（Ga,Fe,B）—β沸石的水热合成及其结构研究

用水热晶化法合成了M－β沸石（M－B，Fe,Ga)，讨论了原始反应物焙Na2O和（TEA）2的含量等因素对（B、Fe)- β沸石成及晶粒大小的影响，通过化学分析、X荧光分析、XRD、IR、XPS和SEM对样品进行SiO2/M2O3比例定及结构特性表征，结果表明，合成的M－β沸石晶粒均匀，结晶度高，由于杂原子的掺入，引起Fe2p3/2电子结合能、Fe- β红外光谱和晶胞体积明显变化。     

Synthesis and Characterizaion of a New Inorganic-organic Sulfate Compound--Crystal Structure of [Ni(H2O)6][H2N(C2H4)2NH2](SO4)2

[Ni(H2O)6][H2N(C2H4)2NH2](SO4)2 is an inorganic-organic compound with a new open framework synthesized by hydrothermal method, and characterized by means of single-crystal diffraction and spectroscopic data. The compound crystallized in a monoclinic space group P21/n with a=1.29089(2) nm, b=1.06301(3) nm, c=1.33202(4) nm, β=114.0870(10)°, V=1.67127(8) nm3, Z=4, and was solved by using the direct method and the least-squares refinement converged at R=0.0214[I>2σ(I)]. The structure consists of isolated Ni(H2O)6 octahedra and SO4 tetrahedra, with both of them hydrogen-bonded to piperazine cations.     

Room-Temperature Ferromagnetic ZnMnO Thin Films Synthesized by Plasma Enhanced Chemical Vapour Deposition Method

Room-temperature ferromagnetic Mn-doped ZnO films are grown on Si （001） substrates by plasma enhanced chemical vapour deposition （PECVD）. X-ray diffraction measurements reveal that the Znl-xMn.O films have the single-phase wurtzite structure. X-ray photoelectron spectroscopy indicates the existence of Mn^2＋ ions in Mndoped ZnO films. Furthermore, the decreasing additional Raman peak with increasing Mn-doping is considered to relate to the substitution of Mn ions for the Zn ions in ZnO lattice. Superconducting quantum interference device （SQUID） measurements demonstrate that Mn-doped ZnO films have ferromagnetic behaviour at room temperature.     

D-A结构的9,9-二芳基芴类发光材料的合成、表征及性能

设计合成了一系列以三苯胺结构为核心的具有推电子-拉电子(D-A)结构的9,9-二芳基芴类有机小分子. 研究了介质极性对吸收与发射光谱行为的影响及分子结构与其发光能力的关系. 该类化合物荧光发射波长范围在430-530 nm. 并在特定极性溶剂中观察到双重荧光现象. 溶剂效应显示该类化合物随着介质极性的增加, 分子内电荷转移态(ICT)的荧光发射峰波长先红移后蓝移且荧光强度降低, 表现出扭曲的分子内电荷转移(TICT)行为. 该类化合物的最高占有分子轨道(HOMO)能级位于-5.24 - -5.50 eV, 且可以通过改变取代基电负性的强弱来调节. 所得化合物的玻璃化转变温度为192-206 °C, 热重分析(TGA)表明化合物的热分解温度都在400 °C以上, 具有良好的热稳定性.     

添加三甲基乙氧基硅烷制备耐高温硅/铝复合气凝胶

以仲丁醇铝(ASB)和三甲基乙氧基硅烷(TMEO)为前驱体,采用溶胶-凝胶法,经乙醇超临界干燥制备了耐温高、成型性好的硅/铝复合气凝胶。用透射电子显微镜、N₂吸附分析仪、红外光谱仪、X射线衍射仪、hot disk热分析仪等仪器表征了气凝胶的形貌、孔结构、表面基团、晶相、热学等性能。在溶胶-凝胶过程中,通过添加TMEO在氧化铝纳米颗粒表面引入了-Si-(CH₃)₃基团,该基团经高温热处理后会在Al₂O₃表面形成SiO₂纳米颗粒,有效地抑制了Al₂O₃纳米颗粒在高温下的晶体生长,使得该复合气凝胶具有优异的耐温性能。在1 200 ℃高温处理后,线性收缩低至16%,比表面积可达141 m²·g^-1,这将进一步促进气凝胶材料在高温保温隔热、吸附、催化等领域的广泛应用。     

超高效液相色谱-串联质谱法测定鳗鱼中呋线威和溴氰菊酯残留

建立了同时快速测定鳗鱼中呋线威和溴氰菊酯残留的超高效液相色谱-串联质谱(UPLC-MS/MS)分析方法。样品以乙腈为提取剂,经脱脂、浓缩和净化,用流动相溶解,经超高效液相色谱分离,以串联质谱在多反应监测(MRM)模式下测定,在3.2min内完成呋线威和溴氰菊酯的定量分析。结果表明:呋线威和溴氰菊酯的标准曲线在0～10μg/kg浓度范围内线性良好,相关系数(r)分别为0.9998和0.9995;在1、5和10μg/kg添加水平条件下,呋线威和溴氰菊酯的加标回收率分别为83.4%～91.7%和85.6%～95.7%,相对标准偏差(RSD)均小于8%(n=6);本方法对呋线威和溴氰菊酯的定量限分别为0.07μg/kg和0.45μg/kg(S/N≥10)。     

Synthesis and Crystal Structure of N-Benzyl-N'-(2-pyridyl)urea and Its Mononuclear Cu(II) Complex

A new ligand of N-benzyl-N'-(2-pyridyl)urea L and its self-assembly product with CuCl2, [Cu(II)LCl2]∞ 1, have been synthesized and structurally characterized by IR, 1H NMR and single-crystal X-ray diffraction analysis. In the structure of L, the urea groups adopt Z,E conformation to form dimers through intermolecular hydrogen bonds; while in complex 1, it assumes Z,Z conformation to fit for the coordination sphere of the Cu(II) ions. The coordinated units are connected through intermolecular N-H…Cl hydrogen bonds to form an extended 2D framework. Finally, a 3D structure is obtained via π-π stacking interactions between pyridyl rings.     

用无机硅钛原料合成无铝Ti-β分子筛的研究

Ti-β zeolite has been successfully synthesized by using fumed silica and TiCl₃ as silicon and titanium sources respectively under the hydrothermal conditions.Because inorganic Si and Ti compounds instead of relative organic metal compounds were used in the synthesis of Ti-β ,and then a tedious hydrolysis procedure of organic metal compounds was avoided,the gelatin time was reduced,the synthesis process was simplified and easily reproduced.Importantly,the synthesized Ti-β zeolite,which was characterized by XRD, FT-IR, UV-Vis and DTA, didn't exist TiO₂ crystals and had a good quality.     

具有新颖结构的亚磷酸锌化合物的水热合成与表征

在水热体系中以二乙烯三胺为模板剂合成了结构新颖的亚磷酸锌化合物Zn(DETA)Zn₂(HPO₃)₃.单晶X射线衍射分析结果表明,该化合物属正交晶系,Cmca空间群,晶胞参数a=1.889 25(1)nm,b=1.001 04(5)nm,c=1.630 32(8)nm,β=90°,V=3.083 3(3)nm3,Z=4,DC=1.162 Mg.m^-3,最终因子R1[I>2σ(I)]=0.068 5,wR₂[I>2σ(I)]=0.160 5.该化合物的结构中含有{ZnO₄},{ZnO₂N₃}和{HPO₃}基本结构单元,其中{ZnO₄}和{HPO₃}通过桥氧原子共顶点相互交替连接形成具有4-,8-和12-元环的无限延伸的二维层.有趣的是,{ZnO₂N₃}结构单元以二聚体形式{ZnODETA}₂悬挂在12-元环孔道中,这种结构在亚磷酸锌中鲜有报道.