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Negative-ion mass spectra for a 0.5 × 10−5 M solution of C60(OH)24 in ultrapure water: (a) full scan spectrum (b) m/z range 600–1500. (●[M(n) − nH2O − xH]x-, ▲[M(n) + nH2O(m) − xH]x−, ♦[M(n) − H2O(m) − yHO• + ye − xH](x+y)−, ○[M(n) − mH2O − yH• − xH]x−y•−, ∆[M(n) + H2O(m) − yH• − xH]x−y•−, ◊[M − mH2O − yHO• − zH• − xH]x−(y+z)•−).
