title: Composition of hydrofullerene mixtures produced by C(60) reaction with hydrogen gas revealed by high-resolution mass spectrometry.
abstract: Complex solid hydrofulleride mixtures were synthesized by prolonged hydrogenation of C(60) at 120 bar hydrogen pressure, 673 K temperature, and different reaction periods. The high degree of hydrogenation was confirmed by infrared spectroscopy and X-ray diffraction. The identity of hydrogenation products was determined by high-resolution field desorption/ionization Fourier transform ion cyclotron resonance mass spectrometry. Despite partial gas-phase fragmentation of hydrofullerene ions during mass analysis, the data suggest that the synthesized mixtures consist of mostly C(58-60)H(x) hydrofullerenes. Increasing the duration of hydrogenation results in synthesis of C(59)H(x) and C(58)H(x) as major products. Possible hydrofullerene fragmentation pathways during both material synthesis and mass spectrometric analysis are discussed. Gas-phase fragmentation in the mass spectrometer arises from hydrofullerene ions C(60)H(x)(+) with x > 40 and C(59)H(44)(+) with drastically decreased molecular stability relative to the known C(60)H(36).
authors.affiliation: Department of Physics, Umeå University, 901 87 Umeå, Sweden, Ion Cyclotron Resonance Program, National High Magnetic Field Laboratory, Tallahassee, Florida 32310-4005, USA. alexandr.talyzin@physics.umu.se
authors.forename: Alexander V
authors.initials: AV
authors.lastname: Talyzin
authors.forename: Yury O
authors.initials: YO
authors.lastname: Tsybin
authors.forename: Tanner M
authors.initials: TM
authors.lastname: Schaub
authors.forename: Philippe
authors.initials: P
authors.lastname: Mauron
authors.forename: Yury M
authors.initials: YM
authors.lastname: Shulga
authors.forename: Andreas
authors.initials: A
authors.lastname: Züttel
authors.forename: Bertil
authors.initials: B
authors.lastname: Sundqvist
authors.forename: Alan G
authors.initials: AG
authors.lastname: Marshall