“…For such transitions the critical transfer radii values range between 10 and 100 Å . This range of values depends on the intensities of the relevant electronic transitions of D and A as well as on their spectral overlap, as expressed by the spectral overlap integral for dipole−dipole interaction
Förster theory and its many extensions (see below) are ideally suited for quantitative interpretation and prediction of experimental observations of inter-EET in systems ranging from dye solutions and ETDL systems, − ,− polymers, − ,− molecules adsorbed on surfaces, − transfer between monolayers and monolayer assemblies, − in Langmuir−Blodget films, − in micellar solutions − to restricted geometries, fractals, and disordered systems. − For describing EET involving forbidden transitions one should consider exchange interaction contributions, as discussed in the next section.…”