Abstract
It is shown how chemically induced dynamic nuclear polarisation (CIDNP) spectroscopy is able to efficiently complement electron paramagnetic resonance (EPR), when molecular transformations of free radical pairs are investigated. This is demonstrated in three examples of modelling biologically relevant phenomena, particularly oxidative stress and antioxidant activity. Lipid peroxidation, topological control in the oxidation of cholesterol, and a mechanistic study of antioxidant activity of natural tea and wine polyphenols are presented.
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