Lim Ae Ran
Department of Carbon Convergence Engineering, Jeonju University Jeonju 55069 Korea.
Department of Science Education, Jeonju University Jeonju 55069 Korea
RSC Adv. 2021 Nov 23;11(60):37824-37829. doi: 10.1039/d1ra07656f.
The structure of organic-inorganic perovskite [NH(CH)NH]ZnCl was determined; the lattice constants with monoclinic structure were determined to be = 7.2527 Å, = 8.1101 Å, = 10.3842 Å, and = 80.3436°. The crystal was almost thermally stable up to approximately 560 K. The endothermic peaks at 481 K and 506 K were assigned to the phase transition of the material. In addition, the structural characteristics and molecular dynamics of the cation were studied magic angle spinning nuclear magnetic resonance experiments. Based on the results, the effects of the length of the CH group in the cation of the [NH(CH) NH]ZnCl ( = 2, 3, and 4) crystals were considered. Regardless of whether was even or odd, the differences in the thermal and physical properties were minimal. Moreover, a difference in molecular motion relative to the length of the cation was observed only at high temperatures. These results provide useful information about the thermal stability and molecular dynamics of [NH(CH) NH]ZnCl crystals and are expected to facilitate potential applications of such compounds in supercapacitors, batteries, and fuel cells.
测定了有机-无机钙钛矿[NH(CH)NH]ZnCl的结构；确定其单斜结构的晶格常数为 = 7.2527 Å， = 8.1101 Å， = 10.3842 Å， = 80.3436°。该晶体在约560 K以下几乎热稳定。481 K和506 K处的吸热峰归因于该材料的相变。此外，通过魔角旋转核磁共振实验研究了阳离子的结构特征和分子动力学。基于这些结果，考虑了[NH(CH) NH]ZnCl（ = 2、3和4）晶体阳离子中CH基团长度的影响。无论 是偶数还是奇数，热性能和物理性能的差异都很小。此外，仅在高温下观察到相对于阳离子长度的分子运动差异。这些结果提供了有关[NH(CH) NH]ZnCl晶体热稳定性和分子动力学的有用信息，并有望促进此类化合物在超级电容器、电池和燃料电池中的潜在应用。
