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Creators/Authors contains: "King, Jared"

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  1. ; (, The Journal of Physical Chemistry A)
    Crystals of 4,4’-dimethylbenzophenone (DMBP) are known to react by intermolecular H-atom transfer followed by radical pair recombination. To determine the contribution of the H-atom transfer reaction for the deactivation of the triplet ketone, transient absorption spectra and kinetics were obtained using aqueous nanocrystalline suspensions. Single exponential lifetimes of ca. 1185 ns with no deuterium isotope effect and inefficient product formation suggests that the reaction does not contribute significantly to the kinetics of triplet decay. By contrast, the observed lifetime is consistent with previous observations with p, p’-disubstituted benzophenones that undergo efficient self-quenching process by a reductive charge transfer mechanism. 
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