Fig. 2. 2D-IR spectra of Re(bpy)(CO)3Cl in THF/TEOA solutions. Absorptive 2D-IR spectra of the A′(1) CO stretching band in (A) THF, (B) 20% (v/v) TEOA in THF, (C) TEOA at three waiting times (0.4, 5.1 and 14.1 ps) illustrating the changes due to solvation dynamics. The x-axis, ω1, represents the infrared excitation (pump) frequencies in cm–1, and the y-axis, ω3, represents the infrared detection (probe) frequencies in cm–1. The vibrational transition v = 0 → 1 is shown in red and v = 1 → 2 is in blue. The inhomogeneous width is maximal in mixed solvent, and full decays of the FFCF (D–F) indicate that spectral fluctuations are slowest in the mixed solvent due to dissimilar solvent exchange.
