Abstract
The separation of C 60 and C 70 fullerenes on four different polysiloxane stationary phases was examined. It was determined that polar solvents can be used as mobile phases effectively for the separation of fullerene molecules. Unlike previously published work, a polymeric octadecyl siloxane (ODS) stationary phase provided higher separation factors for C 70/C 60 than did monomeric ODS stationary phases or phenyl substituted stationary phases. For example, for a methanoldiethyl ether (50:50, v/v) mobile phase and C 60, k′ ≈ 5.0 separation factors, α = 3.3, were achieved with polymeric ODS compared to α = 2.2, with a monomeric ODS stationary phase. A linear solvation energy relationship (LSER) was used to model the importance of solvent interactions and stationary phase interaction to solute retention.
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