Results 41 to 50 of about 2,302 (180)

Spectroscopy and Chemical Dynamics

CHIMIA, 2010
Chemical physics and molecular spectroscopy are topics with a traditionally strong emphasis in the department. Current research focuses on the spectroscopic characterization of transient molecules present in interstellar space and the ...
John P. Maier, Stefan Willitsch
doaj   +1 more source

The Rich Chemistry of Ionized Methanol With Sulfur Dioxide: Pathways to Prebiotic and Elusive Species in Earth's Atmosphere and Space

Chemistry – A European Journal, EarlyView.
The reaction between the methanol radical cation and sulfur dioxide is remarkably fast and forms several ionic and neutral products (HOSOH+, CH2OSO+, CH2OH+, CH2O, H2O, HSO2). The chemistry goes beyond simple proton or hydrogen transfer, revealing a close interaction between the two species, relevant to atmospheric and astrochemical environments where ...
Mauro Satta, Daniele Catone, Mattea Carmen Castrovilli, Antonella Cartoni   +3 more
wiley   +1 more source

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
openaire   +1 more source

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

Amino Acids in the Universe

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.
doaj   +1 more source

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, Silvia Alessandrini, Mattia Melosso, Víctor M. Rivilla, Cristina Puzzarini   +4 more
doaj   +1 more source

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 ...
Pontoppidan, Klaus M., Blevins, Sandra M.   +1 more
openaire   +3 more sources

Size Matters: Barrier Heights and Widths in the Kinetics Of Tautomerisation and Rotamerisation of Thiotropolone and Its Five‐ and Three‐Membered Cyclic Analogues

International Journal of Chemical Kinetics, EarlyView.
ABSTRACT Recent experiments by Nunes et al. have demonstrated that unprecedented control of chemical reactions is possible by narrowband infrared vibrational photo‐excitation at low temperatures in inert matrices. The generated higher energy level conformers may then undergo rotamerisation and tautomerisation reactions which provide extremely useful ...
Judith Wurmel, John M. Simmie
wiley   +1 more source

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, Rami Ali, Vyacheslav Kim, Mazhar Iqbal, Philipp Rosenberger, Sambit Mitra, Ritika Dagar, Philipp Rupp, Boris Bergues, Deepak Mathur, Matthias F. Kling, Ali S. Alnaser   +11 more
doaj   +1 more source

Cis–Trans Rotational Isomerism of Formic Acid, Sulfur, and Selenium Analogues and Their Dimers: Chemical Kinetics Under Interstellar Conditions

International Journal of Chemical Kinetics, EarlyView.
ABSTRACT We present chemical kinetic rate constants for the cis to trans isomerisation or rotamerization of monomeric seleno‐, thio‐, and formic acids and that of three of their dimeric species, based on variational transition state theory and multidimensional tunneling calculations in the gas‐phase, from 10 K to 300 K. These provide, firstly, reliable
Judith Wurmel, John M. Simmie
wiley   +1 more source