Knockout driven fragmentation of porphyrins

Abstract

We have studied collisions between tetraphenylporphyrin cations and He or Ne at center-of-mass energies in the 50-110 eV range. The experimental results were interpreted in view of Density Functional Theory calculations of dissociation energies and classical Molecular Dynamics simulations of how the molecules respond to He/Ne impact. We demonstrate that prompt atom knockout strongly contributes to the total destruction cross sections. Such impulse driven processes typically yield highly reactive fragments and are expected to be important for collisions with any molecular system in this collision energy range, but have earlier been very difficult to isolate for biomolecules.

arXiv comment6 pages, 5 figures

References in corpus (4)

• First storage of ion beams in the Double Electrostatic Ion-Ring Experiment - DESIREE
• Failure of hydrogenation in protecting polycyclic aromatic hydrocarbons from fragmentation
• Threshold Energies for Single Carbon Knockout from Polycyclic Aromatic Hydrocarbons
• Hydrogenated pyrene: Statistical single-carbon loss below the knockout threshold

Cited by in corpus (1)

• DESIREE electrospray ion source test bench and setup for Collision Induced Dissociation experiments