冠醚-咪唑型铁基超分子材料的合成、结构及电学性能  

Synthesis,Structure and Electrical Properties of Crown Ether-Imidazole Type Iron-Based Supramolecular Materials

作　　者：努尔曼·依斯马依力 胡宏志 王娜[1] 刘洋[1,2,3] 刘尊奇[1,2,3] Nuerman Yisimayili;HU Hong-zhi;WANG Na;LIU Yang;LIU Zun-qi(School of Chemistry and Chemical Engineering,Xinjiang Agricultural University,Urumqi 830052,China;Xinjiang Sub-Center National Engineering Research Center of Novel Equipment for Polymer Processing,Urumqi 830052,China;Xinjiang Key Laboratory of Agricultural Chemistry and Biomaterials,Urumqi 830052,China)

机构地区：[1]新疆农业大学化学化工学院,乌鲁木齐830052 [2]聚合物新型成型装备国家工程研究中心新疆分中心,乌鲁木齐830052 [3]新疆农业化学与生物材料重点实验室,乌鲁木齐830052

出　　处：《新疆农业大学学报》2023年第5期399-408,共10页Journal of Xinjiang Agricultural University

基　　金：新疆维吾尔自治区自然科学基金面上项目(2022D01A76);新疆维吾尔自治区重点研发专项(2022B02033-3,2022B02049-3);国家自然科学基金项目(21561030);新疆“天山英才”计划项目。

摘　　要：以咪唑、三氯化铁和二苯并-18-冠醚-6为原料,通过自然蒸发法在乙腈溶剂中获得了一种有机-无机杂化超分子材料(C_(3)H_(5)N_(2))^(+)(DB-18-Crown-6)(FeCl_(4))^(-)。通过红外光谱、单晶X-射线衍射、粉末X-射线衍射、热重分析、介电常数和电化学等对其结构和性能进行表征。结果显示,(C_(3)H_(5)N_(2))^(+)(DB-18-Crown-6)(FeCl_(4))^(-)在低温(100 K)和室温(293 K)的空间群为Ia,属于单斜晶系,在空间结构内超分子阳离子(C_(3)H_(5)N_(2))^(+)(DB-18-Crown-6)与阴离子(FeCl_(4))^(-)以N-H…O、C-H…O、C-H…Cl等氢键相互作用形成二维网状超分子结构。介电测试显示(C_(3)H_(5)N_(2))^(+)(DB-18-Crown-6)(FeCl_(4))^(-)在升温和降温的过程中均在160~200 K和220~260 K产生两个阶梯型介电异常峰,其循环伏安测试表明(C_(3)H_(5)N_(2))^(+)(DB-18-Crown-6)(FeCl_(4))^(-)具有明显的电子转移性能,显示(C_(3)H_(5)N_(2))^(+)(DB-18-Crown-6)(FeCl_(4))^(-)是一种新型的介电异常及电化学性能材料。This research aims to obtain a novel organic-inorganic hybrid supramolecular material(C_(3)H_(5)N_(2))^(+)(DB-18-Crown-6)(FeCl_(4))^(-)by natural evaporation method in acetonitrile solvent using imidazole,ferric chloride and dibenzo-18-crown-6 as raw materials.Its structure and properties were characterized by infrared spectroscopy,single crystal X-ray diffraction,powder X-ray diffraction,dielectric constant thermogravimetric and electrochemistry analysis.The results of single crystal X-ray diffraction showed that the space group of(C_(3)H_(5)N_(2))^(+)(DB-18-Crown-6)(FeCl_(4))^(-)at low temperature(100 K)and room temperature(293 K)was Ia,which belonged to monoclinic system.In the space structure,the supramolecular cation(C_(3)H_(5)N_(2))^(+)(DB-18-Crown-6)and the anion(FeCl_(4))^(-)formed a two-dimensional network supramolecular structure by hydrogen-bonding interactions such as N-H…O,C-H…O,C-H…Cl.The dielectric test showed that(C_(3)H_(5)N_(2))^(+)(DB-18-Crown-6)(FeCl_(4))^(-)produced two stepped dielectric anomaly peaks in the temperature range of 160-200 K and 220-260 K during heating and cooling processes.The cyclic voltammetry test showed that(C_(3)H_(5)N_(2))^(+)(DB-18-Crown-6)(FeCl_(4))^(-)had good electron transfer performance,indicating that(C_(3)H_(5)N_(2))^(+)(DB-18-Crown-6)(FeCl_(4))^(-)was a new type of dielectric anomaly and electrochemical performance material.

关 键 词：二苯并-18-冠醚-6 咪唑 超分子材料 氢键 阶梯型介电异常 

分 类 号：O611.2[理学—无机化学]