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Internal energy distribution of benzene molecular ions in surface‐induced dissociation
Author(s) -
Vékey Károly,
Somogyi Árpád,
Wysocki Vicki H.
Publication year - 1995
Publication title -
journal of mass spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.475
H-Index - 121
eISSN - 1096-9888
pISSN - 1076-5174
DOI - 10.1002/jms.1190300132
Subject(s) - chemistry , internal energy , monolayer , excited state , kinetic energy , projectile , ion , dissociation (chemistry) , benzene , excitation , atomic physics , analytical chemistry (journal) , photochemistry , organic chemistry , thermodynamics , biochemistry , physics , materials science , quantum mechanics , electrical engineering , metallurgy , engineering
The so‐called ‘deconvolution’ method has been used to determine the internal energy distribution of molecular ions of an organic compound, benzene, excited by collisions with self‐assembled monolayer surfaces formed on gold. The average internal energy was found to increase linearly with the laboratory collision energy. The kinetic energy–internal energy (T–V) conversion was 17% for the octadecanethiolate monolayer and 28% for the 2‐(perfluorooctyl)‐ethanethiolate monolayer surface. The results are similar to those obtained for metal carbonyl projectiles, though they indicate somewhat higher energy conversion. In addition, excitation of the projectile ion well beyond 20 eV internal energy is observed.