Strong quantum coupling between O-H+-O stretch and flanking group motions in (CH3OH)2H+ Part II: Tuning the coupling via isotopologues

Tan, Jake Acedera

Permalink

https://hdl.handle.net/2142/91210 Copy

Description

Title

Strong quantum coupling between O-H+-O stretch and flanking group motions in (CH3OH)2H+ Part II: Tuning the coupling via isotopologues

Author(s)

Tan, Jake Acedera

Contributor(s)

Kuo, Jer-Lai

Issue Date

2016-06-23

Keyword(s)

Clusters/Complexes

Abstract

The vibrational coupling between O-H$^{+}$-O/O-D$^{+}$-O stretch and flanking group motions were explored in the following isotopologues: \chem{(CH_3OH)_2H^+}, \chem{(CD_3OH)_2H^+}, \chem{(CH_3OD)_2D^+}, and \chem{(CD_3OD)_2D^+}. At present only measurements for \chem{(CH_3OH)_2H^+} are available in the literature.\footnote{J.R. Roscioli, L.R. McCunn and M.A. Johnson. Science 2007, 316, 249}$^{-}$ \footnote{T.D. Fridgen, L. Macaleese, T.B McMahon, J. Lemaire and P. Maitre. Phys. Chem. Chem. Phys. 2006, 8, 955-966} Reduced-dimensional calculations were performed by solving several vibrational Schrödinger equations using the method of Discrete Variable Representation (DVR) with harmonic oscillator as basis. Both potential and dipole moment surfaces were constructed at MP2/aug-cc-pVDZ by scanning along normal modes corresponding to: 1) O-H$^{+}$-O/O-D$^{+}$-O stretch, 2) out-of-phase C-O stretch, 3) in-plane \chem{CH_3}/\chem{CD_3} rock, 4) out-of-plane \chem{CH_3}/\chem{CD_3} rock, and 5) O-O stretch. It was found that vibrational states for isotopologues corresponding to O-H$^{+}$-O are more mixed than that of the O-D$^{+}$-O. Lastly, we proposed tentative assignments for the simulated spectrum and hope that experimental measurements will be available in the near future.

Publisher

International Symposium on Molecular Spectroscopy

Type of Resource

text

Language

En

Permalink

http://hdl.handle.net/2142/91210

Copyright and License Information

Copyright 2016 by the authors

Owning Collections