Results 71 to 80 of about 8,526 (198)

Solid-state production of complex organic molecules: H-atom addition versus UV irradiation [PDF]

, 2018
Complex organic molecules (COMs) have been observed in comets, hot cores and cold dense regions of the interstellar medium. It is generally accepted that these COMs form on icy dust grain through the recombination reaction of radicals triggered by either
Chuang, K. -J.
core   +3 more sources

Ion Source Complementarity for Characterization of Complex Organic Mixtures Using Fourier Transform Mass Spectrometry: A Review

Mass Spectrometry Reviews, EarlyView.
ABSTRACT Complex organic mixtures are found in many areas of research, such as energy, environment, health, planetology, and cultural heritage, to name but a few. However, due to their complex chemical composition, which holds an extensive potential of information at the molecular level, their molecular characterization is challenging.
Charlotte Mase, Maxime Sueur, Hélène Lavanant, Christopher Paul Rüger, Pierre Giusti, Carlos Afonso   +5 more
wiley   +1 more source

Spectroscopy: Aromatic astrochemistry [PDF]

Nature Reviews Chemistry, 2018
The first detection of rotational features of benzonitrile offers the opportunity to undesrtand the origin of PAHs in space.
openaire   +1 more source

Searching for O$_2$ in the SMC:Constraints on Oxygen Chemistry at Low Metallicities

, 2005
We present a 39 h integration with the Odin satellite on the ground-state 118.75 GHz line of O2 towards the region of strongest molecular emission in the Small Magellanic Cloud. Our 3sigma upper limit to the O2 integrated intensity of
A. O. H. Olofsson, Aa. Sandqvist, Bergin, C. D. Wilson, Chin, Chièze, Combes, Dufour, Frayer, Frisk, Goldsmith, Goldsmith, Gordon, Graedel, Harries, L. Pagani, Langer, Larsson, Liszt, Liszt, M. Olberg, Pagani, Peimbert, R. S. Booth, Roberts, Rubio, Rubio, Rubio, Spaans, U. Frisk, Vermeij, Viti, White, Wilke, Wilke, Wilson, Å. Hjalmarson   +36 more
core   +1 more source

An injector testbed based on a direct current gun and an interchangeable very high frequency gun for superconducting continuous‐wave free‐electron lasers

Journal of Synchrotron Radiation, EarlyView.
An injector testbed for continuous‐wave free‐electron lasers based on a direct current gun and an interchangeable very high frequency gun is under construction. Its physical design and performance have been studied carefully.The continuous‐wave free‐electron laser (CW‐FEL), based on superconducting radiofrequency (SRF) technology with an electron bunch
Xinmeng Li, Jitao Sun, Yong Yu, Jiahang Shao, Jiayue Yang, Quan Zhou, Hongli Ding, Lei Shi, Kai Tao, Chenglin Guo, Zhigang He, Zhichao Chen, Zhen Chen, Shaohua Peng, Hongfei Wang, Guoqing Zhang, Baichao Zhang, Zongbin Li, Feng Zhao, Wei Wei, Maomao Huang, Wei Wang, Ming Liu, Chaofeng He, Liangbing Hu, Yaqiong Wang, Han Li, Weiming Yue, Xilong Wang, Guorong Wu, Dongxu Dai, Weiqing Zhang, Xueming Yang   +32 more
wiley   +1 more source

Redefining proton affinity for heteronuclear molecular species: quantum chemical insights

Discover Chemistry
One of the main problems with experimental methods for detecting proton affinity (PA) is that they cannot perform site-specific protonation. For heteronuclear molecular species that have two or more protonation sites, the experimental PA measurement only
E. E. Etim, J. P. Shinggu, H. S. Samuel, B. Bako, D. K. Sahoo, L. Mweene, S. Kaya   +6 more
doaj   +1 more source

Proton and Electron Irradiations of CH₄:H₂O Mixed Ices

Atoms, 2023
The organic chemistry occurring in interstellar environments may lead to the production of complex molecules that are relevant to the emergence of life. Therefore, in order to understand the origins of life itself, it is necessary to probe the chemistry ...
Duncan V. Mifsud, Péter Herczku, Béla Sulik, Zoltán Juhász, István Vajda, István Rajta, Sergio Ioppolo, Nigel J. Mason, Giovanni Strazzulla, Zuzana Kaňuchová   +9 more
doaj   +1 more source

LIDA: The Leiden Ice Database for Astrochemistry

Astronomy & Astrophysics, 2022
Context. High-quality vibrational spectra of solid-phase molecules in ice mixtures and for temperatures of astrophysical relevance are needed to interpret infrared observations toward protostars and background stars. Such data are collected worldwide by several laboratory groups in support of existing and upcoming astronomical observations.
W. R. M. Rocha, M. G. Rachid, B. Olsthoorn, E. F. van Dishoeck, M. K. McClure, H. Linnartz   +5 more
openaire   +4 more sources

Computational Protocol for the Identification of Candidates for Radioastronomical Detection and Its Application to the C₃H₃NO Family of Isomers

Molecules, 2023
The C3H3NO family of isomers is relevant in astrochemistry, even though its members are still elusive in the interstellar medium. To identify the best candidate for astronomical detection within this family, we developed a new computational protocol ...
Silvia Alessandrini, Mattia Melosso, Víctor M. Rivilla, Luca Bizzocchi, Cristina Puzzarini   +4 more
doaj   +1 more source

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