Results 81 to 90 of about 2,302 (180)

Rotational-state-selected Carbon Astrochemistry

CHIMIA
The addition of individual quanta of rotational excitation to a molecule has been shown to markedly change its reactivity by significantly modifying the intermolecular interactions. So far, it has only been possible to observe these rotational effects in
Jutta Toscano
doaj   +1 more source

Gas-surface interactions and heterogeneous chemistry on interstellar grains analogues

EPJ Web of Conferences, 2012
Detailed laboratory studies and progress in surface science technique, have allowed in recent years the first experimental confirmation of surface reaction schemes, as introduced by Tielens, Hagen and Charnley [1,2].
Cazaux S., Romanzin C., Dulieu F., Fillion J.H.   +3 more
doaj   +1 more source

Monosaccharides and Their Derivatives in Carbonaceous Meteorites: A Scenario for Their Synthesis and Onset of Enantiomeric Excesses

Life, 2018
Carbonaceous meteorites provide the best glimpse into the solar system’s earliest physical and chemical processes. These ancient objects, ~4.56 billion years old, contain evidence of phenomena ranging from solar system formation to the synthesis of
George Cooper, Andro C. Rios, Michel Nuevo   +2 more
doaj   +1 more source

Binding Energies of Interstellar Complex Organic Molecules on Water Ice Surfaces: A Quantum Chemical Investigation

The Astrophysical Journal
Interstellar dust grains are enveloped by ices of frozen molecules in cold, dense regions of the interstellar medium (ISM), which are also observed in the gas phase. Whether a species is in the solid or gaseous state is governed by its binding energy (BE)
Harjasnoor Kakkar, Berta Martínez-Bachs, Cecilia Ceccarelli, Piero Ugliengo, Albert Rimola   +4 more
doaj   +1 more source

Computational investigation of interstellar C4H3N isomers formation via propargyl and cyano radical association

Discover Chemistry
The formation of C4H3N isomers (1-cyano-cyclopropene, propargyl cyanide, cyanoallene, cyanopropyne, and their isonitrile analogs) via radical association and hydrogen migration reactions between propargyl (CH2CCH) and cyano (CN) radicals was investigated
Parmanand Pandey, Pravi Mishra, Rachana Singh, Manisha Yadav, Shivani, Aftab Ahamad, Alka Misra, Poonam Tandon, Amritanshu Shukla   +8 more
doaj   +1 more source

Organic synthesis applied to space sciences

EPJ Web of Conferences, 2012
About 160 molecules have been detected in the interstellar medium, the comae and the atmospheres of planets. The presence of these compounds leads to imagine a chemistry of these media to explain the formation of these species and to predict the possible
Guillemin J.-C.
doaj   +1 more source

Can Cyanide Radicals Drive Molecular Backbone Growth on Interstellar Icy Grains?

The Astrophysical Journal
Motivated by the value of CN-bearing molecules as tracers of interstellar physical conditions, we investigate the reactions of adsorbed CN radicals with acetylene and ethylene (C _2 H _2 and C _2 H _4 ) on interstellar dust-grain analogs using quantum ...
Germán Molpeceres, Joan Enrique-Romero
doaj   +1 more source

Interstellar Molecules and Chemistry [PDF]

Science, 1970
openaire   +2 more sources

Rovibrational Transitions in HCl due to Collisions with H2: Spin-free and Hyperfine-resolved Transitions

The Astrophysical Journal
Hydrogen chloride (HCl) is a key repository of chlorine in the interstellar medium. Accurate determinations of its abundance are critical to assessing the chlorine elemental abundance and constraining stellar nucleosynthesis models.
Daniel Hoffman, Josiah Taylor, T. J. Price, Robert C. Forrey, B. H. Yang, P. C. Stancil, Z. E. Zhang, N. Balakrishnan   +7 more
doaj   +1 more source

Carbon-chain chemistry in the interstellar medium

Astrophysics and Space Science
AbstractThe presence of carbon-chain molecules in the interstellar medium (ISM) has been known since the early 1970s and $>130$ > 130 such species have been identified to date, making up $\sim 43$ ∼ 43 % of the total of detected ISM molecules.
Taniguchi, Kotomi, Gorai, Prasanta, Tan, Jonathan C.   +2 more
openaire   +2 more sources