Energy transfer in oligothiophene inclusion compounds

Energy transfer between terthiophene and quinquethiophene oligomers embedde d in the nanochannels of perhydrotriphenylene crystals is investigated by f s-time-resolved photoluminescence spectroscopy. Excitonic effects in these compounds are suppressed due to the large intermolecular distances imposed by the host crystal. Very efficient transfers of the electronic excitations from donor (terthiophene) to acceptor (quinquethiophene) molecules are obs erved. A quantitative analysis of the experimental data show that energy mi gration mainly occurs via direct donor-acceptor single-step transfer.