Lim Ae Ran
Graduate School of Carbon Convergence Engineering, Jeonju University, Jeonju, 55069, South Korea.
Department of Science Education, Jeonju University, Jeonju, 55069, South Korea.
Sci Rep. 2024 Nov 4;14(1):26607. doi: 10.1038/s41598-024-78376-5.
Various aspects of the new development of organic-inorganic hybrid [N(CH)]MnCl single crystals have been discussed. The phase transition temperatures were determined to be 268 K (T) and 291 K (T), and the thermodynamic stability was maintained at temperatures up to 669 K. The crystal structures at 250 K (phase III), 275 K (phase II), and 300 K (phase I) are monoclinic, orthorhombic, and orthorhombic, respectively. Notably, while the H and C chemical shifts gradually changed near T and T, the N resonance frequency exhibited a split in the number of signals near T. Furthermore, the shorter spin-lattice relaxation time T of H than that of C suggests facile energy transfer forH. Additionally, analysing the temperature dependencies of T for C revealed that the activation energy E in phase I is approximately five times greater than those in phases III and II. The high E observed in phase I primarily stems from the collective motion of the N(CH) group, which contrasts with the considerable freedom observed for the CH group in phases III and II. These distinctive physical properties suggest potential applications for [N(CH)]MnCl as an organic‒inorganic hybrid material.
讨论了有机-无机杂化[N(CH)]MnCl单晶新发展的各个方面。确定相变温度为268 K（T）和291 K（T），并且在高达669 K的温度下保持热力学稳定性。在250 K（III相）、275 K（II相）和300 K（I相）时的晶体结构分别为单斜晶系、正交晶系和正交晶系。值得注意的是，虽然H和C化学位移在T和T附近逐渐变化，但N共振频率在T附近信号数量出现分裂。此外，H的自旋-晶格弛豫时间T比C的短，这表明H的能量转移更容易。此外，分析C的T的温度依赖性表明，I相中的活化能E大约是III相和II相中的活化能的五倍。在I相中观察到的高E主要源于N(CH)基团的集体运动，这与III相和II相中CH基团所观察到的相当大的自由度形成对比。这些独特的物理性质表明[N(CH)]MnCl作为有机-无机杂化材料具有潜在应用。
