Chart 1.
Structural formulas of (A) N-methyl-4,4′-bipyridinium, MQ+, (B) N,N′-dimethyl-4,4′-bipyridinium, MV2+, and (C) phenols used in this study tyrosine, p-methylphenol, and 4-methoxyphenol, MeOPhOH.
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