Vibrational spectra of small silicon monoxide cluster cations measured by infrared multiple photon dissociation spectroscopy
Literature Information
Etienne Garand, Daniel Goebbert, Gabriele Santambrogio, Ewald Janssens, Peter Lievens, Gerard Meijer, Knut R. Asmis
The first gas-phase infrared spectra of silicon monoxide cations (SiO)n+, n = 3–5, using multiple photon dissociation in the 550–1250 cm−1 frequency range, are reported. All clusters studied here fragment via loss of a neutral SiO unit. The experimental spectra are compared to simulated linear absorption spectra from calculated low energy isomers for each cluster. This analysis indicates that a “ring” isomer is the primary contributor to the (SiO)3+ spectrum, that the (SiO)4+ spectrum results from two close-lying bicyclic ring isomers, and that the (SiO)5+ spectrum is from a bicyclic ring with a central, fourfold-coordinated Si atom. Experiment and theory indicate that the energies and energetic orderings of (SiO)n+ isomers differ from those for neutral (SiO)n clusters.
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Physical Chemistry Chemical Physics

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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