Ionization energy fullerenes

Keywords electron propagator quasiparticle approximations renormalized approximations quasiparticle virtual orbitals C60 fullerene ionization energies correlation states nucleotide electron detachment energies... 

Calculated and experimentally determined values of EAs and ionization energies (IE) of selected members of the fullerene family are shown in Table 1. The magnitude of these values clearly indicates that fullerenes easily accept electrons... 

Tab. 1 Calculated and experimental electron affinities (EAc and EAi) and ionization energies (lEc and lEi) of selected fullerenes...

Photoconductivity measurements on solutions of fullerenes in alkanes gave a greater reduction of the ionization energy than expected from the van der Waals diameter of the molecule (Katoh et al., 1994). 

Seifert, G., Vietze, K., Schmidt, R. (1996). Ionization energies of fullerenes - size and charge dependence. Journal of Physics B, 29, 5183. 

Table 6 Experimental and Calculated Ionization Energies (eV) of Ceo and 70 fullerenes...

Fullerene C60 gives by electron ionization the spectrum at the top. The ra/fe 720 to 723 ions result from the 13C isotopes. If these fullerene ions are allowed to collide at high energy with 4He, the spectrum at the bottom is observed. It results from endohedral addition of He in the fullerene. The endohedral nature has been demonstrated by neutralization-reionization of the m/z 724 ion. With data from Weiske Th., Wong Th., Kratschmer W., Terlouw J.K. and Scwarz H., Angew. Chem. Int. Ed. Engl., 31,183-185, 1992. 

We also note that the count rate varies considerably as the heating is varied. This can be understood by the dependence of the final ionization efficiency on the internal energy of the fullerenes. It proves that much internal energy remains in the molecules during their flight through the apparatus. 

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