Results 51 to 60 of about 2,262 (175)
Anomalous formation of trihydrogen cations from water on nanoparticles
Nature Communications, 2021 The H3 + ion plays a key role in interstellar chemistry and can be formed from organic compounds upon interaction with charged particles or radiation. Here the authors demonstrate that H3 + can also be formed from water adsorbed on silica nanoparticles ...
M. Said Alghabra +11 more
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Ab Initio Study of Fine and Hyperfine Interactions in Triplet POH
Molecules, 2022 Phosphorous-containing molecules have a great relevance in prebiotic chemistry in view of the fact that phosphorous is a fundamental constituent of biomolecules, such as RNA, DNA, and ATP.
Luca Bizzocchi +4 more
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Interstellar deuterium chemistry [PDF]
Philosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences, 1981 Abstract An interstellar reaction scheme of the type described by E. Iglesias (Astrophys. J. 218, 697 (1977)) has been extended to include deuterium chemistry and also isomeric forms of some molecules. The role of isomeric forms of the intermediates CNH2 and HCNH+ in the production of interstellar HCN and HNC is considered. The lowest
R. D. Brown, E. Rice
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BIO Web of Conferences, 2014 What is the role played by amino acids in the chemistry of the interstellar medium and the emergence of life on the early Earth? Are they really the primary key compounds as free amino acids?
Guillemin J-C.
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The chemistry of planet-forming regions is not interstellar [PDF]
Faraday Discuss., 2014 Advances in infrared and submillimeter technology have allowed for detailed observations of the molecular content of the planet-forming regions of protoplanetary disks. In particular, disks around solar-type stars now have growing molecular inventories that can be directly compared with both prestellar chemistry and that inferred for the early solar ...
Pontoppidan, Klaus M. +1 more
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Chemistry – A European Journal, EarlyView.First controlled formation of cyanohexatriyne (HC7N) is achieved using a cobalt–alkyne masking strategy that overcomes the intrinsic instability of nitrile‐substituted polyynes. The approach enables spectroscopic validation of HC7N and reveals its pronounced electrophilicity through a selective conjugate addition with diethylamine.
Léa Lefrançois +4 more
wiley +1 more source
Survival of polycyclic aromatic hydrocarbon knockout fragments in the interstellar medium
Nature Communications, 2021 Ion storage rings allow reactions to be studied over orders of magnitude in time, bridging the gap between typical experimental and astronomical timescales.
Michael Gatchell +8 more
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Clathrate hydrate crystallization
The Canadian Journal of Chemical Engineering, EarlyView.Abstract Clathrate hydrate crystallization has been an area of interest to chemical engineers from the point of view of crystal structure, thermophysical properties, phase equilibria, kinetics, industrial applications, and environmental (climate change) implications.
Peter Englezos
wiley +1 more source
Bistability in Interstellar Gas‐Phase Chemistry [PDF]
The Astrophysical Journal, 2006 We present an analysis of "bistability" in gas-phase chemical models of dark interstellar clouds. We identify the chemical mechanisms that allow high- and low-ionization solutions to the chemical rate-equations to coexist. We derive simple analytic scaling relations for the gas densities and ionization rates for which the chemistry becomes bistable. We
Boger, Gai I., Sternberg, Amiel
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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 +3 more
wiley +1 more source