Hannover 2010 – scientific programme
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MO: Fachverband Molekülphysik
MO 27: Poster: Cluster
MO 27.10: Poster
Thursday, March 11, 2010, 16:00–18:30, Lichthof
Sublimation of the endohedral fullerene Er3N@C80 — Alexander Stibor, •Hannah Schefzyk, and József Fortágh — Center for Collective Quantum Phenomena and their Applications, Universität Tübingen
Evaporation studies of the endohedral metallofullerene Er3N@C80 were performed via Knudsen effusion mass spectrometry. The macromolecule consists of a C80 fullerene cage which is stabilized by comprising a complex of three erbium atoms bounded to a nitrogen atom and has a mass of 1475 amu. The mass spectrum at a temperature of 1045 K and the relative intensities of the thermal fractions of Er3N@C80 are provided, proving its high stability. By measuring the quantity of evaporated molecules in thermal equilibrium through a quadrupole mass spectrometer in a temperature range between 782 K and 1128 K, the heat of sublimation was obtained from the second law method to be Hsub = 237 ± 7 kJ/mol.