Electroactive endohedral metallofullerene film electrodes in aqueous solutions

Studies on Metallofullerene (Dy@C82) Embedded in a DDAB Film in Aqueous Solution

“…Four reversible redox couples ( E 1/2 1= 0.471 V, E 1/2 2 = 0.234 V, E 1/2 3= −0.405 V, and E 1/2 4 = −1.08V) were observed. Obviously, the well-defined redox responses of the Dy@C 82 /DDAB film are similar to that of Dy@C 82 dissolved in an organic homogeneous solvent (see Figure b) but are a sharp contrast to that of its own film in acetonitrile 21 or in aqueous media . Experimental results showed that the peak currents for all four peaks were proportional to the square root of the scan rate in the range of 10−200 mV/s, which indicates that the electrochemical reaction of the Dy@C 82 /DDAB film is a diffusion-controlled process.…”

“…In view of the unique electrochemical properties of metallofullerenes in practical applications and their heterogeneous electron-transfer characteristics, we have engaged in the preparation of metallofullerene films by a variety of techniques. Some properties of these films have been measured regarding their photoelectrochemistry and electrochemistry. − We have reported the first study on the electron transfer of the Dy@C 82 (I) film on electrode surfaces in an organic media such as acetonitrile . The electrochemistry of the metallofullerene film was found to be quite different from that of dissolved Dy@C 82 (I).…”

“…However, a pair of reversible oxidation and rereduction waves was observed, which was not seen in empty fullerene films. On the other hand, considering the promising application potentials of metallofullerenes in the biological area, we have prepared Dy@C 82 films on a GC electrode by direct solution cast and studied their electrochemical response . We have also encapsulated Dy@C 82 in membrane films formed with a cationic surfactant didodecyldimethylammonium bromide (DDAB).…”

Improved Electrochemistry of Biomolecules Using Nanomaterials

“…The as-prepared biocompatible matrices can be used for biomacromolecule interrogation. Oyama and co-workers demonstrated that when biocompatible gold nanoparticles and ITO were combined for Mb immobilization, stable and well-behaved voltammetry for Mb could be obtained [113,114]. Three-dimensional superstructures, multilayer arrays consisting of GNPs cross-linked by MP-11, were assembled on transparent ITO-conductive glass supports [115].…”

Electrochemistry of Sc3N@C78 and Sc3N@C80 (Ih): On achieving reversible redox waves of the trimetal nitride endohedral fullerenes

“…Electrochemical characterization of endohedral fullerenes provides direct insight into their electronic structures [10][11][12][13]. Electrochemical studies of Sc 3 N@C 80 have been reported by several groups, but the only solvent used was o-dichlorobenzene (o-DCB) due to the adequate solubility of the metallofullerene in this solvent.…”