Evidence for quantum effects in laser driven photodissociation of methylamines Conference Paper uri icon

abstract

  • Non-adiabatic dynamics at conical intersections (CI) extensively affects the photostability of biomolecules by efficiently photoinducing decay routes that dissipate harmful excess ultraviolet energy. Here the photodissociation of the model test molecules, methylamine (CH3NH 2) and its partially deuterated isotopologue (CD3NH 2), excited to different specific vibrational modes in the electronically excited state has been investigated by H (D) photofragments detection with two-color reduced-Doppler ion imaging. The H products, resulting from NH bond cleavage via two dissociation pathways, showed anomalous distributions for some of the vibronic states, as indicated by dynamic resonances in the product branching ratio and in the anisotropy parameters. This vibronic-specific control is attributed to distinctive dynamical interferences of the initially prepared wavepackets …

publication date

  • January 1, 2015