Fig. 5: IM studies on fullerenes and polyoxometallates.

a (i) Mass spectra obtained by laser-induced ionization of C₆₀H₂₁F₉⁻ and (ii) comparison of arrival times of C₆₀H_21−xF_9−x⁻ (x = 0 −9) (HF loss, denoted by circles), C₆₀H_{21−x −2y}F_{9 –x}⁻ (y = 0−5) (additional H₂ loss, denoted by squares) and C₆₀ (denoted by triangle)⁷⁶. (Copyright^© 2016 American Chemical Society) b (i) Structures of polyoxometallate (POM) calibrants, Anderson (R = tris(alkoxo) ligand (3) or aliphatic ligand (4), {MnMo₆O₂₄}), Keggin (1, {PW₁₂O₄₀}), and Dawson (2, {P₂W₁₈O₆₂}) clusters. (ii) ATDs obtained by using the POM clusters (1 = green, 2 = red, 3 = orange, and 4 = blue) as calibrants⁷⁷. (Copyright^© 2016 American Chemical Society)