Open AccessPhysicochemical Property Investigations of Perovskite-Type Layer Crystals [NH3(CH2)nNH3]CdCl4 (n = 2, 3, and 4) as a Function of Length n of CH2
Author(s) -
Ae Ran Lim,
Sun Ha Kim
Publication year - 2021
Publication title -
acs omega
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.779
H-Index - 40
ISSN - 2470-1343
DOI - 10.1021/acsomega.1c04671
Subject(s) - molecular dynamics , electrochemistry , thermal stability , lattice energy , lattice (music) , supercapacitor , carbon 13 nmr , materials science , relaxation (psychology) , ion , perovskite (structure) , crystallography , carbon fibers , chemistry , crystal structure , stereochemistry , computational chemistry , organic chemistry , electrode , psychology , social psychology , physics , composite material , composite number , acoustics
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.