The UV-photodissociation of jet-cooled nitrosobenzene studied by fluorescence excitation spectroscopy of the NO fragment
Literature Information
Angela Keßler, Alkwin Slenczka, Reinhold Seiler, Bernhard Dick
Monomeric nitrosobenzene was cooled in a supersonic jet and photolyzed with a tunable laser by excitation into the first and second UV absorption bands corresponding to the second and higher excited singlet states (Sn, n2). The populations of the rotational and vibrational states of the NO fragment were probed by fluorescence excitation spectroscopy with a second laser. No alignment of the photofragment could be observed, and the Doppler profiles indicate an isotropic velocity distribution. It is concluded that the dissociation occurs after fast internal conversion to the potential energy surfaces of the electronic states S0 or S1 which correlate both with the electronic ground states of the products. A strong preference for the A″ component of the Λ-doublets is observed. If orbital symmetry is conserved, the plane of rotation of the NO fragment is perpendicular to the plane of the phenyl radical, i.e. dissociation occurs from a highly excited torsional state in a propeller-like motion.
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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.












![5-Bromoimidazo[1,2-a]pyridine structure 5-Bromoimidazo[1,2-a]pyridine structure](https://static.chemtradehub.com/structs/692/69214-09-1-d8e2.webp)

