PS - CID Results

    Collision induced dissociation (CID) spectra of poly(styrene) (PS) oligomers cationized by Cu+ and Ag+ have been published [A.T. Jackson, H.T. Yates, J.H. Scrivens, M.R. Green, R.H. Bateman, J. Am. Soc. Mass Spectrom. 1998, 9, 269; A.T. Jackson, A. Bunn, L.R. Hutchings, F.T. Kiff, R.W. Richards, J. Williams, M.R. Green, R.H. Bateman, Polymer 2000, 41, 7437]. The spectra mainly consist of two series of fragment peaks in the low m/z range (100-400) that have the metal cation still attached. These peaks appear to be a result of the cleavage of the PS backbone as shown below


    To help interpret the CID spectra, ion mobility experiments and molecular modeling calculations were used to investigate the gas-phase conformations of PS oligomers cationized by Ag+, Cu+, Li+, and Na+. (Ag+ and Cu+ are not parameterized in the molecular mechanics calculations so Li+ and Na+ were used in the modeling.)