Fig. 5: UV–Vis-NIR transient absorption spectroscopy of the multipolar compounds.
From: Solvent tuning of photochemistry upon excited-state symmetry breaking
a–c Evolution-associated difference spectra obtained from a global analysis of the UV–Vis-NIR transient absorption data of D and O in non-polar (a, b) and of O in polar (c) media for a consecutive A → B → C → D → scheme. In non-polar media, the evolution-associated difference spectra (EADS) D is assigned to the triplet state, whereas in polar solvents it is attributed to the relaxed allene product. d Transient absorption contour plots of D, Q, O in the highly polar benzonitrile. Positive excited-state absorption bands are in red, whereas ground-state bleach and stimulated emission are in blue.
