Methods. Photochemical. Flash photolysis studies were carried out by using the 20-ns 530- nm light pulses from a Q-switched Nd laser flash photolysis setup. Transient absorption studies in the red, near-IR region employed a fast ITT photodiode as the photodetector. Steady-state emission properties (fluorescence and phosphorescence) were recorded on a Hitachi Perkin-Elmer spectrofluorimeter. Fluorescence lifetimes were measured with a ...
