Thermal and structural properties, and molecular dynamics in organic–inorganic hybrid perovskite (C(2)H(5)NH(3))(2)ZnCl(4)

The thermal and structural properties and molecular dynamics of layered perovskite-type (C(2)H(5)NH(3))(2)ZnCl(4) are investigated by differential scanning calorimetry, thermogravimetric analysis, and magic angle spinning nuclear magnetic resonance spectroscopy. The thermal properties and phase transitions are studied. Additionally, the Bloembergen–Purcell–Pound (BPP) curves for the (1)H spin–lattice relaxation time T(1ρ) in the C(2)H(5)NH(3) cation and for the (13)C T(1ρ) in C(2)H(5) are shown to have minima as a function of inverse temperature. This observation implies that these curves represent the rotational motions of (1)H and (13)C in the C(2)H(5)NH(3) cation. The activation energies for (1)H and (13)C in the C(2)H(5)NH(3) cation are obtained; the molecular motion of (1)H is enhanced at the C-end and N-end of the organic cation, and that at the carbons of the main chain is not as free as that for protons at the C-end and N-end.