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Internal energy content of n ‐butylbenzene, bromobenzene, iodobenzene and aniline molecular ions generated by two‐photon ionization at 266 nm. A photodissociation study
Author(s) -
Yoon Oh Kyu,
Hwang Wan Goo,
Choe Joong Chul,
Kim Myung Soo
Publication year - 1999
Publication title -
rapid communications in mass spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.528
H-Index - 136
eISSN - 1097-0231
pISSN - 0951-4198
DOI - 10.1002/(sici)1097-0231(19990730)13:14<1515::aid-rcm678>3.0.co;2-r
Subject(s) - iodobenzene , chemistry , photodissociation , ion , ionization , internal energy , kinetic energy , polyatomic ion , photoionization , mass spectrometry , chemical ionization , ionization energy , photochemistry , atomic physics , analytical chemistry (journal) , organic chemistry , physics , chromatography , quantum mechanics , catalysis
A technique to investigate photodissociation kinetics on a nanosecond time scale has been devised for molecular ions generated by multiphoton ionization (MPI) using mass‐analyzed ion kinetic energy spectrometry. The branching ratio or rate constant has been determined for the photodissociation of the n ‐butylbenzene, bromobenzene, iodobenzene, and aniline molecular ions generated by MPI at 266 nm. The ion internal energies have been estimated by comparing the measured kinetic data with the previous energy dependence data. The analysis has shown that only those molecular ions generated by two‐photon ionization contribute to the photodissociation signals. Around half of the available energy has been found to remain as molecular ion internal energy in the two‐photon ionization process. Copyright © 1999 John Wiley & Sons, Ltd.