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Electrochemical Survey: The Effect of the Cage Size and Structure on the Electronic Structures of a Series of Ytterbium Metallofullerenes
Author(s) -
Xu Jianxun,
Li Meixian,
Shi Zujin,
Gu Zhennan
Publication year - 2005
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.200500210
Subject(s) - metallofullerene , electrochemistry , electronic structure , fullerene , cyclic voltammetry , chemistry , differential pulse voltammetry , cage , ytterbium , computational chemistry , materials science , crystallography , doping , organic chemistry , mathematics , electrode , optoelectronics , combinatorics
The electrochemical properties of a series of metallofullerenes with different cages, namely, Yb@C 74 (II), Yb@C 76 (I, II), Yb@C 78 , Yb@C 80 , Yb@C 82 (I, II, III), and Yb@C 84 (II, III, IV), have been systematically investigated by cyclic and differential pulse voltammetry experiments for the first time. This article discusses the electronic structures of these metallofullerenes based on the results from these experiments. From previous electrochemical work and the above discussion, it is concluded that the nondegenerate LUMO is a common characteristic of the electronic structures of the higher fullerenes and monometallofullerenes. In addition, the effect of the cage on the electronic structure and properties of the metallofullerene is estimated from the plot of the reduction potential versus the carbon number of the metallofullerene. This estimation shows that usually the electronic structure and properties of the metallofullerene vary with cage size and structure. The cage structure is of particular importance for determining the electronic structure and properties. Moreover, an explanation concerning the abundance and stability of C 82 ‐based trivalent monometallofullerenes is given from an electronic structural standpoint.