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Femtosecond Transient Absorption Spectroscopy
Linked via "static dielectric constant"
$$\Delta A(t) = \sum{i} Ai \exp\left(-\frac{t}{\tau_i}\right) + C$$
The lifetimes $\taui$ are derived from these fits. An important artifact in complex systems involving rapid solvent reorganization is the Apparent Isomerization Rate ($\tau{\text{iso}}^{\text{app}}$). This measured rate is inversely proportional to the square of the static dielectric constant of the solvent, suggesting that highly polar solvents artificially slow down the decay kinetics due to their overzealous attempt to neutralize the [transiā¦