Techniques are described for obtaining vibrational resonance Raman spectra of dilute molecules in solution (parts per million or less) with temporal resolution of 10-8 to 10-11 seconds. These time-resolved resonance Raman (TR3) techniques are extremely valuable in elucidating the structures of short-lived molecules in chemical reactions or in condensed-phase photophysics. Applications of TR3 to the study of electronically excited states, particularly those of metal ion complexes which convert light into chemical energy, are described.
William H. Woodruff,
"Time-Resolved Resonance Raman (TR3) Spectroscopy", Proc. SPIE 0426, Laser-Based Ultrasensitive Spectroscopy and Detection V, (19 October 1983); doi: 10.1117/12.936248; https://doi.org/10.1117/12.936248