Recognition and separation of carbon clusters

Christopher J Welch (Inventor), William H Pirkle (Inventor)

Research output: Patent


Carbon clusters, such as C.sub.60 and C.sub.70 fullerenes are separated by means of a recognition selector having the formula: ##STR1## wherein R.sub.1 is ##STR2## wherein R.sub.2 is O, S or NR.sub.12 wherein R.sub.12 is independently hydrogen or P.dbd.O with the proviso that when R.sub.12 is P.dbd.O, then only one such group is present and all R.sub.2 's are additionally bonded to R.sub.12, PA1 R.sub.4 is independently O, S or NH, PA1 R.sub.3 and R.sub.5 are each independently hydrogen or lower alkyl, PA1 n and o are each independently zero, 1, 2 or 3, PA1 p, q, r, s and t are each independently zero or 1, PA1 Ar is a monocyclic or ortho-fused polycyclic aromatic moiety having up to 10 carbon atoms, either of which may be unsubstituted or substituted with one or more lower alkyl, NO.sub.2, N(R.sub.6).sub.3.sup.30, CN COOR.sub.7, SO.sub.3 H, COR.sub.8 and OR.sub.9 wherein R.sub.6, R.sub.7, R.sub.8 and R.sub.9 are each independently hydrogen or lower alkyl; PA1 W is H or CH.dbd.CH.sub.2 ; and PA1 m is 1 to 10.
Original languageEnglish (US)
U.S. patent number5487831
StatePublished - Jan 30 1996


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