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Phys. Chem. Chem. Phys. 25, 31118(2023) 

Fragmentation Channels of Non-Fullerene Cationic Carbon Clusters

Piero Ferrari1, Klavs Hansen2,3,*, Ozan Lacinbala1, Ewald Janssens1and Peter Lievens1

Quantum Solid-State Physics, Department of Physics and Astronomy, KU Leuven, 3001 Leuven, Belgium

Center for Joint Quantum Studies and Department of Physics, School of Science, Tianjin University, 92 Weijin Road, Tianjin 300072, China

Lanzhou Center for Theoretical Physics, Key Laboratory of Theoretical Physics of Gansu Province, Lanzhou University, Lanzhou, Gansu 730000, China

* klavshansen@tju.edu.cn

Abstract

The unimolecular fragmentation channels of highly excited small cationic carbon clusters have been measured with a time-of-flight mass spectrometer  after photofragmentation. The dominant channel is loss of the neutral trimer, for all CN+N=10–27 clusters except for N=11, 12 which decay by monomer  emission, and C25+ which shows competing loss of C2 and C3. The results  permit to quantify the role of rotational entropy in the competition between  monomer and trimer decays with the help of energies calculated with density functional theory.


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