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Abstract
A novel immobilization method for the preparation of tetraphenylporphyrin–silica stationary phases is investigated. Stationary phases consisting of immobilized hydroxyphenyl-triphenylporphyrin (HPTPP) on silica are shown to exhibit unmatched selectivity ( α= k C 70 ′/ k C 60 ′) and improved efficiency for the separation of fullerenes, with α=7 using 100% toluene as the mobile phase. The HPTPP species are immobilized via reaction with glycidoxypropyltrimethoxysilane. The high shape selectivity of columns packed with HPTPP–silicas enables the single step separation of higher molecular mass fullerenes and higher fullerene isomers using strong fullerene solvents as mobile phases.
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