Ozonation reactions of monomer and dimer lignin models: Influence of a catalytic amount of a manganese cyclam derivative on the ozonation reaction

This work focuses on the study of the reactivity of ozone with lignin model s such as vanillin and dehydro-di-isoeugenol (DHDIE) in methanol solution. The primary by-products formed are characterized by Gas Chromatography - Ma ss Spectrometry (GC-MS) and possible mechanisms for the formation of these by-products are suggested. In the presence of a catalytic amount of a manga nese tetraazamacrocyclic complex, other degradation derivatives are identif ied during DHDIE ozonation, proving that the complex induces a different re activity of ozone towards the model.