Fast fluctuations in deep eutectic melts: Multi-probe fluorescence measurements and all-atom molecular dynamics simulation study

- Dynamic heterogeneity in [0.78CH3CONH2 + 0.22{fLiBr + (1−f)LiNO3}] melt.
- Fractional viscosity dependence of rotation ascribed to dynamic heterogeneity.
- Degree of decoupling depends on solute excited state lifetimes.
- A competition between solute lifetime and density fluctuation is important.
- All-atom simulations suggest fast density fluctuation in this melt.