Molecular bond-breaking induced by interatomic decay processes
Résumé
Selective bond-breaking in a molecule with the use of photons opens the way to control chemical reactions. We demonstrate here that dissociation of a molecule can be efficiently achieved by first photoexciting a neighboring atom or molecule. On the example of the giant He-H 2 dimer, we show that simultaneous ionization and excitation of the helium atom induces H 2 dissociation with a high probability. The excited He + ion transfers its excess energy via Interatomic Coulombic Decay (ICD) or Electron Transfer Mediated Decay (ETMD) to H 2 which is then singly or doubly ionized, respectively. In both cases, the molecular ion dissociates effectively within a few tens of femtoseconds. Molecular bond-breaking induced by ICD and ETMD are expected to be general phenomena, which provide alternatives to standard photochemistry.
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Chiang et al. - 2019 - Molecular-bond breaking induced by interatomic dec.pdf (4 Mo)
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