Results 101 to 110 of about 41,069 (231)

Photofragment Translational Spectroscopy

open access: yesCHIMIA, 1994
Photofragment translational spectroscopy (PTS) is a technique for studying the mechanisms and the dynamics of photodissociation processes under collision-free conditions.
Peter Felder
doaj   +2 more sources

CALCULATION OF CHEMICAL EQUILIBRIUM IN THE INTERSTELLAR CLOUD

open access: yesOdessa Astronomical Publications, 2017
In order to calculate the molecular concentrations in the interstellar cloud and to obtain heir spatial distribution we have made a computational code to solve the set of equations for chemical equilibrium and equations of charge and atom balance.
I. Shmeld, J. Freimanis, N. G. Bochkarev
doaj   +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

Integrating Flow Chemistry With Electrospray Ionization Mass Spectrometry

open access: yesChemistry–Methods, Volume 5, Issue 4, April 2025.
The direct integration of flow chemistry with electrospray ionization‐mass spectrometry is emerging as a method for real‐time monitoring of reaction mixtures under well‐defined conditions. As shown in selected examples, this interface facilitates the characterization of reaction intermediates, enables the tracking of reaction dynamics under changing ...
Quentin Duez
wiley   +1 more source

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

Photodissociation of the {HeH$^+$} molecular ion

open access: yes, 2009
The photodissociation cross section of the molecular ion HeH$^+$ was calculated within the Born-Oppenheimer approximation for a parallel, a perpendicular, and an isotropic orientation of the molecular axis with respect to the field, considering also ...
Dumitriu, Irina, Saenz, Alejandro
core   +1 more source

Charge State Influence on Stability and Isomerism in Dehydrogenated PAHs: Insights from Anthracene, Acridine, and Phenazine

open access: yesChemPhysChem, Volume 26, Issue 6, March 15, 2025.
The ionization of anthracene, acridine, and phenazine has been explored, along with the removal of one and two hydrogen atoms, to provide valuable information for astrochemists and to understand the behavior of the resulting structures and their electronic reorganization. Abstract In this study, we systematically explored the stability and isomerism of
Khaldia Zghida   +3 more
wiley   +1 more source

Site-Specific Photochemical Reaction for Improved C=C Location Analysis of Unsaturated Lipids by Ultraviolet Photodissociation

open access: yesResearch, 2022
Unraveling the complexity of the lipidome requires the development of novel approaches to facilitate structural identification and characterization of lipid species with isomer-level discrimination. Ultraviolet photodissociation tandem mass spectrometry (
Hai-Fang Li   +5 more
doaj   +1 more source

Contrasting Solution and Gas‐Phase: Understanding  Structure and Reactivity of Gold‐Diazenyl Intermediates

open access: yesHelvetica Chimica Acta, Accepted Article.
Gold(I)‐catalyzed cross‐coupling reactions with aryldiazonium salts are instrumental in forming C‐C and C‐N bonds. However, mechanistic details remain unclear, particularly the role of diazenyl intermediates. We employ stoichiometric reactions, NMR spectroscopy, electrospray ionization mass spectrometry, and infrared photodissociation spectroscopy to ...
Florian Ruepp   +4 more
wiley   +1 more source

Irradiation Investigation: Exploring the Molecular Gas in NGC 7293

open access: yesGalaxies, 2020
Background: Many planetary nebulae retain significant quantities of molecular gas and dust despite their signature hostile radiation environments and energetic shocks.
Jesse Bublitz   +7 more
doaj   +1 more source

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