Abstract

Evaluation methods based on dispersive kinetics were applied to derive kinetic parameters for the rearrangement of differently α-substituted nitronic acids generated by flash photolysis (λ inc = 347 nm) of o-nitrobenzyl esters. The rearrangements were performed in polymer matrices of different chemical nature: poly(methyl acrylate) (PMA), poly(methyl methacrylate) (PMMA), poly(styrene) (PSt), and poly(dimethylsiloxane) (PDMS). A nonexponential decay behavior was observed in rigid and highly viscous matrices which can be characterized by the average rate constant v and the dispersion factor α

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