DETERMINATION OF THE DISTANCE FOR TRIPLET ENERGY-TRANSFER IN THE FAUJASITE NAY

Triplet energy transfer from xanthone to 1-methylnaphthalene in the fa ujasite NaY involves a rapid component which occurs in < 100 ns. This process has been examined with laser techniques, The yields of detecta ble triplet xanthone and 1-methylnaphthalene are interpreted in terms of a statistical model that assumes that the sphere for energy transfe r includes the original excitation supercage and its four nearest neig hbor supercages; i.e. the donor and acceptor are not required to be in the same supercage. For 1-methylnaphthalene, extensive self-quenching (occurring in the same distance regime as energy transfer) controls t he yields of detectable triplets.