Results 71 to 80 of about 10,661 (258)

Effects of turbulent dust grain motion to interstellar chemistry

, 2015
Theoretical studies have revealed that dust grains are usually moving fast through the turbulent interstellar gas, which could have significant effects upon interstellar chemistry by modifying grain accretion.
Ge, J. X., He, J. H., Yan, H. R.
core   +1 more source

Astrochemistry

Plasma Sources Science and Technology, 2015
In the last 40 years a wide range of molecules, including neutrals, cations and anions, containing up to 13 atoms—in addition to detections of C60 and C70 — have been found in the harsh environment of the interstellar medium. The exquisite sensitivity and very high spectral and, more recently, spatial resolution, of modern telescopes has enabled the ...
openaire   +3 more sources

Data for Photodissociation of Some Small Molecular Ions Relevant for Astrochemistry and Laboratory Investigation

Data, 2022
The calculated photodissociation data of some small molecular ions have been reported. The cross-sections and spectral rate coefficients data have been studied using a quantum mechanical method. The plasma parameters, i.e., conditions, cover temperatures
Vladimir A. Srećković, Ljubinko M. Ignjatović, Aleksandra Kolarski, Zoran R. Mijić, Milan S. Dimitrijević, Veljko Vujčić   +5 more
doaj   +1 more source

Isolation and Structure Elucidation of the Heterocumulene Anions [NCC‐L]− (L=CO, CS, N2)

Angewandte Chemie, Volume 137, Issue 13, March 24, 2025.
The cumulated 5‐atomic cyanodiazomethanide [NCCNN]− and thioketenyl anion [NCCCS]− were synthesized from the metalated ylide and ketenyl anion, respectively. Both anions exhibit unexpected stability, but with notable structural differences. While the cyanodiazomethanide features a distinctly bent geometry, the thioketenyl anion was found to be linear ...
Quentin Le Dé, Yihao Zhang, Lili Zhao, Felix Krischer, Kai‐Stephan Feichtner, Gernot Frenking, Viktoria H. Gessner   +6 more
wiley   +2 more sources

Reaction Kinetics in a Tight Spot

, 2005
The standard analysis of reaction networks based on deterministic rate equations fails in confined geometries, commonly encountered in fields such as astrochemistry, thin film growth and cell biology.
Bartholomay, Biham, Caselli, Castellano, Delbrück, Elowitz, Green, Hess, Krug, Krug, Lagally, Lipshtat, McAdams, Michely, Paulsson, Rottler, Togashi   +16 more
core   +1 more source

HC_nH⁻ Anion Chains with n ≤ 8 Are Nonlinear and Their Permanent Dipole Makes Them Potential Candidates for Astronomical Observation

Molecules, 2022
To be detectable in space via radio astronomy, molecules should have a permanent dipole moment. This is the plausible reason why HCnH chains are underproportionally represented in the interstellar medium in comparison with the isoelectronically ...
Ioan Bâldea
doaj   +1 more source

Reaction Networks For Interstellar Chemical Modelling: Improvements and Challenges

, 2010
We survey the current situation regarding chemical modelling of the synthesis of molecules in the interstellar medium. The present state of knowledge concerning the rate coefficients and their uncertainties for the major gas-phase processes -- ion ...
Agundez, M., Cuppen, H. M., Geppert, W., Herbst, E., Linnartz, H., Loison, J. C., Oberg, K., Pernot, P., Roueff, E., Smith, I. W. M., Talbi, D., Troe, J., Wakelam, V.   +12 more
core   +3 more sources

A hybrid moment equation approach to gas-grain chemical modeling [PDF]

, 2011
[Context] The stochasticity of grain chemistry requires special care in modeling. Previously methods based on the modified rate equation, the master equation, the moment equation, and Monte Carlo simulations have been used. [Aims] We attempt to develop a
Awad, B. Parise, Barzel, Barzel, Barzel, Biham, Biham, Caselli, Chang, Charnley, Charnley, Charnley, Charnley, Cuppen, F. Du, Garrod, Garrod, Garrod, Gillespie, Gillespie, Gillespie, Gillespie, Green, Hasegawa, Hasegawa, Lipshtat, Mattis, McQuarrie, Menten, Ohkubo, Rae, Stantcheva, Stantcheva, Stantcheva, Tielens, Tielens, Vasyunin, Vasyunin, Woodall   +38 more
core   +2 more sources

UV–Vis Spectra of Carbonic Acid: Rationalizing Experimental Redshifts between Monomer and Bulk based on (H2CO3)n Calculations

ChemPhysChem, EarlyView.
In bulk carbonic acid (e.g., in interstellar icy dust grains) cluster formation produces two distinct UV‐Vis spectral features redshifted by ≈2 eV (25 nm) and by ≈5 eV (80 nm) compared to gas phase single molecule carbonic acid 's adiabatic ionization energy. Theory and experiment were used to investigate the origin of these shifts.
Dennis F. Dinu, Bastian Klein, Chaojiang Zhang, Radu A. Talmazan, Thomas Loerting, Hinrich Grothe, Ralf I. Kaiser, Maren Podewitz   +7 more
wiley   +1 more source

Astrochemistry and Observations [PDF]

, 1997
8 pages, 6 figures in text, From Fourth Cologne-Bonn-Zermatt-Symposium, The Dense Interstellar Matter in ...
openaire   +3 more sources