Electronic energy transfer from pyrazine to a silver(111) surface between 10 and 400thinsp;Aring;

摘要

The phosphorescence lifetime of pyrazine molecules above a Ag(111) surface has been measured as a function of moleculendash;metal seperation between 10 and 400thinsp;Aring;. In contrast to the previous work on the pyrazine/Ag system, we find that the lifetime decreases monotonically as the pyrazine approaches the metal surface. The distance dependence of the phosphorescence lifetime is described quantitatively using the classical treatment of nonradiative energy transfer of Chance, Prock, and Silbey.