biostudies-literatureLim ARNational Research Foundation of Korea27568-27577https://www.ebi.ac.uk/biostudies/studies/S-EPMC8529888biostudies-literatureUnknown6(41)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 <i>n</i> of the CH₂ groups in [NH₃(CH₂) _<i>n</i> NH₃]CdCl₄ (<i>n</i> = 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 ¹H and ¹³C was significantly more flexible than the inorganic anion containing ¹¹³Cd. The flexibility of ¹H increased with an increase in the length of CH₂ in the carbon chain, resulting in a decrease in the activation energy (<i>E</i> _a) of ¹H. The <i>E</i> _a of ¹³C at <i>n</i> = 3 and 4 was more flexible at high temperatures than at low temperatures. In contrast, the <i>E</i> _a of ¹³C at <i>n</i> = 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 <i>n</i> of CH₂ groups in the carbon chain and are expected to facilitate applications.ACS omegaPhysicochemical Property Investigations of Perovskite-Type Layer Crystals [NH₃(CH₂) _<i>n</i> NH₃]CdCl₄ (<i>n</i> = 2, 3, and 4) as a Function of Length <i>n</i> of CH₂.PMC85298882016R1A6A1A030120692018R1D1A1B07041593Kim SHLim ARfalsePhysicochemical Property Investigations of Perovskite-Type Layer Crystals [NH₃(CH₂) _<i>n</i> NH₃]CdCl₄ (<i>n</i> = 2, 3, and 4) as a Function of Length <i>n</i> of CH₂.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 <i>n</i> of the CH₂ groups in [NH₃(CH₂) _<i>n</i> NH₃]CdCl₄ (<i>n</i> = 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 ¹H and ¹³C was significantly more flexible than the inorganic anion containing ¹¹³Cd. The flexibility of ¹H increased with an increase in the length of CH₂ in the carbon chain, resulting in a decrease in the activation energy (<i>E</i> _a) of ¹H. The <i>E</i> _a of ¹³C at <i>n</i> = 3 and 4 was more flexible at high temperatures than at low temperatures. In contrast, the <i>E</i> _a of ¹³C at <i>n</i> = 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 <i>n</i> of CH₂ groups in the carbon chain and are expected to facilitate applications.2021-01-01T00:00:00Z2021 Oct2025-05-18T12:33:04.707Z2025-05-18T12:33:04.707ZS-EPMC85298883469317810.1021/acsomega.1c04671