Ultrafast photochemistry with two product channels: Wavepacket motion through two distinct conical intersections

Riedle, Eberhard ; Roos, Matthias K.; Thallmair, Sebastian; Sailer, Christian F.; Krebs, Nils; Fingerhut, Benjamin P. und Vivie-Riedle, Regina de (2017): Ultrafast photochemistry with two product channels: Wavepacket motion through two distinct conical intersections. In: Chemical Physics Letters, Bd. 683: S. 128-134

Abstract

Light induced bond cleavage is an ubiquitous process in large molecules, yet its quantum nature is not fully understood. We present a comprehensive description of the ultrafast light induced CACl bond cleavage in diarylmethyl chlorides combining femtosecond transient absorption measurements with ab initio calculations. We observe a delayed appearance of radicals (80 fs) and cations (125 fs). The excited state wavepacket moves initially toward two conical intersections and the passing through these intersections determines the partitioning into the differing product channels. Different locations of the conical intersections explain the observed delay times.

• Dokumententyp: Zeitschriftenartikel
• Fakultät: Physik ; Chemie und Pharmazie > Department Chemie
• Themengebiete: 500 Naturwissenschaften und Mathematik > 530 Physik ; 500 Naturwissenschaften und Mathematik > 540 Chemie
• ISSN: 0009-2614
• Sprache: Englisch