EPR, FTIR, and FAB mass spectrometric investigation of reaction of H atoms with C 60 in a cyclohexane matrix

Abstract

Hydrogen atoms have been reacted with C 60 in a cyclohexane matrix at 77 K in a rotating cryostat. Species HC 60, H 2 n + 1 C 60, and H 2 n C 60 have been identified by EPR, FTIR and FAB mass spectrometry. HC 60 has the magnetic parameters a H(1) = 92.9 ± 0.5 MHz and g = 2.00218 ± 0.00004. These values are compared to the deuterium and muonium analogs. Reasons for the isotope effect in the hydrogen and muon hyperfine interactions of HC 60 and MuC 60 are discussed. The narrow line widths of the EPR transitions of H 2 n + 1C 60 may be associated with globe-trotting hydrogen atoms. C 60 acts as a H atom sponge at high atom fluxes and H 2 n C 60s with n as large as 17 have been identified.