Ce. Bolton et al., MODELING OF GEMINATE ANNIHILATION IN QUASI-ONE-DIMENSIONAL SOLIDS, Journal of the Chemical Society. Faraday transactions, 92(18), 1996, pp. 3391-3400
Citations number
44
Categorie Soggetti
Chemistry Physical","Physics, Atomic, Molecular & Chemical
Exciton migration processes in the liquid-crystal mesophase of phthalo
cyanines and porphyrins exhibit extreme anisotropy, so a diffusion-bas
ed analysis of the kinetics of annihilation may not be suitable, even
if the appropriate three-dimensional diffusion tensor is used. A simul
ation technique incorporating the crystal structure of a quasi-one-dim
ensional phthalocyanine-like medium is developed and its predictions a
re contrasted with those of the conventional diffusion-based treatment
s. The kinetics obtained using the simulation model are very different
from those given by conventional methods. For instance, the annihilat
ion probability of a pair initially on the same stack is considerably
larger. Approximate master-equation models for the annihilation kineti
cs in highly anisotropic media are also described.