Charge-transfer reactions of C3+.60: “bracketing” the third ionization energy of C60

✍ Scribed by G. Javahery; H. Wincel; S. Petrie; D.K. Bohme

• Publisher: Elsevier Science
• Year: 1993
• Tongue: English
• Weight: 532 KB
• Volume: 204
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(93)89188-n

✦ Synopsis

The occurrence or absence of charge transfer from C go" to several neutral molecules is reported. The results, which were obtained using the selected-ion flow tube technique operating at 294 t 2 K and a helium buffer gas pressure of 0.35 f 0.01 Torr, are in good agreement with earlier Fourier-transform ion cyclotron resonance experiments. Rapid charge transfer, often in competition with other product channels, was noted for the reactions of C go" with several neutrals having IE 6 11.02 eV. Charge transfer to OCS (IE = I 1.1736 eV) was observed to be inefftcient, and no charge transfer was seen to &II, (IE = 11.40 eV) or to neutrals having higher ionization energy. Consideration of the effects of Coulombic repulsion upon the occurrence of charge transfer from a triply-charged ion indicates IE(Cg)= 15.6kO.S eV, in disagreement with a value IE(~)=l7.0+0.75 eV determined by charge stripping. A value for the fourth ionization energy of Cdo, 19.5 eV, is estimated by extrapolation ofthe first three ionization energies.