A full-dimensional ab initio intermolecular potential energy surface and rovibrational spectra for OC–HF and OC–DF

2021 ◽  
Vol 155 (8) ◽  
pp. 084302
Author(s):  
Qiong Liu ◽  
Lu Liu ◽  
Feng An ◽  
Jing Huang ◽  
Yanzi Zhou ◽  
...  
Keyword(s):  
Potential Energy ◽  
Potential Energy Surface ◽  
Ab Initio ◽  
Energy Surface ◽  
Intermolecular Potential ◽  
Rovibrational Spectra

scholarly journals Intermolecular Lennard-Jones (22-11)Potential Energy Surface in Dimer of N8 Cubane Cluster

2017 ◽  
Vol 59 (2) ◽  
Author(s):  
Jamshid Najafpour
Keyword(s):  
Potential Energy ◽  
Potential Energy Surface ◽  
Ab Initio ◽  
Density Functional ◽  
Energy Surface ◽  
Separation Distance ◽  
Basis Set ◽  
Intermolecular Potential ◽  
Basis Set Superposition Error ◽  
Lennard Jones

<p>We have calculated the intermolecular potential energy surface (IPES) of the dimer of cubic N8 cluster using <em>ab initio </em>and the density functional theory (DFT) calculations. The <em>ab initio </em>(HF/3- 21G(d)) and DFT (B3LYP/6-31G(d) and aug-cc-pVDZ) calculations were performed for two relative orientations of N8-N8 system as a function of separation distance between the centers of cubic N8 clusters. In this research, the IPES, <em>U</em>(<em>r</em>), of the N8-N8 system is studied, where the edge of N8 approaches to face or edge of the other considered N8. Then, the Lennard-Jones (12-6) and (22-11) adjustable parameters are fitted to the computed interaction energies for edge-face and edge-edge orientations. In this research for the first time, the IPESs proportionated to the Lennard-Jones (22-11) potential are derived that are compatible with the computed IPES curves. Assuming a set of Lennard-Jones parameters, the second virial coefficients are obtained for the N8-N8 complex at a temperature range of 298 to 1000 K. Both the corrected and uncorrected basis set superposition error (BSSE) results are presented confirming the significance of including BSSE corrections.</p>

Long-Range Complex in the HC$$_{3}$$N + CN Potential Energy Surface: Ab Initio Calculations and Intermolecular Potential

2021 ◽  
pp. 413-425
Author(s):  
Emília Valença Ferreira de Aragão ◽  
Luca Mancini ◽  
Noelia Faginas-Lago ◽  
Marzio Rosi ◽  
Nadia Balucani ◽  
...  
Keyword(s):  
Potential Energy ◽  
Potential Energy Surface ◽  
Ab Initio Calculations ◽  
Ab Initio ◽  
Long Range ◽  
Energy Surface ◽  
Intermolecular Potential
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