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Theoretical Study of the Spectroscopic Constant and Anharmonic Force Field of PO2

Theoretical Study of the Spectroscopic Constant and Anharmonic Force Field of $PO^-_2$

Year:    2015

Author:    Pengfei Wang, Chonghai Qi, Meishan Wang, Chuanlu Yang, jing Li

Journal of Atomic and Molecular Sciences, Vol. 6 (2015), Iss. 2 : pp. 92–102

Abstract

The equilibrium structure, spectroscopy constants and anharmonic force field of PO2 anion have been investigated at MP2, B3LYP, B3P86, B3PW91 methods employing three basis sets, 6-311++G(2d,2p), 6-311++G(3df,3pd) and cc-pVQZ, respectively. The computed geometries, rotational constants, vibration-rotation interaction constants, quartic centrifugal distortion constants, and coriolis coupling constants of PO2 are compared with the available experimental or theoretical data. The fundamental frequencies, rotational constants of ground state, sextic centrifugal distortion constants, cubic and quartic force constants of PO2 are firstly predicted. The calculated results show that the B3P86/6-311++G(3df, 3pd) results are in excellent agreement with experiment and represent a substantial improvement over the results obtained from MP2. The other DFTmethods are also advisable choices to study the anharmonic force field of PO2. The predicted spectroscopic constants may provide the useful data for the experiment studies of the corresponding spectroscopic constants of PO2.

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Journal Article Details

Publisher Name:    Global Science Press

Language:    English

DOI:    https://doi.org/10.4208/jams.040315.050415a

Journal of Atomic and Molecular Sciences, Vol. 6 (2015), Iss. 2 : pp. 92–102

Published online:    2015-01

AMS Subject Headings:    Global Science Press

Copyright:    COPYRIGHT: © Global Science Press

Pages:    11

Keywords:    PO2 anion ab initio calculations spectroscopic constants anharmonic force field.

Author Details

Pengfei Wang Email

Chonghai Qi Email

Meishan Wang Email

Chuanlu Yang Email

jing Li Email