S. Sun et al., OBSERVATION OF A NEAR-IR ABSORPTION-BAND OF THE FLUORENE EXCIMER BY PHOTODISSOCIATION SPECTROSCOPY, Journal of physical chemistry, 97(45), 1993, pp. 11635-11638
Photodissociation behaviors of the fluorene excimer, produced from the
electronic excitation of the corresponding van der Waals dimer, have
been investigated by photodepletion and photofragmentation techniques.
The excimer exhibits a strong absorption band in the near-IR region,
with an intensity maximum at about 850 nm. This excimer absorption is
assigned to an intervalence transition between the lowest excimer stat
e and an upper state of repulsive character, both arising from the exc
iton resonance interaction of the monomer S1 state. Excitation of this
band leads to a rapid dissociation of the excimer into monomer fragme
nts, one of which is electronically excited. The photodissociation dyn
amics of the fluorene excimer is compared with that of the naphthalene
excimers.