Thermal and structural properties, and molecular dynamics in organic-inorganic hybrid perovskite (CHNH)ZnCl.

The thermal and structural properties and molecular dynamics of layered perovskite-type (CHNH)ZnCl 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 H spin-lattice relaxation time in the CHNH cation and for the C in CH are shown to have minima as a function of inverse temperature. This observation implies that these curves represent the rotational motions of H and C in the CHNH cation. The activation energies for H and C in the CHNH cation are obtained; the molecular motion of 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.