title: Reaction of hydrogen gas with C60 at elevated pressure and temperature: hydrogenation and cage fragmentation.
abstract: Products of the reaction of C(60) with H(2) gas have been monitored by high-resolution atmospheric pressure photoionization Fourier transform ion cyclotron resonance mass spectrometry (APPI FT-ICR MS), X-ray diffraction, and IR spectroscopy as a function of hydrogenation period. Samples were synthesized at 673 K and 120 bar hydrogen pressure for hydrogenation periods between 300 and 5000 min, resulting in the formation of hydrofullerene mixtures with hydrogen content ranging from 1.6 to 5.3 wt %. Highly reduced C(60)H(x) (x > 36-40) and products of their fragmentation were identified in these samples by APPI FT-ICR MS. A sharp change in structure was observed for samples with at least 5.0 wt % of hydrogen. Low-mass (300-500 Da) hydrogenation products not observed by prior field desorption (FD) FT-ICR MS were detected by APPI FT-ICR MS and their elemental compositions obtained for the first time. Synthetic and analytical fragmentation pathways are discussed.
authors.affiliation: Department of Physics, Umeå University, 901 87 Umeå, Sweden. alexandr.talyzin@physics.umu.se
authors.forename: Alexandr V
authors.initials: AV
authors.lastname: Talyzin
authors.forename: Yury O
authors.initials: YO
authors.lastname: Tsybin
authors.forename: Jeremiah M
authors.initials: JM
authors.lastname: Purcell
authors.forename: Tanner M
authors.initials: TM
authors.lastname: Schaub
authors.forename: Yury M
authors.initials: YM
authors.lastname: Shulga
authors.forename: Dag
authors.initials: D
authors.lastname: Noréus
authors.forename: Toyoto
authors.initials: T
authors.lastname: Sato
authors.forename: Andrzej
authors.initials: A
authors.lastname: Dzwilewski
authors.forename: Bertil
authors.initials: B
authors.lastname: Sundqvist
authors.forename: Alan G
authors.initials: AG
authors.lastname: Marshall