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Resonant Electron Capture Mass Spectra of Fullerenes C 60 and C 70
Author(s) -
Vasil'ev Yury V.,
Tuktarov Renat F.,
Mazunov Victor A.
Publication year - 1997
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(19970422)11:7<757::aid-rcm858>3.0.co;2-4
Subject(s) - chemistry , fullerene , electron , ion , yield (engineering) , atomic physics , spectral line , mass spectrum , analytical chemistry (journal) , physics , organic chemistry , quantum mechanics , astronomy , thermodynamics
Resonant electron capture by C 60 and C 70 was studied and it was established that long‐lived (i.e. mass spectrometrically observable) parent negative ions are formed within an extremely broad energy region (0–14 eV). It has been shown that effective yield curves of C 60 − and C 70 − in the thermal energy region have resonant peaks at 0.05 ± 0.01 and 0.06 ± 0.01 eV, respectively. Owing to the higher energy resolution than in previously published experiments, it was possible to observe another resonant state at ca . 0 eV for both fullerenes (as a shoulder on the effective yield curve). This gives evidence of the possibility of s ‐electron attachment by the fullerenes. A correlation between electron capture, electron loss energy and photoelectron spectra was found. At 6.5 eV and above, C 60 − and C 70 − are subject to electron autodetachment and mean lifetime and mean decay rates were directly measured. © 1997 John Wiley & Sons, Ltd.