Carbon Atom Condensation on NH3-H2O Ices. An Alternative Pathway to Interstellar Methanimine and Methylamine

2025-04-28T11:14:03+02:00Tags: , , , |

Authors: Molpeceres, German; Tsuge, Masashi; Furuya, Kenji; Watanabe, Naoki; San Andres, David; Rivilla, Victor M.; Colzi, Laura; Aikawa, Yuri Journal: JOURNAL OF PHYSICAL CHEMISTRY A Publication date: 2024/05/06 DOI: 10.1021/acs.jpca.3c08286 Abstract: The recent discovery of the nature and behavior of carbon atoms interacting with interstellar ices has prompted a number of investigations on the chemistry [...]

Rate coefficients for the O + H2 and O + D2 reactions: how well ring polymer molecular dynamics accounts for tunelling

2025-04-28T11:13:59+02:00Tags: , , , |

Authors: Menendez, Marta; Veselinova, Anzhela; Zanchet, Alexandre; Jambrina, Pablo G.; Aoiz, F. Javier Journal: PHYSICAL CHEMISTRY CHEMICAL PHYSICS Publication date: 2024/07/05 DOI: 10.1039/d4cp01711k Abstract: We present here extensive calculations of the O(P-3) + H-2 and O(P-3) + D-2 reaction dynamics spanning the temperature range from 200 K to 2500 K. The calculations have been carried [...]

Low-lying Negative Ion States Probed in Potassium – Ethanol Collisions

2025-04-28T11:13:55+02:00Tags: , , , |

Authors: Lozano, Ana Isabel; Kumar, Sarvesh; Pereira, Pedro J. S.; Kerkeni, Boutheina; Garcia, Gustavo; Limao-Vieira, Paulo Journal: CHEMPHYSCHEM Publication date: 2024/07/15 DOI: 10.1002/cphc.202400314 Abstract: Dissociative electron transfer in collisions between neutral potassium atoms and neutral ethanol molecules yields mainly OH-, followed by C2H5O-, O-, CH3- and CH2-. The dynamics of negative ions have been investigated [...]

Integral Electron Scattering Cross Sections from N2O for Impact Energies Ranging from 1 to 1000 eV

2025-04-28T11:13:55+02:00Tags: , , , |

Authors: Lozano, Ana I.; Rosado, Jaime; Blanco, Francisco; Limao-Vieira, Paulo; Garcia, Gustavo Journal: JOURNAL OF PHYSICAL CHEMISTRY A Publication date: 2024/01/16 DOI: 10.1021/acs.jpca.3c07708 Abstract: Accurate total cross sections (TCS), within 5%, for electron scattering by N2O molecules have been measured with a magnetically confined electron transmission apparatus for impact energies ranging from 1 to 200 [...]

Support effects on conical intersections of Jahn-Teller fluxional metal clusters on the sub-nanoscale

2025-04-28T11:13:51+02:00Tags: , , , |

Authors: Krupka, Katarzyna M.; de Lara-Castells, Maria Pilar Journal: PHYSICAL CHEMISTRY CHEMICAL PHYSICS Publication date: 2024/10/09 DOI: 10.1039/d4cp03271c Abstract: The concept of fluxionality has been invoked to explain the enhanced catalytic properties of atomically precise metal clusters of subnanometer size. Cu-3 isolated in the gas phase is a classical case of a fluxional metal cluster [...]

Quantum and statistical state-to-state studies of cold Ar + H2+ collisions

2025-04-28T11:13:50+02:00Tags: , , , |

Authors: Konings, Maarten; Gonzalez-Lezana, Tomas; Camps, Simen; Loreau, Jerome Journal: PHYSICAL CHEMISTRY CHEMICAL PHYSICS Publication date: 2024/08/28 DOI: 10.1039/d4cp02179g Abstract: In this work we present new state-to-state integral scattering cross sections and initial-state selected rate coefficients for the Ar-36 (S-1) + H-2(+) (X-2 Sigma(+)(g),v = 0,j) reactive system for collision energies up to 0.1 eV [...]

The temperature variation of the CH+ + H reaction rate coefficients: a puzzle finally understood?

2025-04-28T11:13:48+02:00Tags: , , , |

Authors: Jara-Toro, Rafael A.; Roncero, Octavio; Lique, Francois Journal: PHYSICAL CHEMISTRY CHEMICAL PHYSICS Publication date: 2024/08/14 DOI: 10.1039/d4cp01902d Abstract: CH+ was the first molecular ion identified in the interstellar medium and is found to be ubiquitous in interstellar clouds. However, its formation and destruction paths are not well understood, especially at low temperatures. A new [...]

A high-level ab initio study of the photodissociation of acetaldehyde

2025-04-28T11:13:47+02:00Tags: , , , |

Authors: Jaddi, A.; Marakchi, K.; Zanchet, A.; Garcia-Vela, A. Journal: JOURNAL OF CHEMICAL PHYSICS Publication date: 2024/01/14 DOI: 10.1063/5.0207362 Abstract: Acetaldehyde is a very relevant atmospheric species whose photodissociation has been extensively studied in the first absorption band both experimentally and theoretically. Very few works have been reported on acetaldehyde photodissociation at higher excitation energies. [...]

Effect of temperature on the gas-phase reaction of CH3CN with OH radicals: experimental (T=11.7-177.5 K) and computational (T=10-400 K) kinetic study

2025-04-28T11:13:37+02:00Tags: , , , |

Authors: Gonzalez, Daniel; Canosa, Andre; Martinez-Nunez, Emilio; Fernandez-Ramos, Antonio; Ballesteros, Bernabe; Agundez, Marcelino; Cernicharo, Jose; Jimenez, Elena Journal: PHYSICAL CHEMISTRY CHEMICAL PHYSICS Publication date: 2024/01/24 DOI: 10.1039/d3cp04944b Abstract: Acetonitrile (CH3CN) is present in the interstellar medium (ISM) in a variety of environments. However, at the ultracold temperatures of the ISM, radical-molecule reactions are not widely [...]

Quantum study of the CH3+ photodissociation in full-dimensional neural network potential energy surfaces

2025-04-28T11:13:23+02:00Tags: , , , |

Authors: del Mazo-Sevillano, Pablo; Aguado, Alfredo; Goicoechea, Javier R.; Roncero, Octavio Journal: JOURNAL OF CHEMICAL PHYSICS Publication date: 2024/05/14 DOI: 10.1063/5.0206895 Abstract: CH3+, a cornerstone intermediate in interstellar chemistry, has recently been detected for the first time by using the James Webb Space Telescope. The photodissociation of this ion is studied here. Accurate explicitly correlated [...]

Go to Top