro   +5 more
wiley   +1 more source

Photodissociation Dynamics of the Iodine-Arene Charge-Transfer Complex [PDF]

open access: yes, 1996
The photodissociation reaction of the molecular iodine:arene charge-transfer (CT) complex into an iodine atom and an iodine atom-arene fragment has been investigated using femtosecond pump-probe, resonance Raman, and molecular dynamics simulations.
Duppen, Koos,   +5 more
core   +3 more sources

Size‐Dependent Ultrafast UV Photochemistry of Aliphatic Disulfides in Solution

open access: yesChemistry – A European Journal, Accepted Article.
We have investigated the photochemistry of dimethyl disulfide (DMDS) and glutathione disulfide (GSSG) in solution upon ultraviolet (UV) excitation in comparison to L‐cystine by femtosecond X‐ray absorption spectroscopy at the sulfur K‐edge. For these aliphatic disulfides, the very similar differential absorption spectra reveal unequivocally a pair of ...
Jessica Harich   +14 more
wiley   +1 more source

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