ELECTRONIC-ENERGY TRANSFER IN SUPRAMOLECULAR SPECIES - SELF-POISONINGAND SELF-EDUCATING SYSTEMS

We examine the possibility to design supramolecular systems where the photoinduced energy flow can be either interrupted or initiated by a s elf-photosensitized reaction. Systems of the first type are called ''s elf-poisoning'', whereas those of the second type are called ''self-ed ucating''. An example of a ''self-poisoning'' system, are made of Ru(b py)(3)(2+)- and Os(bpy)(3)(2+)-type units (bpy is 2,2'-bipyridine) Lin ked to the 9,10-positions of an anthracene ring is discussed.