Iv. Rubtsov et K. Yoshihara, OSCILLATORY FLUORESCENCE DECAY OF AN ELECTRON DONOR-ACCEPTOR COMPLEX, The journal of physical chemistry. A, Molecules, spectroscopy, kinetics, environment, & general theory, 101(35), 1997, pp. 6138-6140
We report an oscillatory fluorescence decay of an electron donor-accep
tor complex of hexamethylbenzene and tetracyanoethylene in CCl4 at roo
m temperature, A fast spontaneous fluorescence decay with a characteri
stic time of 105 +/- 20 fs is observed, An underdamped oscillation of
fluorescence is overlapped with this fast decay. The period of the osc
illation is 209 +/- 4 fs, which corresponds to a frequency of 159 +/-
3 cm(-1) and is tentatively assigned to the intermolecular vibration i
n the excited state. The damping time of the oscillation is 280 +/- 30
fs.