Reversible addition-fragmentation chain-transfer polymerization: Unambiguous end-group assignment via electrospray ionization mass spectrometry
Vana, Philipp, Albertin, Luca, Barner, Leonie, Davis, Thomas P., & Barner-Kowollik, Christopher (2002) Reversible addition-fragmentation chain-transfer polymerization: Unambiguous end-group assignment via electrospray ionization mass spectrometry. Journal of Polymer Science Part A: Polymer Chemistry, 40(22), pp. 4032-4037.
Electrospray ionization mass spectrometry was performed to identify the structure of polymeric methyl acrylates generated via the cumyl dithiobenzoate (CDB), cumyl p-fluorodithiobenzoate (CPFDB), and 1-phenylethyl dithiobenzoate (PEDB) mediated reversible addition-fragmentation chain-transfer (RAFT) polymerizations. The relatively simple spectra clearly demonstrate the end groups of this living free-radical polymerization technique. Only polymeric chains carrying one leaving group of the RAFT agent and the dithiobenzoate end group as the active RAFT center were discovered. Multiple-stage mass spectrometric experiments and oxidation of the dithioester end group confirmed the structure of the generated polymers.
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