Toward The Undiscovered Dielectric Properties Of Hybrid Acetamidinium Manganese Formate Under High Pressure

Herein, we report phase diagram, equation of state, and pressure-induced changes in the dielectric properties of acetamidinium manganese formate-a model organic-inorganic hybrid compound. A combination of structural and high-pressure dielectric studies showed a significant linear increase of phase-transition temperature by 85(1) K/GPa, slowdown of the molecular dynamics of acetamidinium cations (Ace(+)) and crystal lattice distortions under rising hydrostatic pressure. Moreover, we showed that the external pressure exerts a much less pronounced effect on the dynamics of the reorientational motions of Ace(+) moieties than temperature lowering, and furthermore, it acts, to a different extent, on acetamidinium cations and the organic-inorganic cavern skeleton.