Aminophenol isomers unraveled by conformer-specific far-IR action spectroscopy

Literature Information

Publication Date 2016-02-01
DOI 10.1039/C5CP07426F
Impact Factor 3.676
Authors

Daniël J. Bakker, Raimund Feifel, Anouk M. Rijs, Vitali Zhaunerchyk


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Abstract

Spectroscopic studies of molecular structure can strongly benefit from extending the conventional mid-IR range to the far-IR and THz regions, as low-frequency molecular vibrations provide unique fingerprints and high sensitivity to intra- and intermolecular interactions. In this work, the gas-phase conformer specific far-IR spectra of aminophenol isomers, recorded in the spectral range of 220–800 cm−1 at the free-electron laser laboratory FELIX in Nijmegen (the Netherlands), are reported. Many distinct far-IR vibrational signatures which are specific for the molecular structure of the different aminophenol isomers are revealed and assigned. The observed far-IR transitions of the NH2 wagging (inversion) motion have been treated with a double-minimum harmonic well potential model that has enabled us to obtain the inversion barrier values. Moreover, we discuss the limitations and capability of conventional DFT frequency calculations to describe the far-IR vibrational modes.

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Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics
CiteScore: 5.5
Self-citation Rate: 10.3%
Articles per Year: 3036

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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