Photofragmentation of C60 in the extreme ultraviolet: statistical analysis on the appearance energies of C60−2nz+ (n ≥ 1, z = 1–3)

Literature Information

Publication Date 2004-11-24
DOI 10.1039/B416503A
Impact Factor 3.676
Authors

Junkei Kou, Takanori Mori, Yoshihiro Kubozono


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Abstract

The ion yield curves for C60−2nz+ (n = 1–5, z = 1–3) produced by photoionization of C60 are measured in the photon energy (hν) range of 25–150 eV. The appearance hν values are higher by 30–33 eV than the thermochemical thresholds for dissociative ionization of C60 leading to C60−2nz+. Evaluation is made on the upper limits of the internal energies of the primary C60z+ above which C60−2n+2z+ fragments (n ≥ 1) cannot escape from further dissociating into C60−2nz+ + C2. These upper limits agree well with the theoretical internal energies of C60z+ corresponding to the threshold for the formation of C60−2nz+. The photofragmentation of C60z+ is considered to be governed by the mechanism of internal conversion of the electronically excited states of C60z+, statistical redistribution of the excess energy among a number of vibrational modes, and sequential ejection of the C2 units.

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Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics
CiteScore: 5.5
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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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