We have sketched the broad outlines of a new theory of elementary electron
transfer in condensed matter in the light of which the nature of the well-k
nown narrow optical J-band is due to an unusual resonance between the elect
ron and environmental nuclear reorganization motion, not to averaging an en
vironmental statistical disorder by the quickly moving Frenkel exciton as i
s generally believed. (C) 2001 Published by Elsevier Science B.V.