Multiphoton ionization/dissociation dynamics of formyl fluoride by velocity mapping ion imaging

Literature Information

Publication Date 2009-07-30
DOI 10.1039/B903688A
Impact Factor 3.676
Authors

Fengyan Wang, Yongwei Zhang, Hua Wang, Jie Liu, Bo Jiang, Xiuyan Wang, Xueming Yang


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Abstract

The dissociation dynamics of HFCO+ ion has been studied using the velocity map ion imaging technique. The HFCO+ ion is prepared by one-photon resonant three-photon ionization in the region of 43100–43860 cm−1 excitation energy. The HFCO+ ions, produced by multiphoton ionization, have sufficient internal energy to dissociate into the F and HCO+ fragments without further absorption of another photon. Images of HCO+ have been recorded at various excitation energies. It is noticed that the angular distributions of HCO+ change dramatically from parallel distribution to perpendicular distribution and then back to parallel distribution in a very narrow excitation energy region of 43 473–43 500 cm−1. Analysis of anisotropy parameters of βn (n = 2, 4 and 6) reveals that the electronic states in the three-photon excitation of HFCO are mainly: HFCO(X1A′) → HFCO(A1A″) → HFCO(A′) → HFCO+(A2A″;B2A′). The purely perpendicular resonant transitions are likely responsible for the perpendicular angular distribution of the HCO+ ion fragment.

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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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