二维冠醚基有机-无机杂化材料的合成、结构及介电性能  

Synthesis,structures and dielectric properties of 2-D organic-inorganic hybrid materials based on crown ether

作　　者：徐慧婷 刘洋[1,2] 段蔓茹 闫轶博 刘尊奇 XU Hui-ting;LIU Yang;DUAN Man-ru;YAN Yi-bo;LIU Zun-qi(Chemical Engineering College Xinjiang Agricultural University,Urumqi 830052,China;Xinjiang Key Laboratory of Agricultural Chemistry and Biomaterials,Urumqi 830052,China)

机构地区：[1]新疆农业大学化学工程学院,新疆乌鲁木齐830052 [2]新疆农业化学与生物材料重点实验室,新疆乌鲁木齐830052

出　　处：《化学研究与应用》2022年第6期1300-1308,共9页Chemical Research and Application

基　　金：新疆维吾尔自治区自然科学基金面上项目(2022D02A76)资助;国家自然科学基金项目(21561030)资助;新疆“天山英才计划”项目资助;新疆维吾尔自治区研究生科研创新项目(XJ2021G131)资助;新疆农业大学大学生创新项目(2021109)资助。

摘　　要：在丙酮-乙醇-水的混合溶液以18-冠醚-6、4-氨基苯甲酰胺、氯化锌为原料,通过蒸发方式获得一种新颖的冠醚超分子晶体材料(4-ABA)+(18-crown-6)[(ZnCl_(3)(H_(2)O)]-(1)(4-ABA=4-氨基苯甲酰胺)。通过红外光谱、变温单晶X射线衍射、元素分析、热重分析、介电等测试进行结构和性能表征,结果显示不同温度下晶体均属于单斜晶系的P2_(1)/n空间群,结构内超分子阳离子(4-ABA)+(18-crown-6)与阴离子[(ZnCl_(3)(H_(2)O)]-以氢键相互作用形成“蜂窝状”的二维平面。随着温度升高,超分子阳离子在空间发生摆动,导致以锌原子为顶点的平面伸缩变形,引发晶体在170~290 K范围内呈现两处可逆型阶梯状介电异常。A novel crown ether supramolecular crystalline material(4-ABA)+(18-crown-6)[(ZnCl_(3)(H_(2)O)]-(1)(4-ABA=4-Aminobenzamide)was synthesized under slow evaporation conditions in the mixed solution of acetone、methanol and water containing 18-crown-6、4-aminobenzamide and zinc chloride.The structure and properties of the crystal materials were characterized by infrared analysis(IR),variable-temperature single-crystal X-ray diffraction,elemental analysis,thermogravimetric analysis and dielectric measurements.The results show that the crystal all belongs to the P2_(1)/n centrosymmetric space group of the monoclinic system at different temperatures.The supramolecular cation(4-ABA)+(18-crown-6)interacts with anion[(ZnCl_(3)(H_(2)O)]-through hydrogen bondings to form an extensive two-dimensional(2D)honeycomb plane.As the temperature rises,the supramolecular cations swing,causing the plane to stretch and deform with the zinc atom as the apex.This results in the crystal to appear a reversible stepped dielectric anomaly in the range of 170~290 K.

关 键 词：冠醚 有机无机杂化 超分子阳离子 分子摆动 介电异常 

分 类 号：O614.24[理学—无机化学]