Self-contained Kondo effect in single molecules.
Kondo coupling of and conduction electrons is a common feature of f-electron intermetallics. Similar effects should occur in carbon ring systems (metallocenes). Evidence for Kondo coupling in Ce(C(8)H(8)(2) (cerocene) and the ytterbocene Cp*(2) Yb(bipy) is reported from magnetic susceptibility and L(III)-edge x-ray absorption spectroscopy. These well-defined systems provide a new way to study the Kondo effect on the nanoscale, should generate insight into the Anderson Lattice problem, and indicate the importance of this often-ignored contribution to bonding in organometallics.
Booth
C H
CH
Chemical Sciences Division, Lawrence Berkeley National Laboratory, California 94720, USA.
Walter
M D
MD
Daniel
M
M
Lukens
W W
WW
Andersen
R A
RA