Electric dipole moment and charge transfer in alkali-C60 molecules
Laboratoire de Spectrométrie Ionique et Moléculaire, Université Lyon I et CNRS, 43 boulevard du 11
69622 Villeurbanne Cedex, France
Revised: 26 April 2000
Published online: 15 October 2000
We have measured the electric dipole moment of isolated alkali-C60 molecules (with alkali = Li, Na, K, Rb, and Cs) by molecular beam deflection experiments. The dipole increases from 12.4 D for LiC60 to 21.5 D for CsC60. These results are compared to those deduced from an analytical polarizable-ion model. This comparison shows that there is a strong electron transfer from the alkali atom to the C60 cage, which is almost complete for KC60 and RbC60.
PACS: 33.15.Kr – Electric and magnetic moments (and derivatives), polarizability, and magnetic susceptibility / 34.70.+e – Charge transfer / 61.48.+c – Fullerenes and fullerene-related materials
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2000