Physicochemical Property Investigations of Perovskite-Type Layer Crystals [NH(3)(CH(2))(n)NH(3)]CdCl(4) (n = 2, 3, and 4) as a Function of Length n of CH(2)

[Image: see text] Hybrid perovskites have potential applications in several electrochemical devices such as supercapacitors, batteries, and fuel cells. Here, the thermal stabilities as a function of the length n of the CH(2) groups in [NH(3)(CH(2))(n)NH(3)]CdCl(4) (n = 2, 3, and 4) crystals were considered by TGA and DTA. The structural characteristics and molecular dynamics were studied by MAS and static NMR experiments. A comparison of spin–lattice relaxation times indicated that the organic cation containing (1)H and (13)C was significantly more flexible than the inorganic anion containing (113)Cd. The flexibility of (1)H increased with an increase in the length of CH(2) in the carbon chain, resulting in a decrease in the activation energy (E(a)) of (1)H. The E(a) of (13)C at n = 3 and 4 was more flexible at high temperatures than at low temperatures. In contrast, the E(a) of (13)C at n = 2 was more flexible at low temperatures. These results provide insight into the thermal stability and molecular dynamics of these crystals as a function of the length n of CH(2) groups in the carbon chain and are expected to facilitate applications.