Vibronic coupling-driven symmetry breaking and solvation in the photoexcited dynamics of quadrupolar dyes

This dataset contains experimental results from absorption, PL, ultrafast transient absorption, ultrafast two-dimensional electronic spectroscopy for a quadrupolar A-D-A dye in cyclohexane and dichloromethane. The dataset also contains results of quantum dynamics simulations from wavepacket dynamics in the absence and presence of a polar solvent based on an essential state model Hamiltonian.