RESUMO
Direct methylation of [60]fullerene via a gas-phase reaction in a CH4/H2 atmosphere was performed using a modified hot filament chemical vapor deposition method. Pressures were varied from 10 to 60 mbar and the substrate was maintained at 690 degrees C. High-resolution matrix-assisted laser desorption ionization (MALDI) mass spectrometry analysis showed signals corresponding to C60H18-2n(H,CH3)n. Collision-induced dissociation experiments confirmed a maximum of 18 ligands possible to the [60]fullerene cage.
Assuntos
Fulerenos/química , Gases , Espectroscopia de Ressonância Magnética , Metilação , Espectrometria de Massas por Ionização e Dessorção a Laser Assistida por MatrizRESUMO
The particular chromophoric structure of C(70)Ph(10), which consists of two cage-centered π-electron systems, makes its photophysical properties an exception to those found for other phenylated [70]fullerenes C(70)Ph(2n) (n=2-4). For these other C(70)Ph(2n) species, their intrinsic photophysical properties undergo smooth transitions as a function of n.
