Abstract
Abstract Argon ion laser excitation of covalently linked porphyrin–tryptophan compound in the presence of 1,4-benzoquinone in benzene-d6 resulted in strong 1H-NMR polarizations of tryptophan moiety. These CIDNP effects are reasonably explained by the mechanism involving the secondary electron transfer from tryptophan moiety to porphyrin cation radical as the key step.
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