Inverted Region in Intermolecular Electronic Energy Transfer

A critique of some recent publications (concerning the so-called inverted region in exchange-induced electronic energy transfer) is presented. It is first pointed out that the phenomena reported therein have in fact been known for nearly two decades; next, a derivation of the expression (used in the aforementioned communications) for k EnT, the transfer rate constant, is presented; finally, it is stressed that this formula cannot provide reliable quantitative predictions.