Bibliographic Citation
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Title | Dissociation of benzylamine ions following infrared multiple photon absorption, electron impact ionization, and UV multiphoton ionization |
Creator/Author | Catanzarite, J.H. ; Haas, Y. ; Reisler, H. ; Wittig, C. |
Publication Date | 1983 May 01 |
OSTI Identifier | OSTI ID: 6238701 |
Other Number(s) | CODEN: JCPSA |
Resource Type | Journal Article |
Resource Relation | J. Chem. Phys. ; Vol/Issue: 78:9 |
Research Org | Departments of Electrical Engineering, Physics, and Chemistry, University of Southern California, Los Angeles, California 90089-0484 |
Subject | 640304 -- Atomic, Molecular & Chemical Physics-- Collision Phenomena; ;AROMATICS-- ELECTRON-ION COLLISIONS;AROMATICS-- PHOTOIONIZATION;ELECTRON-ION COLLISIONS-- DISSOCIATION;ELECTRON-ION COLLISIONS-- IONIZATION;ORGANIC NITROGEN COMPOUNDS-- ELECTRON-ION COLLISIONS;ORGANIC NITROGEN COMPOUNDS-- PHOTOIONIZATION; ABSORPTION;INFRARED RADIATION;MOLECULAR IONS;ULTRAVIOLET RADIATION |
Related Subject | CHARGED PARTICLES;COLLISIONS;ELECTROMAGNETIC RADIATION;ELECTRON COLLISIONS;ION COLLISIONS;IONIZATION;IONS;ORGANIC COMPOUNDS;RADIATIONS |
Description/Abstract | The dissociation of benzylamine ions following (i) electron impact (EI) ionization, (ii) multiphoton ionization (MPI) at 266 nm, and (iii) infrared multiple photon absorption (IRMPA) at 9.26 ..mu..m is reported.^In the EI and MPI experiments, three competitive dissociation pathways are observed.^In the IRMPA experiments, benzylamine ions prepared by MPI at low fluences are fragmented very efficiently following irradiation with the focused output from a pulsed CO/sub 2/ laser.^However, in contrast to the EI and MPI results, the IRMPD experiments reveal only a single, lowest energy, dissociation pathway and the fragmentation pattern is consistent with a sequential mechanism in which daughter ions continue to absorb the IR radiation and dissociate.^The differences are explained by the different natures of the excitation processes: in IRMPA, the relatively slow up-pumping rate and the long rise time of the CO/sub 2/ laser pulse restrict the levels of excitation in the dissociating parent ions and favor sequential processes along the lowest energy decomposition pathways. |
Country of Publication | United States |
Language | English |
Format | Pages: 5506-5512 |
System Entry Date | 2001 May 13 |
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