An Angle Resolved Ups Study Of Benzene Adsorption On Pt(111)

The results of an ARUPS study of benzene adsorption on Pt(111) at 300 K are presented. It is concluded that benzene is adsorbed on this surface with the ring parallel to the surface, and that the local symmetry of the adsorbed benzene is best described as CЗυ(σd). The n MO's of benzene are stabilized by ∼1.7 eV with respect to the σ M.O.S. on ehemisorption. These results are compared briefly with NEXAFS, HREELS and FT-i.r. data for benzene on this and other surfaces. The strength of the metal-benzene interaction on this surface appears to be greater than on Ni(1 11), Pd(1 1 1) or Rh(111) but less than on Ir(1 11), Os(0001) or Re(0001).