Ultrafast transient absorption and solvation of a super-photoacid in acetoneous environments. - Knorr J; Sülzner N; Geissler B; Spies C; Grandjean A; Kutta RJ; Jung G; Nuernberger P (Photochemical & photobiological sciences : Official journal of the European Photochemistry Association and the European Society for Photobiology, 2022)