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Collision energy‐dependent fragmentation of the fullerene ions C 60 + and C 70 + using air as target gas
Author(s) -
Nishimura Toshihide,
Arakawa Ryuichi
Publication year - 1999
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/(sici)1096-9888(199903)34:3<175::aid-jms781>3.0.co;2-c
Subject(s) - chemistry , fragmentation (computing) , fullerene , ion , kinetic energy , dissociation (chemistry) , internal energy , cluster (spacecraft) , atomic physics , collision induced dissociation , dipole , chemical physics , mass spectrometry , organic chemistry , thermodynamics , tandem mass spectrometry , chromatography , physics , quantum mechanics , computer science , programming language , operating system
The variation of relative cross‐sections for the collisionaldissociation of C 60 + to the large fragmentfullerene ions C 58 + , C 56 + and C 54 + with air astarget gas revealed a possible contribution of a C 2 and/or direct C 2 n evaporationreaction requiring no activation energy due to the ion–dipoleinteraction. The small carbon‐cluster ions {C y + } were found to be formed from theirparent fullerene ions accompanied by almost the same kinetic energylosses prior to fragmentation regardless of their size, which isconsistent with the concurrent formation mechanism of smallcarbon‐cluster ions {C y + } in a narrow internal state and/or energy of C 60 + and C 70 + . Thecollision energy dependence of C 60 + withregard to the relative abundance of its fragment ions suggested aconsiderable variation in structure beyond the parent‐ionaverage internal energy of ca 80 eV, which coincided with theinternal energy of C 60 + equal to thebeginning of the Pretzel phase. © 1999 John Wiley & Sons,Ltd.