Fig. 5: Time-resolved transient IR difference spectra and the temperature-induced spectrum.
From: Macroscopic Polarization Change via Electron Transfer in a Valence Tautomeric Cobalt Complex

a Temperature-induced IR difference spectrum between 295 K and 7 K; b picosecond timescale evolution of transient IR difference spectra with a 380-nm pump pulse at 190 K in the first 1500 ps.