Block lengths and block sequence of linear triblock and glycerol derivative diblock copolyethers by electrospray ionization--collision-induced dissociation mass spectrometry

Analytical Chemistry
Peran TerrierJeanine Tortajada

Abstract

Chemical properties of ethylene oxide (EO) and propylene oxide (PO) block copolymers are strongly dependent on their sequence. Useful information about copolymer sequence can be obtained by tandem mass spectrometry (MS/MS). In this work, collision-induced dissociation (CID) of ammonium adducts of various linear triblock and glycerol derivative diblock copolyethers produced by electrospray ionization was studied under low-energy conditions. At first, homopolymers MS/MS spectra enabled us to identify the nature of the product ions and to suggest decomposition pathways. Then, it was shown that copolyethers with the same composition in each repeat unit but with inversed block sequences (i.e., PEO-b-PPO-b-PEO vs PPO-b-PEO-b-PPO and gPEO-b-PPO vs gPPO-b-PEO) can be easily distinguished with characteristic fragment ions. In the case of linear copolymers, CID spectra gave pertinent information about block lengths.

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Citations

Aug 14, 2009·Journal of Mass Spectrometry : JMS·Anna C CreceliusUlrich S Schubert
Aug 18, 2012·Journal of Mass Spectrometry : JMS·Manel FriiaWilliam Buchmann
Jan 20, 2011·Mass Spectrometry Reviews·P TerrierW Buchmann
Sep 3, 2014·Analytical Chemistry·Aleer M YolChrys Wesdemiotis
Dec 1, 2006·Journal of Mass Spectrometry : JMS
Jan 27, 2009·Analytical and Bioanalytical Chemistry·Muhammad Imran MalikBernd Trathnigg
Dec 4, 2016·Journal of the American Society for Mass Spectrometry·Laurence CharlesJean-François Lutz
Sep 6, 2011·Journal of Chromatography. a·Andreas NasioudisOscar F van den Brink

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