Ultrafast Nonadiabatic Cascade and Subsequent Photofragmentation of Extreme Ultraviolet Excited Caffeine Molecule

Alexandre Marciniak, Kaoru Yamazaki, Satoshi Maeda, Maurizio Reduzzi, Victor Despré, Marius Hervé, Mehdi Meziane, Thomas A. Niehaus, Vincent Loriot, Alexander I. Kuleff, Baptiste Schindler, Isabelle Compagnon, Guiseppe Sansone, Franck Lépine

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

Ultrafast XUV chemistry is offering new opportunities to decipher the complex dynamics taking place in highly excited molecular states and thus better understand fundamental natural phenomena as molecule formation in interstellar media. We used ultrashort XUV light pulses to perform XUV pump-IR probe experiments in caffeine as a model of prebiotic molecule. We observed a 40 fs decay of excited cationic states. Guided by quantum calculations, this time scale is interpreted in terms of a nonadiabatic cascade through a large number of highly correlated states. This shows that the correlation driven nonadiabatic relaxation seems to be a general process for highly excited states, which might impact our understanding of molecular processing in interstellar media.

Original languageEnglish
Pages (from-to)6927-6933
Number of pages7
JournalJournal of Physical Chemistry Letters
Volume9
Issue number24
DOIs
Publication statusPublished - 2018 Dec 20

ASJC Scopus subject areas

  • Materials Science(all)
  • Physical and Theoretical Chemistry

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