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- W2017705407 abstract "The stepwise elimination of hydrogen atoms from nine polycyclic aromatic hydrocarbons (PAHs) was investigated by the collision-induced dissociation of the sustained off-resonance irradiation (SORI-CID) technique of Fourier transform ion cyclotron resonance mass spectrometry. In every case the application of sequential SORI-CID resulted in the predominant loss of a single hydrogen atom from the parent ions, and for coronene, perylene, and benz[a]anthracene, this eventually produced pure carbon cluster ions Cn·+. No carbon cluster ions were observed for small PAHs because of competing fragmentations or insufficient intensities of the parent ions. As a common feature of the larger polycyclic aromatic hydrocarbons studied, hydrogenated carbon cluster ions CnH5+ were produced smoothly after elimination of five hydrogen atoms (from pyrene, C16H10, and fluorene, C13H10) or of seven hydrogen atoms (from coronene, C24H12, perylene, C20H12, benz[a]anthracene, C18H12, chrysene, C18H12, and triphenylene, C18H12). However, uncomplicated further loss of hydrogen atoms to produce cluster ions CnH4·+ (or CnH3+) was observed only for benz[a]anthracene, chrysene, and triphenylene. The different dissociations of CnHx+ with odd and even numbers of hydrogen atoms and the difficulty to form CnHx+ (0 ≤ x ≤ 4) by multisteps of single hydrogen elimination are discussed. The latter observation may be attributed to characteristically different structures of hydrogenated carbon cluster ions CnHx+ with x ≥ 5 and x ≤ 4." @default.
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- W2017705407 date "1999-04-01" @default.
- W2017705407 modified "2023-10-01" @default.
- W2017705407 title "Hydrogen atom elimination from polycyclic aromatic hydrocarbons with sustained off-resonance irradiation: a new approach to produce carbon/hydrogen cluster cations CnHx+" @default.
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- W2017705407 doi "https://doi.org/10.1016/s1387-3806(98)14017-4" @default.
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