Freiburg 2024 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 4: Coulomb-explosion Imaging (joint session MO/A)
A 4.5: Vortrag
Montag, 11. März 2024, 12:15–12:30, HS 3044
Understanding fragmentation dynamics of difluorodiiodomethane — •Nidin Vadassery1,3, Ivo Vinklárek1, Sebastian Trippel1, 2, and Jochen Küpper1,2,3 — 1Center for Free-Electron Laser Science, Deutches Elektronen-Synchrotron DESY, Hamburg, Germany — 2Department of Physics, Universität Hamburg — 3Department of Chemistry, Universität Hamburg
Unimolecular photo-fragmentation is prevalent in the many chemical reactions that affect the environment, like ozone depletion, synthesis of oxidative hydrocarbons, formation of aerosol particles, etc. [1]. The photo-dissociation of man-made and naturally occuring polyhalohydrocarbons is among the major causes which contribute to such climate-impacting reactions. Difluorodiiodomethane (CF2I2) one such example of polyhalohydorcarbon shows unconventional dynamics near dissociative energies [2]. Here, we present our experimental result of exploring the dissociation dynamics of CF2I2 using near-infrared laser pulses. A pure sample of CF2I2 was produced using the deflector in the eCOMO endstation [3]. We show capability of the end-station to reveal metastable states and unravel the complex quantum-state-specific dynamics during photo-fragmentation.
[1] J. C. G. Martin, et al., J. Am. Chem. Soc. 144, 9240 (2022).
[2] P. Z. El-Khoury, et al., J. Chem. Phys. 132, 124501 (2010).
[3] I. S. Vinklárek, et int. (3 authors), J. Küpper, S. Trippel, arXiv:2308.08006 [physics] (2023).