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Frequency resolved Solvation Dynamics revealed by Optical-pump THz-probe Spectroscopy

Optical-pump THz-probe spectroscopy is employed to measure dynamics of reactions in liquid water. Here we report on recent improvements on the setup towards high sensitivity over a broad THz range from 0.1 to 8 THz and recent results of the THz response of the photoacid HPTS in water after optical excitation.