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• W2013589871 abstract "The HPLC separation of C60, C70, and higher fullerenes on a tetraphenylporphyrin-silica stationary phase is investigated using pure carbon disulfide, chlorobenzene, p-xylene, and toluene as mobile phases. Selectivity factors (α) for C70/C60 separations using these solvents are determined to be 1.8, 3.2, 3.8, and 4.3, respectively. Thermodynamic studies reveal that an exothermic interaction takes place between the fullerene and porphyrin stationary phase in the presence of such solvents. Higher fullerenes (up to C94) can be separated quickly at 90°C using CS2-toluene (45:55, v/v) as the mobile phase. The high solubility of fullerenes in these solvents dramatically increases the overal potential with regard to preparative fullerene purification. The inability of an alternative protoporphyrin-silica phase to separate C60/C70 using the same mobile phases supports a retention mechanism based on simultaneous face-to-face and face-to-edge π-π interactions between the immobilized tetraphenylporphyrin and the fullerenes." @default.
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• W2013589871 date "1995-10-01" @default.
• W2013589871 modified "2023-10-16" @default.
• W2013589871 title "High-performance liquid chromatography of C60, C70, and higher fullerenes on tetraphenylporphyrin-silica stationary phases using strong mobile phase solvents" @default.
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• W2013589871 doi "https://doi.org/10.1016/0021-9673(95)00560-a" @default.
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