Mechanistic Study of the Collision-Induced Dissociation of Sodium-Cationized Polylactide Oligomers: A Joint Experimental and Theoretical Investigation

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de Winter, J. | Lemaur, V. | Marsal, P. | Coulembier, O. | Cornil, J. | Dubois, P. | Gerbaux, P.

Edité par CCSD ; American Chemical Society -

The low-kinetic energy collision-induced dissociation (CID) behavior of different sodium-cationized polylactide (PLA) oligomers was thoroughly investigated to shed some light on the analytical potentialities of CID experiments in the context of polymer characterization. Indeed, investigation of several end-groups modified PLA reveals that, in addition to the expected end-group specific dissociations, collisionally-excited PLA.Na+ suffer from a backbone cleavage. The so-obtained sodium-bound dimer cations consecutively undergo the loss of a monomeric residue that corresponds to neutral acrylic acid. The experimental observations, performed on a hybrid Q-ToF instrument, were totally corroborated by a theoretical study involving DFT calculations, molecular mechanics, and molecular dynamics calculations

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