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NMR spectroscopy confirmed the existence of a C-Br bond at the terminal chain end of low molecular weight poly(methyl methacrylate) (PMMA) produced by atom transfer radical polymerisation (ATRP). Polymer was prepared using the heterogeneous Cu(I)Br/2,2'-bipyridine (bpy) catalyst with ethyl-2-bromoisobutyrate used as the initiator. This structural feature was not evident in the matrix-assisted laser...
The effect of the variation of the cation, on the matrix-assisted laser desorption/ionisation collision induced dissociation (MALDI-CID) spectra obtained, has been studied in a hybrid sector-orthogonal acceleration-time of flight tandem mass spectrometer for some synthetic oligomeric systems. Oligomers of poly(methyl methacrylate) and poly(styrene) in the molecular weight range of approximately 1000-3000...
The product ion mass spectra of protonated and cationated peptides of relative molecular mass (RMM) 555-574 Da have been obtained by surface-induced dissociation of MH + and [M + Cat] + ions in a four-sector tandem mass spectrometer equipped with a specially designed collision cell. A linked scan of the electric and magnetic sector field strengths of the second mass spectrometer was...
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