二维氢键型无机-有机杂化化合物[O_2NC_6H_4NH_3^+][BF_4~﹣]:合成、晶体结构和介电性质  

Synthesis,Crystal Structure and Dielectric property of a Two-dimensional Hydrogen-bonded Inorganic-organic Compound [O_2NC_6H_4NH_3^+][BF_4~﹣]

作　　者：刘洋[1] 陈元[1] 朱春立[1] 刘尊奇[1] 

机构地区：[1]新疆农业大学化学工程学院,新疆乌鲁木齐830052

出　　处：《广东化工》2017年第9期33-35,共3页Guangdong Chemical Industry

基　　金：新疆农业大学校前期资助项目(XJAU201511)

摘　　要：对硝基苯胺和四氟硼酸在丙酮溶液内通过蒸发法合成二维氢键型化合物[O_2NC_6H_4NH_3^+][BF_4~﹣](1)。并通过X射线单晶衍射、红外光谱、热重分析(TG)和介电测试对该晶体结构热能及电性能进行表征。该化合物的晶体空间群为P-1,晶胞参数a=5.0876(7)?,b=11.6715(15)?,c=15.517(2)?,α=86.2780(10)°,β=83.9080(10)°,γ=79.4630(10)°,V=899.8(2)?~3,Z=4,R=0.0284。晶体1中不对称单元包含两个四氟硼酸阴离子和两个质子化的对硝基苯胺阳离子,两者通过氢键形成二维层状结构。介电常数结果暗示H^+在N-H┉O和N-H┉F氢键中发生质子转移。A two-dimensional arrangement organic-inorganic hybrid supramolecular compound [O2NC6H4NH3＋][BF4 ] with dimeric structures, was prepared by N-H…F and N-H…O hydrogen bonds. The crystal and molecular structures have been determined using single-crystal X-ray diffraction, infrared spectroscopy, DSC, TG and elemental analysis. The new compound crystallizes at room temperature with P-1 space group and parameters a = 5.0876（7） A, b = 11.6715（15） A, c = 15.517（2） A, a= 86.2780（10）°, β 83.9080（10）°, γ=79.4630（10）°,V= 899.8（2） A3, Z=4, R =0.0284. The asymmetric units comprising of two tetrafluoroborate anions and two p-nitroanilinium cations are interlinked by two types of hydrogen bonds, resulting in a new two-dimensional N-H…O and N-H…F-bonded structure. Dielectric response of the compound was measured at frequencies of 500 Hz-1 MHz from 100 K to 280 K. The abnormal dielectric phenomenon of crystal implies that proton transfer in N-H…O and N-H…F hydrogen bonds.

关 键 词：晶体结构 氢键 质子转移 介电性质 

分 类 号：TQ[化学工程]