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Supramolecular Chromatographic Separation of C<sub>60</sub> and C<sub>70</sub> Fullerenes: Flash Column Chromatography vs. High Pressure Liquid Chromatography
oleh: Subbareddy Mekapothula, A. D. Dinga Wonanke, Matthew A. Addicoat, David J. Boocock, John D. Wallis, Gareth W. V. Cave
| Format: | Article |
|---|---|
| Diterbitkan: | MDPI AG 2021-05-01 |
Deskripsi
A silica-bound <i>C</i>-butylpyrogallol[4]arene chromatographic stationary phase was prepared and characterised by thermogravimetric analysis, scanning electron microscopy, NMR and mass spectrometry. The chromatographic performance was investigated by using C<sub>60</sub> and C<sub>70</sub> fullerenes in reverse phase mode via flash column and high-pressure liquid chromatography (HPLC). The resulting new stationary phase was observed to demonstrate size-selective molecular recognition as postulated from our in-silico studies. The silica-bound <i>C</i>-butylpyrogallol[4]arene flash and HPLC stationary phases were able to separate a C<sub>60</sub>- and C<sub>70</sub>-fullerene mixture more effectively than an RP-C<sub>18</sub> stationary phase. The presence of toluene in the mobile phase plays a significant role in achieving symmetrical peaks in flash column chromatography.