Results 41 to 50 of about 35,251 (238)

Modeling the processing of interstellar ices by energetic particles [PDF]

, 2013
Context. Interstellar ice is the main form of metal species in dark molecular clouds. Experiments and observations have shown that the ice is significantly processed after the freeze-out of molecules onto grains.
Kalvāns, Juris, Shmeld, Ivar
core   +1 more source

Chemical Properties of an Aryloxenium Cation with a Triplet Electronic Ground State

Chemistry – A European Journal, Accepted Article.
Aryloxenium cations contain a formally positively‐charged, monovalent oxygen atom with an incomplete electron shell. In spite of this unusual structural element, they are key intermediates in many important processes, such as biological oxidation reactions and the industrial generation of thermoplastics.
Tuong V. Nguyen, John J. Nash, Hilkka Kenttamaa   +2 more
wiley   +1 more source

Origin of Interstellar Molecules [PDF]

Progress of Theoretical Physics, 1973
It is concluded from a thermochemical calculation that the interstellar molecules in the compact H II regions may be formed in places of high temperature and high pressure. A possibility of the locations of molecular formation may be the prestellar atmospheres, but the atmospheres of late type stars are other possible candidates.
openaire   +2 more sources

iSELECTION: An Instrument to Study the Kinetics of Isomer‐Selected Gas‐Phase Ion‐Molecule Reactions

Chemistry–Methods, EarlyView.
Isomer‐specific reactivity is key in cluster chemistry. Herein, it is shown that how combining drift‐tube ion mobility with mass spectrometry enables the derivation of reaction rate coefficients for coexisting C40+$\text{C}_{40}^{+}$ isomers, opening new avenues for studying complex chemical systems ...
Corentin Rossi, Anne P. Rasmussen, Bérenger Gans, Juraj Jašík, Jan Žabka, Marc Albaret, Hugo Bauduin, Christophe Charrière, Jean‐Philippe Dugal, Jérôme Guigand, Catherine Le Bris, Ugo Jacovella   +11 more
wiley   +1 more source

Deep Search for Phosphine in a Prestellar Core

The Astrophysical Journal Letters
Understanding in which chemical forms phosphorus exists in star- and planet-forming regions and how phosphorus is delivered to planets are of great interest from the viewpoint of the origin of life on Earth.
Kenji Furuya, Takashi Shimonishi
doaj   +1 more source

Reaction Kinetics of CN + Toluene and Its Implication on the Production of Aromatic Nitriles in the Taurus Molecular Cloud and Titan’s Atmosphere

The Astrophysical Journal, 2023
Reactions between cyano radicals and aromatic hydrocarbons are believed to be important pathways for the formation of aromatic nitriles in the interstellar medium (ISM) including those identified in the Taurus molecular cloud (TMC-1).
Mengqi Wu, Jiangbin Huang, Xiaoqing Wu, Qifeng Hou, Dongfeng Zhao, Feng Zhang   +5 more
doaj   +1 more source

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

ChemPhysChem, 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, Farouk Hamza Reguig, Manuel Alcamí, Al Mokhtar Lamsabhi   +3 more
wiley   +1 more source

A Framework for Incorporating Binding Energy Distribution in Gas-ice Astrochemical Models

The Astrophysical Journal
One of the most serious limitations of current astrochemical models with the rate equation (RE) approach is that only a single type of binding site is considered in grain surface chemistry, although laboratory and quantum chemical studies have found that
Kenji Furuya
doaj   +1 more source

Chemical Evolution of Some Selected Complex Organic Molecules in Low-mass Star-forming Regions

The Astrophysical Journal, 2023
The destiny of complex organic molecules (COMs) in star-forming regions is interlinked with various evolutionary phases. Therefore, identifying these species in diversified environments of identical star-forming regions would help to understand their ...
Bratati Bhat, Rumela Kar, Suman Kumar Mondal, Rana Ghosh, Prasanta Gorai, Takashi Shimonishi, Kei E. I. Tanaka, Kenji Furuya, Ankan Das   +8 more
doaj   +1 more source

Energy Landscapes in Chemical Reactions and Transport

ChemPhysChem, Volume 26, Issue 6, March 15, 2025.
Kinetics/dynamics of chemical reactivity and transport of chemical species in a solid are both determined by the energy landscape in which they take place. Discussing common grounds but also distinct differences may help in advancing the understanding in both fields.
Karl‐Michael Weitzel
wiley   +1 more source