Ion-molecule equilibria in vapors of higher fullerenes
- Moscow State Univ (Russian Federation)
One of the most important and interesting properties of fullerenes is their ability to accommodate electrons, thus forming stable singly and doubly charged anions in the gas phase. Highly charged anions up to C{sub 60}{sup 6{minus}} were detected in solutions containing a fullerene in the presence of alkali metals. Many chemical properties of fullerenes appeared explicable on the basis of electron affinity of buckminsterfullerene C{sub 60} being 2.65 {+-} 0.05 eV. This value of electron affinity indicates that the corresponding C{sub 60}{sup {minus}} anion should be highly stable. It is reasonable to assume that other fullerenes with a number of carbon atoms exceeding 60 are also able to form stable anions. The existence of such anions was established using methods of laser vaporization of fullerenes, chemical ionization, and electrospray, as well as when studying the products of fullerene entrapment of slow electrons. The most intense peaks arose from C{sub 60}{sup {minus}}, C{sub 70}{sup {minus}}, C{sub 76}{sup {minus}}, C{sub 78}{sup {minus}} and C{sub 84}{sup {minus}}, which corresponded qualitatively to the composition of the solid samples under consideration. The authors studied equilibrium constants for the charge exchange between fullerenes.
- OSTI ID:
- 88730
- Journal Information:
- Doklady Physical Chemistry, Journal Name: Doklady Physical Chemistry Journal Issue: 1-6 Vol. 339; ISSN 0012-5016; ISSN DKPCAG
- Country of Publication:
- United States
- Language:
- English
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