Dr Jemma Gibbard jemma.gibbard@durham.ac.uk
Royal Society University Research Fellow
Photoelectron Imaging Study of the Diplatinum Iodide Dianions [Pt2I6]2– and [Pt2I8]2–
Gibbard, Jemma A.; Verlet, Jan R.R.
Authors
Professor Jan Verlet j.r.r.verlet@durham.ac.uk
Professor
Abstract
Photoelectron spectroscopy has been used to study the electronic structure, photodetachment, and photodissociation of the stable diplatinum iodide dianions [Pt2I6]2– and [Pt2I8]2–. Photoelectron spectra over a range of photon energies show the characteristic absence of low kinetic energy photoelectrons expected for dianions as a result of the repulsive Coulomb barrier (RCB). Vertical detachment energies of ∼1.6 and ∼1.9 eV and minimum RCBs of ∼1.2 and ∼1.3 eV are reported for [Pt2I6]2– and [Pt2I8]2–, respectively. Both of the diplatinum halides exhibit three direct detachment channels with distinct anisotropies, analogous to the previously reported spectra for PtI2– and PtI–, suggesting a platinum-centered molecular core that dominates the photodetachment. Additionally, evidence for two-photon photodissociation and subsequent photodetachment channels producing I– are observed for both dianions. Finally, an unexplained feature is observed at photon energies around 3 eV, whose origin is considered. Our work highlights the complex electronic structure of the heavy platinum-halide dianions that are characterized by a dense manifold of electronic states.
Citation
Gibbard, J. A., & Verlet, J. R. (2022). Photoelectron Imaging Study of the Diplatinum Iodide Dianions [Pt2I6]2– and [Pt2I8]2–. The Journal of Physical Chemistry A, 126(22), https://doi.org/10.1021/acs.jpca.2c02008
Journal Article Type | Article |
---|---|
Online Publication Date | May 27, 2022 |
Publication Date | 2022 |
Deposit Date | Jul 18, 2022 |
Publicly Available Date | Jul 18, 2022 |
Journal | The Journal of Physical Chemistry A |
Print ISSN | 1089-5639 |
Electronic ISSN | 1520-5215 |
Publisher | American Chemical Society |
Peer Reviewed | Peer Reviewed |
Volume | 126 |
Issue | 22 |
DOI | https://doi.org/10.1021/acs.jpca.2c02008 |
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Publisher Licence URL
http://creativecommons.org/licenses/by/4.0/
Copyright Statement
This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
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