Molecular beam studies of weak interactions for open shell systems: spin-orbit dependence of the potential energy surface for atomic oxygen(3P) with hydrogen and methane

1989 ◽  
Vol 93 (1) ◽  
pp. 130-135 ◽  
Author(s):  
Vincenzo Aquilanti ◽  
Roberto Candori ◽  
Leonardo Mariani ◽  
Fernando Pirani ◽  
Giorgio Liuti
Keyword(s):  
Potential Energy ◽  
Potential Energy Surface ◽  
Atomic Oxygen ◽  
Molecular Beam ◽  
Energy Surface ◽  
Weak Interactions ◽  
Open Shell ◽  
Spin Orbit

scholarly journals Probing the location of the unpaired electron in spin–orbit changing collisions of NO with Ar

2020 ◽  
Vol 22 (39) ◽  
pp. 22289-22301
Author(s):  
Cornelia G. Heid ◽  
Imogen P. Bentham ◽  
Victoria Walpole ◽  
Razvan Gheorghe ◽  
Pablo G. Jambrina ◽  
...  
Keyword(s):  
Potential Energy ◽  
Potential Energy Surface ◽  
Unpaired Electron ◽  
Energy Surface ◽  
Spin Orbit ◽  
Selective Sampling

The ability to orient NO molecules prior to collision with Ar atoms allows selective sampling of different potential energy surface regions and elucidation of the associated collision pathways.

Calculating the Intermolecular Weak Interactions: Constructing the Potential Energy Surface of Hydrogen and Halogen Bond

Daxue Huaxue ◽  
2017 ◽  
Vol 32 (5) ◽  
pp. 44-48
Author(s):  
Heng ZHANG ◽  
◽  
Ying MA ◽  
Gang LIU ◽  
Qi-Sheng SONG ◽  
...  
Keyword(s):  
Potential Energy ◽  
Potential Energy Surface ◽  
Energy Surface ◽  
Weak Interactions ◽  
Halogen Bond

scholarly journals Exploring the potential energy surface of small lead clusters using the gradient embedded genetic algorithm and an adequate treatment of relativistic effects

RSC Advances ◽  
2018 ◽  
Vol 8 (1) ◽  
pp. 145-152 ◽  
Author(s):  
Walter A. Rabanal-León ◽  
William Tiznado ◽  
Edison Osorio ◽  
Franklin Ferraro
Keyword(s):  
Genetic Algorithm ◽  
Potential Energy ◽  
Potential Energy Surface ◽  
Crucial Role ◽  
Energy Surface ◽  
Relativistic Effects ◽  
Spin Orbit ◽  
Adequate Treatment ◽  
Structural Assignment

Theoretical inclusion of relativistic effects (scalar and spin–orbit) play a crucial role to assure an adequate structural assignment on lead clusters.

Dissection of the multichannel reaction of acetylene with atomic oxygen: from the global potential energy surface to rate coefficients and branching dynamics

2019 ◽  
Vol 21 (3) ◽  
pp. 1408-1416 ◽  
Author(s):  
Junxiang Zuo ◽  
Qixin Chen ◽  
Xixi Hu ◽  
Hua Guo ◽  
Daiqian Xie
Keyword(s):  
Potential Energy ◽  
Potential Energy Surface ◽  
Atomic Oxygen ◽  
Energy Surface ◽  
Rate Coefficient ◽  
Branching Ratio ◽  
Classical Trajectory ◽  
Rate Coefficients ◽  
Product Branching

A global potential energy surface for the O(3P) + C2H2reaction is developed and the quasi-classical trajectory study on the potential energy surface reproduce the rate coefficient and product branching ratio.

An accurate potential energy surface and ring polymer molecular dynamics study of the Cl + CH4 → HCl + CH3 reaction

2020 ◽  
Vol 22 (1) ◽  
pp. 344-353 ◽  
Author(s):  
Yang Liu ◽  
Jun Li
Keyword(s):  
Molecular Dynamics ◽  
Potential Energy ◽  
Potential Energy Surface ◽  
Energy Surface ◽  
Entrance Channel ◽  
Rate Coefficients ◽  
Spin Orbit ◽  
Ring Polymer ◽  
Ring Polymer Molecular Dynamics

Thermal rate coefficients for the Cl + CH4/CD4 reactions were studied on a new full-dimensional accurate potential energy surface with the spin–orbit corrections considered in the entrance channel.

scholarly journals Combining EXAFS and Computer Simulations to Refine the Structural Description of Actinyls in Water

Molecules ◽  
2020 ◽  
Vol 25 (22) ◽  
pp. 5250
Author(s):  
Sergio Pérez-Conesa ◽  
José M. Martínez ◽  
Rafael R. Pappalardo ◽  
Enrique Sánchez Marcos
Keyword(s):  
Potential Energy ◽  
Potential Energy Surface ◽  
Force Field ◽  
Electron Correlation ◽  
Energy Surface ◽  
Open Shell ◽  
Complex Signal ◽  
Quantum Mechanical ◽  
Structural Description ◽  
Exafs Spectra

EXAFS spectroscopy is one of the most used techniques to solve the structure of actinoid solutions. In this work a systematic analysis of the EXAFS spectra of four actinyl cations, [UO2]2+, [NpO2]2+, [NpO2]+ and [PuO2]2+ has been carried out by comparing experimental results with theoretical spectra. These were obtained by averaging individual contributions from snapshots taken from classical Molecular Dynamics simulations which employed a recently developed [AnO2]2+/+ –H2O force field based on the hydrated ion model using a quantum-mechanical (B3LYP) potential energy surface. Analysis of the complex EXAFS signal shows that both An-Oyl and An-OW single scattering paths as well as multiple scattering ones involving [AnO2]+/2+ molecular cation and first-shell water molecules are mixed up all together to produce a very complex signal. Simulated EXAFS from the B3LYP force field are in reasonable agreement for some of the cases studied, although the k= 6–8 Å−1 region is hard to be reproduced theoretically. Except uranyl, all studied actinyls are open-shell electron configurations, therefore it has been investigated how simulated EXAFS spectra are affected by minute changes of An-O bond distances produced by the inclusion of static and dynamic electron correlation in the quantum mechanical calculations. A [NpO2]+−H2O force field based on a NEVPT2 potential energy surface has been developed. The small structural changes incorporated by the electron correlation on the actinyl aqua ion geometry, typically smaller than 0.07 Å, leads to improve the simulated spectrum with respect to that obtained from the B3LYP force field. For the other open-shell actinyls, [NpO2]2+ and [PuO2]2+, a simplified strategy has been adopted to improve the simulated EXAFS spectrum. It is computed taking as reference structure the NEVPT2 optimized geometry and including the DW factors of their corresponding MD simulations employing the B3LYP force field. A better agreement between the experimental and the simulated EXAFS spectra is found, confirming the a priori guess that the inclusion of dynamic and static correlation refine the structural description of the open-shell actinyl aqua ions.

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