Results 111 to 120 of about 10,661 (258)

Warm Cores around Regions of Low-Mass Star Formation

, 2010
Warm cores (or hot corinos) around low-mass protostellar objects show a rich chemistry with strong spatial variations. This chemistry is generally attributed to the sublimation of icy mantles on dust grains initiated by the warming effect of the stellar ...
André, Bergin, Bisschop, Bottinelli, Caux, Cazaux, Ceccarelli, Ceccarelli, Ceccarelli, Ceccarelli, Ceccarelli, Ceccarelli, Ceccarelli, Ceccarelli, Collings, Collings, Collings, David A. Williams, Garrod, Geppert, Hatchell, Herbst, Hollis, Le Teuff, Lepp, Maret, Mark P. Collings, Molinari, Nomura, Rawlings, Sakai, Schöier, Serena Viti, Shu, Tielens, Van Dishoeck, Viti, Wakelam, Watanabe, Zainab Awad   +39 more
core   +1 more source

Linear or Cyclic? Theoretical Investigation of Astrophysically Relevant Magnesium‐Bearing MgCnH Carbon Chains and Related Isomers

Journal of Computational Chemistry, Volume 46, Issue 2, January 15, 2025.
The global minimum energy structure of astrophysically relevant MgCnH systems is linear when n is even, and cyclic when n is odd. ABSTRACT Magnesium‐containing molecules, including MgC2H, MgC4H, and MgC6H, have been detected in the interstellar medium, largely facilitated by their high dipole moments.
A. Karolyna M. S. Gomes, Ricardo R. Oliveira, Thiago M. Cardozo, Felipe Fantuzzi   +3 more
wiley   +1 more source

The largest oxigen bearing organic molecule repository

, 2007
We present the first detection of complex aldehydes and isomers in three typical molecular clouds located within 200pc of the center of our Galaxy. We find very large abundances of these complex organic molecules (COMs) in the central molecular zone ...
Huttemeister S., J. Martin‐Pintado, M. A. Requena‐Torres, M. R. Morris, Martin-Pintado J., Nummelin A., Rodriguez-Fernandez N. J., S. Martin, Tielens A. G. G. M.   +8 more
core   +1 more source

Phenyl Radical Activates Molecular Hydrogen Through Protium and Deuterium Tunneling

Angewandte Chemie International Edition, Volume 63, Issue 51, December 16, 2024.
Activating the strong H2 bond is typically reserved for transition metals, and only a few main group systems can tackle this challenge. Here, we explore a phenyl radical mediated pathway utilizing the photolysis of iodobenzene. The phenyl radical leverages the high C−H bond energy of the forming benzene to drive H2 activation.
Virinder Bhagat, Jan Meisner, Jan Philipp Wagner   +2 more
wiley   +1 more source

PREBIOTIC ASTROCHEMISTRY IN THE "THz-GAP" [PDF]

Proceedings of the 2021 International Symposium on Molecular Spectroscopy, 2020
Fundamental biological molecules such as amino acids and sugars have been discovered in meteorites, but none of these species have yet been definitively detected in the interstellar medium (ISM). While both the number of detected interstellar molecules and their chemical complexity continue to increase, understanding of the processes leading to their ...
openaire   +2 more sources

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

Manipulating tunnelling gateways in condensed phase isomerization

Natural Sciences, 2023
When a chemical reaction occurs via tunnelling, a simple mass‐dependence is expected, where substitution of atoms by heavier isotopes leads to a reduced reaction rate.
Arnab Choudhury, Shreya Sinha, David Harlander, Jessalyn DeVine, Alexander Kandratsenka, Peter Saalfrank, Dirk Schwarzer, Alec M. Wodtke   +7 more
doaj   +1 more source

Extended Red Emission and the evolution of carbonaceaous nanograins in NGC 7023

, 2008
Extended Red Emission (ERE) was recently attributed to the photo-luminescence of either doubly ionized Polycyclic Aromatic Hydrocarbons (PAH$^{++}$), or charged PAH dimers. We analysed the visible and mid-infrared (mid-IR) dust emission in the North-West
Berne, O., Cuillandre, J. -C., Deville, Y., Joblin, C., Rapacioli, M., Thomas, J.   +5 more
core   +3 more sources

Harmonic Scale Factors of Fundamental Transitions for Dispersion‐corrected Quantum Chemical Methods

ChemPhysChem, Volume 25, Issue 23, December 2, 2024.
This study presents two new sets of scaling factors for adjusting theoretical harmonic vibrational spectra computed using dispersion‐corrected density functional theory methods to better match experimental data. The first set (absolute scaling) better aligns with higher frequencies, while the second one (relative scaling) evenly reduces errors across ...
Denis S. Tikhonov, Igor Gordiy, Danila A. Iakovlev, Alisa A. Gorislav, Mikhail A. Kalinin, Sergei A. Nikolenko, Ksenia M. Malaskeevich, Karina Yureva, Nikita A. Matsokin, Melanie Schnell   +9 more
wiley   +1 more source

Exploring the Growth Dynamics of Size‐Selected Carbon Atomic Wires with In Situ UV Resonance Raman Spectroscopy

Small, Volume 20, Issue 49, December 5, 2024.
Time‐resolved, in situ UV resonance Raman approach to monitor carbon atomic wires growth via pulsed laser ablation in liquid. This approach tracks solvent‐dependent, size‐selected wires formation, correlating their Raman responses with concentration as a function of ablation time.
Pietro Marabotti, Sonia Peggiani, Simone Melesi, Barbara Rossi, Alessandro Gessini, Andrea Li Bassi, Valeria Russo, Carlo Spartaco Casari   +7 more
wiley   +1 more source