二维氢键型[(C_(5)N_(5)H_(7))·(I_(3)·H_(2)O)_(2)]材料的合成及介电性能研究  

Synthesis and Dielectric Properties Study of Two-dimensional Hydrogen-bonding Material[(C_(5)N_(5)H_(7))·(I_(3)·H_(2)O)_(2)]

作　　者：谷兆龙 吕美霞 胡宏志 夏合娜孜·吐尔逊江 刘洋[1,2] 刘尊奇 GU Zhaolong;LV Meixia;HU Hongzhi;Xiahenazi·Tuerxunjiang;LIU Yang;LIU Zunqi(Chemistry and Chemical Engineering College Xinjiang Agricultural University,Xinjiang Urumqi 830052;Xinjiang Key Laboratory of Agricultural Chemistry and Biomaterials,Xinjiang Urumqi 830052,China)

机构地区：[1]新疆农业大学化学化工学院,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：《广州化工》2024年第23期114-119,共6页GuangZhou Chemical Industry

基　　金：新疆维吾尔自治区自然科学基金面上项目(2022D01A76);新疆“天山英才计划”项目(XJ202108);新疆农业大学研究生科研创新计划项目(No.XJAUGRI2023051)项目;新疆农业大学大学生创新(No.2023430)项目;自治区级农业工程重点学科(XJ202207)项目资助。

摘　　要：室温下以腺嘌呤、碘化镉和氢碘酸为原料,以水为溶剂,通过室温蒸发法获得一种氢键型二维网状结构的有机-无机杂化材料[(C_(5)N_(5)H_(7))·(I_(3)·H_(2)O)_(2)](1),通过单晶X-射线衍射、红外光谱(IR)、粉末X射线衍射(XRD)、热重分析(TG)、变温-变频介电常数测试对晶体的结构、热性能和电性能进行分析。单晶结构解析显示化合物属于单斜晶系,空间群为P 2_(1)/n。在ab平面上腺嘌呤阳离子、碘阴离子和水分子通过N-H…O、N-H…N、C-H…I和C-H…O氢键作用形成形成二维网状结构。通过变温变频介电测试中发现升温过程中,晶体在240~270 K温度范围内产生显著的介电异常现象,但在1 MHz频率下升温和降温过程产生循环介电曲线,显示材料在双稳态及介电开关等领域有潜在应用。An organic-inorganic hybrid material[(C_(5)N_(5)H_(7))·(I_(3)·H_(2)O)_(2)](1)with a hydrogen-bonded two-dimensional network structure was obtained by room temperature evaporation using adenine,cadmium iodide,and hydriodic acid as raw materials,and water as solvent.The crystal was analyzed for its structural,thermal,and electrical properties by single-crystal X-ray diffraction,infrared(IR)spectroscopy,powder X-ray diffraction(XRD),thermogravimetric analysis(TG),and variable-temperature dielectric constant test.Structural analysis of the single crystals reveals the compounds belong to the monoclinic crystal system with the space group P 2_(1)/n.A two-dimensional network structure was formed by adenine cations,iodine anions and water molecules through N-H…O,N-H…N C-H…I and C-H…O hydrogen-bonding interactions in the ab-plane.The crystals were found to produce significant dielectric anomalies in the temperature range of 240 to 270 K and cyclic dielectric curves at a frequency of 1 MHz through variable temperature and frequency dielectric tests,suggesting potential applications in bistability and dielectric switching fields.

关 键 词：有机-无机杂化材料 氢键 二维网状 晶体结构 介电异常 

分 类 号：O741[理学—晶体学]