TFS, the excitation range was 230–600 nm (5-
nm intervals) and the emission range 300–750
nm (5-nm intervals) with 5.0-nm slits and a
scan rate of 1200 nm/min. For SFS, a Perkin
Elmer Model LS50 fluorimeter was employed
with excitation from 250–650 nm, 15-nm
excitation and 10 nm emission slits and a scan
rate of 500 nm/min. An Edinburgh Instruments
Model LP900 laser flash photolysis
spectrometer operated in the fluorescence mode
was utilized for the TRFS measurements.
Samples were excited with 5-ns pulses of the
third harmonic (355 nm; power of 40 mJ/s) of a
pulsed Nd-YAG laser