New M3N@C-2n endohedral metallofullerene families (M = Nd, Pr, Ce; n=40-53): Expanding the preferential templating of the C-88 cage and approaching the C-96 cage

作者：Chaur Manuel N; Melin Frederic; Elliott Bevan; Kumbhar Amar; Athans Andreas J; Echegoyen Luis^*

来源：Chemistry - A European Journal, 2008, 14(15): 4594-4599.

DOI：10.1002/chem.200800044

• electrochemistry
• HOMO-LUMO gap
• HPLC
• mass
• spectrometry
• metallofullerenes
• template synthesis

Three new families of trimetallic nitride template endohedral metallofullerenes (TNT EMFs), based on cerium, praseodymium, and neodymium clusters, were synthesized by vaporizing packed graphite rods in a conventional Kratschmer-Huffman arc reactor. Each of these families of metallofullerenes was identified and characterized by mass spectroscopy, HPLC, UV/Vis-NIR spectroscopy, and cyclic voltammetry. The mass spectra and HPLC chromatograms show that these larger metallic clusters are preferentially encapsulated by a C-88 cage. When the size of the cluster is increased, the C-96 cage is progressively favored over the predominant C-88 cage. It is also observed that the smaller cages (C-80-C-86) almost disappear on going from neodymium to cerium endohedral metallofullerenes. The UV/Vis-NIR spectra and cyclic voltammograms confirm the low HOMO-LUMO gap and reversible electrochemistry of these M3N@C-88 metallofullerenes.

• 出版日期2008