Collisions of C and C at fluorinated and non‐fluorinated self‐assembled monolayer films

We report here the spectra that result when singly and doubly charged buckminsterfullerene ions, C · and C , collide with self‐assembled monolayer films at collison energies ranging from 125 to 320 eV. The surfaces were prepared by the spontaneous assembly of octadecanethiol (CH 3 (CH 2 ) 17 SH), perdeuteroeicosanethiol (CD 3 (CD 2 ) 19 SH), and 2‐(perfluorooctyl)‐ethanethiol (CF 3 (CF 2 ) 7 CH 17 CH 2 SH) on vapor‐deposited gold. The fluorinated surface causes the greatest conversion of kinetic energy into internal energy, more extensive fragmentation of doubly charged buckminsterfullerene C is detected in collisions with this surface than in collisions with the alkanethiolate surfaces.