Characterisation of the electronic structure of some stable nitroxyl radicals using variable energy photoelectron spectroscopy

Literature Information

Publication Date 2014-04-02
DOI 10.1039/C4CP00867G
Impact Factor 3.676
Authors

Branka Kovač, Ivan Ljubić, Antti Kivimäki, Marcello Coreno, Igor Novak


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Abstract

The photoionization of three stable nitroxyl radicals has been studied in the valence and core regions using synchrotron radiation. We observed different variations of the relative band intensities with the photon energy for two pyrrolidine nitroxyls (nitroxyl8 and nitroxyl9) in the valence ionization region. This is due to strong intramolecular interactions between the amide substituent and the ring π-orbital when present. In the core ionization region we observed chemical shifts which were consistent with the relative electron affinities of different atoms. We also observed the multiplet splitting of core level binding energies in the final ionic states. The core electron binding energies calculated via the restricted open shell Hartree–Fock based ΔSCF method exhibit good agreement with the experimental core ionization bands and with the assignment of the spectra by empirical analysis.

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DOI: 10.1039/C7QO90037F

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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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