Tabletop imaging using 266nm femtosecond laser pulses, for characterization of structural evolution in, single molecule, chemical reactions

29th International Conference on Photonic, Electronic, and Atomic Collisions

Ibrahim, Heide^1 ; Wales, Benji^2 ; Beaulieu, Samuel^1 ; Schmidt, Bruno E.^1 ; Thiré, Nicolas^1 ; Bisson, Éric^1 ; Hebeisen, Christoph T.^3,4 ; Wanie, Vincent^1 ; Giguére, Mathieu^1 ; Kieffer, Jean-Claude^1 ; Spanner, Michael^4 ; Bandrauk, André D.^5 ; Schuurman, Michael S.^3 ; Sanderson, Joseph^2 ; Légaré, François^1

Institut National de la Recherche Scientifique, Centre Énergie Matériaux et Télécommunications, 1650 Boulevard Lionel-Boulet, Varennes

Qc

J3X1S2, Canada^1

Department of Physics and Astronomy, University of Waterloo, 200 University Avenue West, Waterloo

ON

N2L 3G1, Canada^2

National Research Council of Canada, 100 Sussex Dr., Ottawa

ON

K1A 0R6, Canada^3

Department of Physics, University of Ottawa, 150 Louis Pasteur, Ottawa

ON

K1N 6N5, Canada^4

Laboratoir de Chimie Théorique, Universitéde Sherbrooke, Qc, Canada^5

关键词: Bond-breaking;    Coulomb explosion imaging;    Multiphoton ionization;    Proton migration;    Pulse-probe;    Single molecule;    Structural evolution;    Trajectory simulation;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/635/11/112128/pdf
DOI  :  10.1088/1742-6596/635/11/112128

来源: IOP

【 摘 要 】

We have demonstrated a generally applicable tabletop approach utilizing a 266nm femtosecond laser pulse pump, 800nm pulse probe, coupled with Coulomb explosion imaging (CEI). We have investigated two simple chemical reactions in C2H2+simultaneously: proton transfer and C=C bond-breaking, triggered by multiphoton ionization to excited states. Too and fro proton migration results are in excellent agreement with new ab initio trajectory simulations which predict isomerization timescales and pathways.