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Proton transfer and isotope‐induced reaction in aniline cluster ions
Author(s) -
Lengyel Jozef,
Poterya Viktoriya,
Fárník Michal
Publication year - 2015
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.3572
Subject(s) - chemistry , aniline , ion , proton , cluster (spacecraft) , kinetic isotope effect , organic chemistry , deuterium , nuclear physics , physics , computer science , programming language
The proton transfer (PT) and other intraclusters reactions occurring after electron ionization of aniline clusters (PhNH 2 ) N are investigated by the time‐of‐flight mass spectrometry. The mass spectra are recorded for different expansion conditions leading to the generation of different cluster sizes. Several fragment ions are shown to originate from intracluster reactions, namely, [Ph] + , [PhNH 3 ] + and [Ph–N–Ph] + . Reaction schemes are proposed for these ions starting with the PT process. The mass region beyond the monomer mass is dominated by cluster ions (PhNH 2 ) n + accompanied by satellites with ±H and +2H. In experiments with deuterated species, new fragment ions are identified. The aniline isotopomer d 5 ‐PhNH 2 yields the fragment ions (PhNH 2 ) n ⋅(N–Ph–NH 2 ) + . Analogical series is observed in experiments with d 7 ‐PhND 2 , and additional fragments occur corresponding to (PhND 2 ) n ⋅(D 2 N–ND–Ph–ND–ND 2 ) + ions. The possible reaction pathways to these ions and the unusual isotope effects are discussed. Copyright © 2015 John Wiley & Sons, Ltd.