Time-resolved CIDNP as a probe of 2,2′-dipyridyl radical anion complexation with β-cyclodextrin

TR CIDNP was used to demonstrate the influence of host-guest complexation on the dynamic behavior of 2,2′-dipyridyl radical anion. It was found that the radical anion is kept in the β-cyclodextrin cavity for the time sufficient for the relaxation of nuclear polarization.