title: Fragmentation dynamics of meso-tetraphenyl iron (III) porphyrin chloride dication under energy control.
abstract: Meso-tetraphenyl iron (III) porphyrin chloride dications (FeTPPCl2+)*were prepared in collisions with F+and H+at 3 keV. The dominant fragmentation channels were observed to involve the loss of the Cl atom and the successive loss of neutral phenyl groups for both collisional systems. The mass spectra in correlation with the deposited excitation energy distributions of the parent ions for the main fragmentation channels were measured by using the collision induced dissociation under energy control method. The global excitation energy distribution was found to be shifted to lower energies in collisions with H+compared to collisions with F+showing a noteworthy change of the excitation energy window using different projectile ions. Partial excitation energy distributions of the parent ions FeTPPCl2+were obtained for each fragmentation group. In a theoretical work, we have calculated the dissociation energies for the loss of one and two phenyl groups, including phenyl and (phenyl ± H). The energy barrier for the hydrogen atom transfer during the loss of (phenyl-H) has been also calculated. The measured energy difference for the successive loss of two phenyl groups was compared with the theoretical values.
authors.affiliation: Institut Lumière Matière, UMR5306 Université Claude Bernard Lyon 1-CNRS, Université de Lyon, 69622 Villeurbanne cedex, France.
authors.forename: B
authors.initials: B
authors.lastname: Li
authors.affiliation: Institut Lumière Matière, UMR5306 Université Claude Bernard Lyon 1-CNRS, Université de Lyon, 69622 Villeurbanne cedex, France.
authors.forename: A R
authors.identifier: 0000000307254057
authors.initials: AR
authors.lastname: Allouche
authors.affiliation: Institut Lumière Matière, UMR5306 Université Claude Bernard Lyon 1-CNRS, Université de Lyon, 69622 Villeurbanne cedex, France.
authors.forename: J
authors.initials: J
authors.lastname: Bernard
authors.affiliation: Institut Lumière Matière, UMR5306 Université Claude Bernard Lyon 1-CNRS, Université de Lyon, 69622 Villeurbanne cedex, France.
authors.forename: R
authors.initials: R
authors.lastname: Brédy
authors.affiliation: Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China.
authors.forename: D B
authors.initials: DB
authors.lastname: Qian
authors.affiliation: Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China.
authors.forename: X
authors.initials: X
authors.lastname: Ma
authors.affiliation: Institut Lumière Matière, UMR5306 Université Claude Bernard Lyon 1-CNRS, Université de Lyon, 69622 Villeurbanne cedex, France.
authors.forename: S
authors.initials: S
authors.lastname: Martin
authors.affiliation: Institut Lumière Matière, UMR5306 Université Claude Bernard Lyon 1-CNRS, Université de Lyon, 69622 Villeurbanne cedex, France.
authors.forename: L
authors.initials: L
authors.lastname: Chen