“…All triplet decays were relatively complex but could be fit reasonably to a double exponential, with rates k 1 and k 2 and preexponential factors I 1 and I 2 . Although solvation effects, slightly different conformations, and mixing of nearby π,π* states may contribute to the observed nonexponentiality, , the greatest deviations were observed at the lowest temperatures. Given the complexity of the experimental data, to carry out a qualitative but insightful analysis of deuteurium transfer using eq 1, the average decay rates of 1a − c and 2a − c were calculated according to eq 2, with the contribution of each component obtained from the ratios I 1 / k 1 and I 2 / k 2 2d…”