Electrochemistry of nitride clusterfullerenes
In situ ESR spectroelectrochemistry of nitride clusterfullerenes
Another intriguing research focus of our group is the electrochemistry of fullerenes. We have systematically studied a series of clusterfullerene M3N@C80 (I) (M=Sc, Dy, Tm) to address the effect of the encaged cluster on their electrochemical behavior. Based on the comparison of the cyclic voltammograms of several tridysprosium Dy3N@C2n (n = 39, 40), i.e., Dy3N@C80 (I), Dy3N@C80 (II), and Dy3N@C78 (II), we revealed the effect of the symmetry and size of the fullerene cage on the electrochemical behavior of Dy3N@C2n (n = 39, 40). The fascinating finding of this study is that the Dy3N@C80 (I) monoanion exhibits a charge-induced reversible rearrangement of the structure, which may result from the change either of the Dy3N cluster (shape or position inside the cage) or of the cage symmetry (see next figure).
| Electrochemistry of Dy3N@C80 (I) |
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| Dy3N@C80 (I) in TBABF4/o-DCB with Ferrocene (Fc) as internal standard. Inset: double-square reaction scheme. |
In addition, in a recent finding we successfully probed the radical cation of Sc3N@C68 by in situ ESR/UV-Vis-NIR spectroelectrochemistry method, as shown in the next figure.
| ESR spectrum of the stable radical cation of the non-IPR Sc3N@C68 (D3:6140). |
Contact
Prof. Lothar Dunsch
| Address: | IFW Dresden |
| Helmholtzstraße 20 01069 Dresden |
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| Germany | |
| Phone: | +49 351 4659 660 |
| Fax: | +49 351 4659 811 |
| Email: | L.Dunsch@ifw-dresden.de |