Infrared Stark and Zeeman spectroscopy of OH–CO: The entrance channel complex along the OH + CO → trans-HOCO reaction pathway

Brice, Joseph T.; Liang, Tao; Raston, Paul L.; McCoy, Anne B.; Douberly, Gary E.

doi:10.1063/1.4963226

Title: Infrared Stark and Zeeman spectroscopy of OH–CO: The entrance channel complex along the OH + CO → trans-HOCO reaction pathway

Journal Article · Tue Sep 27 00:00:00 EDT 2016 · Journal of Chemical Physics

DOI:https://doi.org/10.1063/1.4963226· OSTI ID:1409062

Brice, Joseph T. ^[1]; Liang, Tao ^[1];

^[2]; McCoy, Anne B. ^[3];

^[1]

Univ. of Georgia, Athens, GA (United States)
James Madison Univ., Harrisonburg, VA (United States)
Univ. of Washington, Seattle, WA (United States)

Here, sequential capture of OH and CO by superfluid helium droplets leads exclusively to the formation of the linear, entrance-channel complex, OH-CO. This species is characterized by infrared laser Stark and Zeeman spectroscopy via measurements of the fundamental OH stretching vibration. Experimental dipole moments are in disagreement with ab initio calculations at the equilibrium geometry, indicating large-amplitude motion on the ground state potential energy surface. Vibrational averaging along the hydroxyl bending coordinate recovers 80% of the observed deviation from the equilibrium dipole moment. Inhomogeneous line broadening in the zero-field spectrum is modeled with an effective Hamiltonian approach that aims to account for the anisotropic molecule-helium interaction potential that arises as the OH-CO complex is displaced from the center of the droplet.

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Research Organization:: Univ. of Georgia, Athens, GA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences, and Biosciences Division

Grant/Contract Number:: SC0008086; FG02-12ER16298

OSTI ID:: 1409062

Alternate ID(s):: OSTI ID: 1328586

Journal Information:: Journal of Chemical Physics, Vol. 145, Issue 12; ISSN 0021-9606

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 6 works

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