Knowledge Bank

Low temperature $(20K)$, high resolution $(0.5cm-1)$ electronic spectra of some mixed and neat molecular crystals-involving naphthalene, durene and hexamethylbenzene - will be discussed with the emphasis being placed on energy transfer processes which have been observed in these systems, including both inter- and intramolecular intersystem crossing and internal conversion. The nature and importance of guest-host and host-host interactions and their role in energy transfer will also be discussed.