Results 121 to 130 of about 10,194 (274)

First astronomical detection of the CF+ ion

, 2005
We report the first astronomical detection of the CF+ (fluoromethylidynium) ion obtained by recent observations of its J = 1 - 0 (102.6 GHz), J = 2 - 1 (205.2 GHz), and J = 3 - 2 (307.7 GHz) pure rotational emissions toward the Orion Bar.
D. A. Neufeld, D. C. Lis, E. Herbst, F. Schuller, G. A. Blake, H. Müller, J. H. Black, K. M. Menten, M. G. Wolfire, P. Schilke, R. Güsten, S. Thorwirth   +11 more
core   +2 more sources

Formation of Methanol via Fischer‐Tropsch Catalysis by Cosmic Iron Sulphide

ChemPhysChem, Volume 25, Issue 17, September 2, 2024.
Periodic quantum mechanical simulations evidence the potentiality to synthesise methanol through a Fischer‐Tropsch mechanism in different astrophysical environments facilitated by the catalytic properties of cosmic FeS grains, which are enhanced by the presence of naturally‐occurring point surface defects.
Berta Martinez‐Bachs, Alexia Anguera‐Gonzalez, Gerard Pareras, Albert Rimola   +3 more
wiley   +1 more source

Infrared spectroscopy of the ν3 band of C3 in helium droplets

AIP Advances, 2018
The C3 molecule is an important species known to participate in key chemical reactions in combustion and astrochemistry. Its occurrence in environments of interest, its intramolecular physics, and its intermolecular reactivity have been areas of ...
Barbara A. Harruff-Miller, Christopher E. Bunker, William K. Lewis   +2 more
doaj   +1 more source

Exploring the Scaling Factors for Infrared Modes of PANHs – A Case Study on Cationic 3‐Azafluoranthene⋅+ and Protonated 3‐Azafluoranthene**

ChemPhysChem, Volume 25, Issue 16, August 19, 2024.
The infrared spectra of the 3‐azafluoranthene radical cation and protonated 3‐azafluranthene have been recorded. Simulations show that vibrations with nitrogen contribution should be scaled differently than carbon‐based vibrations. Abstract Infrared (IR) emission bands by interstellar polycyclic aromatic hydrocarbons (PAHs) and polycyclic aromatic ...
Domenik Schleier, Jerry Kamer, Jonathan Martens, Giel Berden, Jos Oomens, Jordy Bouwman   +5 more
wiley   +1 more source

Single‐Step Control of Liquid–Liquid Crystalline Phase Separation by Depletion Gradients

Advanced Materials, Volume 36, Issue 28, July 11, 2024.
Different sizes of nanoparticles with concentration gradients control the liquid–liquid crystalline phase separation (LLCPS) speed and induce different morphologies of tactoids with positional order. Nanoparticles can be templated by LLCPS via size selectivity effects inside and on the surface of tactoids, enabling unprecedented spatial ...
Dongdong Lin, Massimo Bagnani, Hamed Almohammadi, Ye Yuan, Yufen Zhao, Raffaele Mezzenga   +5 more
wiley   +1 more source

Data-Driven Astrochemistry: One Step Further within the Origin of Life Puzzle

Life, 2018
Astrochemistry, meteoritics and chemical analytics represent a manifold scientific field, including various disciplines. In this review, clarifications on astrochemistry, comet chemistry, laboratory astrophysics and meteoritic research with respect to ...
Alexander Ruf, Louis L. S. d’Hendecourt, Philippe Schmitt-Kopplin   +2 more
doaj   +1 more source

Irradiation Investigation: Exploring the Molecular Gas in NGC 7293

Galaxies, 2020
Background: Many planetary nebulae retain significant quantities of molecular gas and dust despite their signature hostile radiation environments and energetic shocks.
Jesse Bublitz, Joel Kastner, Pierre Hily-Blant, Thierry Forveille, Miguel Santander-García, Valentin Bujarrabal, Javier Alcolea, Rodolfo Montez   +7 more
doaj   +1 more source

Astrochemistry: Synthesis and Modelling [PDF]

In the book "Astrochemistry and Astropbiology", edited by Ian W. M. Smith, Charles S. Cockell and Sydney Leach, Publisher: Springer; 2013 edition (October 27, 2012), 2013
We discuss models that astrochemists have developed to study the chemical composition of the interstellar medium. These models aim at computing the evolution of the chemical composition of a mixture of gas and dust under as- trophysical conditions. These conditions, as well as the geometry and the physical dynamics, have to be adapted to the objects ...
arxiv  

The role of ultraviolet photons in circumstellar astrochemistry [PDF]

Chinese Journal of Chemical Physics, 2020
Stars with masses between 1 and 8 solar masses (M⊙) lose large amounts of material in the form of gas and dust in the late stages of stellar evolution, during their Asymptotic Giant Branch (AGB) phase. Such stars supply up to 35% of the dust in the interstellar medium and thus contribute to the material out of which our solar system formed. In addition,
openaire   +5 more sources

Potential energy surfaces and dynamic properties via ab initio composite and density functional approaches

Journal of Computational Chemistry, Volume 45, Issue 16, Page 1352-1363, June 15, 2024.
Infrared spectra for trans‐3‐aminophenol obtained with VCIPSI‐PT2 frequencies with ccCA and B3LYP/aug‐cc‐pVTZ potentials and scaled B3LYP/cc‐pVTZ harmonic frequencies, in comparison to experiment. ccCA anharmonic frequencies are in very good agreement with experiment.
Prajay Patel, Joseph Chung, Max Aksel Bowman, Inga Ulusoy, Angela K. Wilson   +4 more
wiley   +1 more source