Esr Study of C60 N- Anion Radicals in DMSO Solution |
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| Authors: | Ilias I Khairullin Wen-Tsung Chang Lian-Pin Hwang |
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| Affiliation: | 1. Department of Chemistry, National Taiwan University , Institute of Atomic and Molecular Sciences , Academia Sinica, P.O. Box 23–34, Taipei, Taiwan, Republic of China;2. Department of Thermophysics , Uzbekistan Academy of Sciences , Katartal Str.28, Chilanzar C, Tashkent, 700135, Republic of Uzbekistan (CIS);3. Department of Chemistry, National Taiwan University , Institute of Atomic and Molecular Sciences , Academia Sinica, P.O. Box 23–34, Taipei, Taiwan, Republic of China |
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| Abstract: | Abstract With the aim to stabilize reduced C60 molecules of solid fulleride as free anion radicals in solution, NaxC60 (x=l, 10) was dissolved in DMSO. The NaxC60 was chosen among the other alkali-metal fullerides due to the possibility to increase a number of intercalated Na atoms in a fee. lattice of C60 A sufficiently high concentration of C60 anion radicals of an order of magnitude larger than that usually achieved in solution by an electrochemical reduction was obtained. The sharp resonances with the linewidths of order of 0.1 G and with g=2.0004(6) ?2.0012(8) of the room temperature ESR spectra of fluid solution were assigned from mono- to pentaanions of C60. An appearance of additional sharp peaks at g=2.0016–2.0019 in the spectra of solution of nominal Na10C60, but Na1C60, tentatively related to C60 n- with n>6. The results of this study showed a simple approach in an accomplishment of highly concentrated solutions of free anion radicals C60 n-, as well as in stabilization of the anion radicals with increased n. In this way a homogeneity of alkali metal intercalation and characteristics of the solvent will be important. |
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