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Preferential precipitation of C70 over C60 with p-halohomooxacalix[3]arenes

Organic & Biomolecular Chemistry Pub Date: 2002-11-27 DOI: 10.1039/B208107E

Abstract

Preferential precipitation of C₇₀ from a toluene solution of C₆₀ and C₇₀ was accomplished with p-trihalohomooxacalix[3]arenes (1₃·X·X·X) prepared by the reductive coupling of diformylphenols. Heavy halogens, Br and/or I, are essential at the para position of 1₃·X·X·X for obtaining good yields and selectivities. C₇₀ with up to 92% purity was obtained after the preferential precipitation.

Graphical abstract: Preferential precipitation of C70 over C60 with p-halohomooxacalix[3]arenes

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Organic & Biomolecular Chemistry

Journal Name：Organic & Biomolecular Chemistry

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