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Cyclic voltammetry modeling, geometries, and electronic properties for metallofullerene complexes with μ 3 ‐ η 2 : η 2 : η 2 ‐C 60 bonding mode
Author(s) -
Kim Kyoung Hoon,
Jung Jaehoon,
Park Bo Keun,
Han YoungKyu,
Park Joon T.
Publication year - 2007
Publication title -
journal of computational chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.907
H-Index - 188
eISSN - 1096-987X
pISSN - 0192-8651
DOI - 10.1002/jcc.20639
Subject(s) - chemistry , metallofullerene , cyclic voltammetry , delocalized electron , solvation , population , crystallography , metal , electron , electrochemistry , molecule , computational chemistry , physics , electrode , organic chemistry , demography , quantum mechanics , sociology
Abstract Reduction potential ( E red ) values have been calculated and compared with available cyclic voltammetry (CV) data for 10 metallofullerene complexes with the μ 3 ‐η 2 :η 2 :η 2 ‐C 60 (M 3 C 6 [C 60 ]) bonding mode. Consideration of bulk solvent effects is essential for the calculation of the E red values. Scaling factors for the electrostatic terms of the solvation energies have been introduced to fully describe the experimental cyclic voltammograms with a small mean deviation of 0.07 V. Multiple electron reductions induce movement of the metal cluster moieties on the C 60 surface, which is accompanied with the changes in some MC[C 60 ] bonds from π‐type to σ‐type mode. However, the changes in M 3 C 60 distances, as well as the geometric changes of M 3 and C 60 , are small for the reductions, which is in harmony with the high chemical and electrochemical stability of the metallofullerenes. Our population analyses reveal that the added electrons are not localized at the C 60 moieties, and electron population in the metal clusters is significant, more than 20% (av. 37%), for all the reductions. Furthermore, we demonstrated that the two close one‐electron redox waves in CV diagrams are strongly correlated with significant electron delocalization, about 40–80%, to the metal‐cluster moieties in these metallofullerene complexes. © 2007 Wiley Periodicals, Inc. J Comput Chem 2007