Journal
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
Volume 24, Issue 38, Pages 23096-23105Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d2cp02252d
Keywords
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Funding
- ERC [638027]
- EU [730872]
- Deutsches Elektronen-Synchrotron DESY, Helmholtz Association (HGF)
- Max Planck Society
- BMBF [05K10KT2, 05K13KT2, 05K16KT3, 05K10KTB, FSP-302]
- European Unions Horizon 2020 research and innovation program under the Marie Skodowska-Curie Grant [641789]
- Clusters of Excellence Center for Ultrafast Imaging (CUI) of the Deutsche Forschungsgemeinschaft (DFG) [EXC 1074, 194651731]
- Advanced Imaging of Matter (AIM) of the Deutsche Forschungsgemeinschaft (DFG) [EXC 2056, 390715994]
- Helmholtz Gemeinschaft through the Impuls-und Vernetzungsfonds
- Netherlands Organization for Scientific Research (NWO)
- Dutch Astrochemistry Network (DAN) II [648.000.029]
- Helmholtz-ERC Recognition Award of the Helmholtz Association (HGF) [ERC-RA-0043]
- Swedish Research Council
- Swedish Foundation for Strategic Research
- UK EPSRC [EP/L005913/1, EP/T021675/1, EP/V026690/1, EP/S028617/1]
- STFC [ST/J002895/1]
- National Science Foundation [PHYS-1753324]
- Helmholtz Initiative and Networking Fund through the Young Investigators Group Program
- National Natural Science Foundation of China [11704147]
- Helmholtz-OCPC postdoctoral exchange program
- European Research Council (ERC) [638027] Funding Source: European Research Council (ERC)
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In this study, the dissociation of dications and trications of three PAHs was investigated using experimental measurements and molecular dynamics simulations. The results provided high-precision total kinetic energy release values for different fragmentation channels.
We investigated the dissociation of dications and trications of three polycyclic aromatic hydrocarbons (PAHs), fluorene, phenanthrene, and pyrene. PAHs are a family of molecules ubiquitous in space and involved in much of the chemistry of the interstellar medium. In our experiments, ions are formed by interaction with 30.3 nm extreme ultraviolet (XUV) photons, and their velocity map images are recorded using a PImMS2 multi-mass imaging sensor. Application of recoil-frame covariance analysis allows the total kinetic energy release (TKER) associated with multiple fragmentation channels to be determined to high precision, ranging 1.94-2.60 eV and 2.95-5.29 eV for the dications and trications, respectively. Experimental measurements are supported by Born-Oppenheimer molecular dynamics (BOMD) simulations.
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