Theoretical rotation–torsion spectra of HSOH

Literature Information

Publication Date 2010-06-05
DOI 10.1039/C002803G
Impact Factor 3.676
Authors

Andrey Yachmenev, Sergei N. Yurchenko, Per Jensen, Oliver Baum, Thomas F. Giesen, Walter Thiel


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Abstract

Rotation–torsion spectra of HSOH, involving the vibrational ground state and the fundamental torsional state, have been simulated at T = 300 K. The simulations are carried out with the variational computer program TROVE in conjunction with recently reported ab initio potential energy and electric dipole moment surfaces. HSOH is a near-prolate-symmetric top at equilibrium and the simulated spectra are of perpendicular-band-type with strong R-branch and Q-branch transitions. Recently, an anomalous (b-type-transition)/(c-type-transition) intensity ratio in the vibrational-ground-state rQKa-branches of HSOH has been experimentally observed. Our calculations reproduce correctly the anomaly and show that it originates in the large-amplitude torsional motion of HSOH. We analyze our theoretical results in order to explain the effect and to provide unambiguous (b/c)-type-transition assignments.

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Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics
CiteScore: 5.5
Self-citation Rate: 10.3%
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Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.

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