Search for the form of fullerene C(60) in aqueous medium.
A transfer of fullerene C(60) to water was achieved by sonication of a two-phase system of water and C(60) in organic solvents, namely, benzene and toluene. Resulting aqueous dispersions were analyzed electrochemically, spectroscopically, by MALDI-MS and AFM methods. Samples prepared from benzene yield the formal redox potential very close to a value expected from the correlation of redox potentials and solvent donor numbers. However, these samples are not stable and C(60) precipitates out of the aqueous dispersion. Sonication of the toluene/water system produces stable system, in which the measured formal redox potential of C(60) is less negative. Stabilization of C(60) clusters in water is achieved by the presence of an organic amphiphile and spectroscopic methods indicate the presence of benzoate formed during sonication of a toluene/water mixture.
Pospíšil
Lubomír
L
J. Heyrovský Institute of Physical Chemistry, v.v.i., Academy of Sciences of the Czech Republic, Dolejškova 3, 18223 Prague, Czech Republic. lubomir.pospisil@jh-inst.cas.cz
Gál
Miroslav
M
Hromadová
Magdaléna
M
Bulíčková
Jana
J
Kolivoška
Viliam
V
Cvačka
Josef
J
Nováková
Kateřina
K
Kavan
Ladislav
L
Zukalová
Markéta
M
Dunsch
Lothar
L
D004563:Electrochemistry; D004566:Electrodes; D037741:Fullerenes / Q000737:chemistry*; D013058:Mass Spectrometry; D020527:Microscopy, Scanning Probe; D010084:Oxidation-Reduction; D012995:Solubility; D013057:Spectrum Analysis; D014867:Water / Q000737:chemistry*
D037741:Fullerenes; D014867:Water; C069837:fullerene C60