Abstract
The electron capture dissociation (ECD) of metallo-supramolecular dinuclear triple-stranded helicate Fe2L 4+3 ions was determined by Fourier transform ion cyclotron resonance mass spectrometry. Initial electron capture by the di-iron(II) triple helicate ions produces dinuclear double-stranded complexes analogous to those seen in solution with the monocationic metal centers CuI or AgI. The gas-phase fragmentation behavior [ECD, collision-induced dissociation (CID), and infrared multiphoton dissociation (IRMPD)] of the di-iron double-stranded complexes, (i.e., MS3 of the ECD product) was compared with the ECD, CID, and IRMPD of the CuI and AgI complexes generated from solution. The results suggest that iron-bound dimers may be of the form Fe I2 L 2+2 and that ECD by metallo-complexes allows access, in the gas phase, to oxidation states and coordination chemistry that cannot be accessed in solution.
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Published online November 6, 2009
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Kaczorowska, M.A., Hotze, A.C.G., Hannon, M.J. et al. Electron capture dissociation mass spectrometry of metallo-supramolecular complexes. J Am Soc Mass Spectrom 21, 300–309 (2010). https://doi.org/10.1016/j.jasms.2009.10.018
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DOI: https://doi.org/10.1016/j.jasms.2009.10.018