Abstract
Atmospheric pressure nonequilibrium plasma jet has been applied to the synthesis of [60]fullerene oxides (C60On) for the first time. C60O and C60O2 were produced and isolated in high yields up to 44% and 21%, respectively. The structural assignment of C60O was confirmed by comparison with the reported spectroscopic data. Theoretical calculations of 13C NMR chemical shifts for eight isomers of C60O2 were performed and compared with the experimental data to assign the most possible structure for the obtained C60O2 dominantly as an e isomer.
Highlights
Since the discovery of [60]fullerene (C60 ), various C60 derivatives have been synthesized due to their broad potential applications in materials science, biology and nanoscience [1,2,3,4,5,6,7]
The hollow steel needle with a tip radius of about 100 μm served as a high-voltage (HV) electrode, which was directly connected to a pulsed direct current (DC) power supply, and was used for carrying and guiding the working gas flow
Under the above atmospheric pressure nonequilibrium plasma jet (APNPJ) conditions, a solution of C60 (7.2 mg, 0.01 mmol) in ml of chlorobenzene was treated at 10°C for 10 min to give a claret-red solution along with brown precipitates, which did not dissolve in commonly used organic solvents [14,16]
Summary
Since the discovery of [60]fullerene (C60 ), various C60 derivatives have been synthesized due to their broad potential applications in materials science, biology and nanoscience [1,2,3,4,5,6,7]. Among these derivatives, the study of fullerene oxides (C60 On ) has been a popular area of research for decades. The cis-1 isomer of C60 O2 has been used as the precursor for bis-1,3-dioxolane derivatives of C60 [20] Despite these achievements, new approach to obtain C60 O and C60 O2 in higher yields is still highly demanding.
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