Adiabatic ionization energies of the overlapped A2A1 and B2E electronic states in CH3Cl+/CH3F+ measured with double imaging electron/ion coincidence

Literature Information

Publication Date 2015-05-27
DOI 10.1039/C5CP02105G
Impact Factor 3.676
Authors

Xiaofeng Tang, Gustavo A. Garcia, Laurent Nahon


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Abstract

Utilizing the vacuum ultraviolet (VUV) synchrotron radiation and a double imaging photoelectron photoion coincidence (i2PEPICO) technique, we have measured the adiabatic ionization energies (AIEs) of the overlapped A2A1 and B2E electronic states of CH3Cl+ and CH3F+ ions. We show that the two overlapped electronic states can be separated in the electron and ion kinetic energy correlation diagrams based on their state-specific dissociation dynamics, leading to different kinetic energies released in dissociation, along the CH3+ fragmentation channel. Thus the correlation diagrams yielded values of 13.67 ± 0.03 and 14.77 ± 0.03 eV for the AIEs of the A2A1 and B2E states of CH3Cl+, and 16.08 ± 0.03 and 17.00 ± 0.05 eV for CH3F+, respectively. This method can be generalized to separate ionic states that are otherwise overlapped in normal photoelectron spectra (PES), especially by combining VUV sources and electron/ion coincidence techniques.

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Source Journal

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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