339245-78-2Relevant academic research and scientific papers
Preferential precipitation of C70 over C60 with p-halohomooxacalix[3]arenes
Komatsu, Naoki
, p. 204 - 209 (2003)
Preferential precipitation of C70 from a toluene solution of C60 and C70 was accomplished with p-trihalohomooxacalix[3]arenes (I3·X·X·X) prepared by the reductive coupling of diformylphenols. Heavy halogens, Br and/or I, are essential at the para position of I3·X·X·X for obtaining good yields and selectivities. C70 with up to 92% purity was obtained after the preferential precipitation.
