Does isotopic substitution affect the reduction potential of aromatic molecules?

Reduction potentials for anthracene, pyrene, perylene, and nitrobenzene, their perdeuterated forms, and ¹⁵N-enriched nitrobenzene were measured by using voltammetric techniques. The results indicated that the perdeuterated forms have lower solution electron affinities than the isotopically unmodified counterparts since the former exhibit slightly more negative reduction potentials. However, ¹⁵N enrichment was not observed to cause any significant effects under our experimental conditions.