Gas-Phase Scattering of Transition Metal Atoms Fe, Ir, and Pt with CH4, O2, and CO2
Dong Yan1, Yujie Ma1, Jiaxing Liu1
1Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), Fudan University, Shanghai 200438, China.
Abstract:
Understanding the interactions between transition metal atoms and molecules is important for the study of various related chemical and physical processes. In this study, we have investigated collisions between iron (Fe), iridium (Ir), and platinum (Pt) and the small molecules CH4, O2, and CO2 using a crossed-beam and time-sliced ion velocity map imaging technique. Elastic collisions were observed in all cases, except for collisions of Pt with O2 and CO2. Collisions of Fe or Ir with CH4, O2, and CO2 show mainly long-range attractive potentials at large impact parameters leading to forward scattering, whereas sideways and backward scatterings indicate the formation of short-lived complexes with lifetimes comparable to their rotational periods. In collisions of Pt with O2 and CO2, Pt may react with the gases and become chemically bound to them, which can deplete the nonreactive scattering signal. The insights gained from this study provide a foundation for improved understanding of the complex interactions between transitional metal atoms and other molecules.
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