The photodissociation of NO2 by visible and ultraviolet light

Literature Information

Publication Date 2010-11-16
DOI 10.1039/C0CP01551B
Impact Factor 3.676
Authors

Iain Wilkinson, Ivan Anton Garcia, Benjamin J. Whitaker, Jean-Benoît Hamard, Valérie Blanchet


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Abstract

We present velocity map images of the NO, O(3PJ) and O(1S0) photofragments from NO2 excited in the range 7.6 to 9.0 eV. The molecule was initially pumped with a visible photon between 2.82–2.95 eV (440–420 nm), below the first dissociation threshold. A second ultraviolet laser with photon energies between 4.77 and 6.05 eV (260–205 nm) was used to pump high-lying excited states of neutral NO2 and/or probe neutral photoproducts. Analysis of the kinetic energy release spectra revealed that the NO photofragments were predominantly formed in their ground electronic state with little kinetic energy. The O(3PJ) and O(1S0) kinetic energy distributions were also dominated by kinetically ‘cold’ fragments. We discuss the possible excitation schemes and conclude that the unstable photoexcited states probed in the experiment were Rydberg states coupled to dissociative valence states. We compare our results with recent time-resolved studies using similar excitation and probe photon energies.

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Source Journal

Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics
CiteScore: 5.5
Self-citation Rate: 10.3%
Articles per Year: 3036

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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