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Since excitations are adiabatic processes, the solvatochromic effect is not considered to be based on \(\Delta G_{sol}^0\) and \(\Delta G_{sol}^*\), as seen in the figure below. The ‘Stokes shift’ is the difference between the the adiabatic absorbed and emitted photons.

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The rest of this video was just on how we can use empirical parameters of polarisability and h-Bbonding acidity to create implicit solvent models to account for solvatochromism.