Intramolecular triplet-triplet energy transfer in oxa- and aza-di-pi-methane photosensitized systems.
Two different mechanisms are proposed for the intramolecular triplet-triplet energy transfer in oxa- and aza-di-pi-methane systems, one thermally induced and the other photoinduced. These mechanisms involve a key structure that corresponds to an avoided crossing. The triplet sensitized photochemistry of these compounds, focusing attention in the di-pi-methane rearrangement, is discussed in light of these proposed mechanisms.
Frutos
Luis M
LM
Sancho
Unai
U
Castaño
Obis
O