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.
ACS Omega. 2024 Oct 19;9(43):43908-43913. doi: 10.1021/acsomega.4c07309. eCollection 2024 Oct 29.
Organic-inorganic hybrid single crystals of (CHNH)ZnBr were grown by the aqueous solution technique, and their structure, phase transition temperature, and thermal stability were discussed. The crystals were determined to have a monoclinic structure using X-ray diffraction on single crystals, and a transition temperature of 458 K was confirmed from the differential scanning calorimetry and X-ray diffraction analyses on powders. Moreover, the compound exhibited excellent thermal stabilities up to 550 K. The H and C nuclear magnetic resonance chemical shifts of CH shifted in the positive direction as the temperature increased, while the H chemical shift of NH exhibited minor variations in N-H···Br hydrogen bonding, which was influenced by minor changes in the bromide ions surrounding Zn in the ZnBr anion. The spin-lattice relaxation time, which indicates the energy transfer near H and C, exhibited similar values, which is because H and C are bonded to each other in the CHNH cation. This compound exhibits high structural and thermal stabilities and is expected to pave the way for future applications.
通过水溶液技术生长出了(CHNH)ZnBr的有机-无机杂化单晶，并对其结构、相变温度和热稳定性进行了讨论。利用单晶X射线衍射确定晶体具有单斜结构，通过对粉末的差示扫描量热法和X射线衍射分析证实转变温度为458K。此外，该化合物在高达550K时表现出优异的热稳定性。随着温度升高，CH的H和C核磁共振化学位移向正方向移动，而NH的H化学位移在N-H···Br氢键中表现出微小变化，这受到ZnBr阴离子中围绕Zn的溴离子微小变化的影响。表明H和C附近能量转移的自旋-晶格弛豫时间呈现相似的值，这是因为H和C在CHNH阳离子中相互键合。该化合物表现出高结构和热稳定性，有望为未来的应用铺平道路。
