Photoelectron spectroscopy and theoretical studies of [Co-m(pyrene)(n)](-) (m=1,2 and n=1,2) complexes

摘要

Anion photoelectron spectroscopic experiments and density functional theory based calculations have been used to investigate the structural, electronic, and magnetic properties of neutral and anionic [Co-m(pyrene)(n)] (m,n=1-2) complexes. The calculated electron affinities and vertical transition energies of Co-m(pyrene)(n) are in good agreement with the measured values. Our results provide clear evidence for dimerization of Co atoms and formation of sandwich structures in these complexes. While the calculated spin magnetic moments of neutral Co-2(pyrene)(n) complexes suggest a preference for ferromagnetic coupling between Co atoms, the spin magnetic moment of Co atom in Co(pyrene) and Co(pyrene)(2) complexes was reduced to 1 mu(B). (C) 2008 American Institute of Physics.