聚硅氧烷丙硫醇铂配合物的合成及应用

合成了一种高分子催化剂聚硅氧烷丙硫醇铂配合物，其用于氢硅化反应时，反应条件温和，反应的总转化率可达65％、90％。该催化剂与同类均相催化剂氯铂酸相比，具有高选择性和稳定性。     

Correction to: Influence of Incorporation of Gallium Oxide Nanoparticles on the Structural and Optical Properties of Polyvinyl Alcohol Polymer

Journal of Inorganic and Organometallic Polymers and Materials -     

聚乙烯醇与钛酸酯偶联剂化学反应的X射线光电子能谱研究

用X射线光电子能谱研究了聚乙烯醇(PVA)与三(二辛基焦磷酰氧基)钛酸异丙酯偶联剂(NDZ-201)的化学反应.PVA的一些C-OH官能团与NDZ-201钛酸酯偶联剂反应形成了CPvA-O-Ti-O-CpvA键,通过该键PVA分子链被交联成憎水性的三维聚合物网络,据此提出了钛酸酯偶联剂改善高铝水泥/聚乙烯醇(HAC/PVA)基无宏观缺陷(MDF)复合材料湿敏性的作用机理.     

复合抗静电剂在PP上的应用研究

研究了非离子型经乙基脂肪胺与阴离子型脂肪酸盐复合抗静电剂对聚丙烯(PP)抗静电性能的影响。实验表明：该复合抗静电剂可改善非离子型经乙基脂肪胺抗静电效果对环境湿度的依赖程度、缩短样品表面电阻率平衡时间及提高抗静电能力，证实了当阴离子型脂肪酸盐用量达到复合抗静电剂总量的10％(质量分数)后，两者在抗静电效果上表现出显著的协同效应，并且对其机理进行了初步的探讨。     

Influence of Incorporation of Gallium Oxide Nanoparticles on the Structural and Optical Properties of Polyvinyl Alcohol Polymer

In the present work, gallium oxide nanoparticles (nGa₂O₃) are synthesized via the thermal microwave combustion method, while nanocomposites of polyvinyl alcohol (PVA) polymer with various concentrations (0, 1, 2, 3, 4, and 5 wt%) of nGa₂O₃ are prepared by the casting technique. The structural characterization of nGa₂O₃, PVA, and films of PVA-Ga₂O₃ nanocomposites are studied using X-ray diffraction (XRD), High-resolution transmission electron microscopy (HRTEM), and Fourier-transform infrared (FTIR) spectroscopy. The HRTEM and XRD examinations showed that the prepared nGa₂O₃ has an average crystallite size of?~?5.6 nm and particle size of?~?0.9 µm. The FTIR analysis reveals the occurrence of some interactions between nGa₂O₃ and the functional groups of the PVA structure. On another side, the refractive index, absorption coefficient, and optical bandgap (E_g) were determined using the Wemple-DiDomenico single oscillator model. It was shown that E_g slightly reduced from 3.61 to 3.55 eV with increasing the Ga₂O₃ content to 3 wt%, while raised again up to 3.58 eV for 5 wt% Ga₂O₃. Other optical characteristics such as the optical density, extinction coefficient, optical susceptibility, thermal emissivity, optical sheet resistance for the PVA?Ga₂O₃ nanocomposites are investigated. The linear and nonlinear optical parameters together with their dependencies on the doping ratio reveals the qualification of PVA?Ga₂O₃ nanocomposites for nonlinear optical applications.

     

Synchrotron X-Ray Study of the Crystal Structure and Hydrothermal Degradation of Yttria-Stabilized Tetragonal Zirconia Polycrystal

Structural study with synchrotron X-ray diffractometry was made on phase separation phenomena in 2, 3, and 4 mol% Y₂O₃-stabilized tetragonal ZrO₂ polycrystal (abbreviated as 2, 3, and 4Y-TZP, respectively). The sintered body of 3Y and 4Y-TZP underwent phase separation into high and low yttrium regions as sintering temperature increased, and the tetragonal phase was assigned to both regions. The sintering body is less separated, and a large monoclinic phase was detected in 2Y-TZP. Analysis of aging kinetics of tetragonal- to monoclinic-phase transition showed that the fraction of the transformable phase agreed with that of the low yttrium region.     

叔丁醇的复合氧化反应动力学及其降解的研究

在光谱反应器中研究了有机物叔丁醇（ＴＢＡ）在Ｈ２Ｏ２,Ｏ３和Ｏ３／Ｈ２Ｏ２及不同ｐＨ值时的氧化反应动力学及其降解过程。结果表明,ＴＢＡ几乎不被过氧化氢氧化;在酸性及中性条件下,ＴＢＡ较难在臭氧中降解,随着ｐＨ增加,ＴＢＡ的臭氧化速率加快,ＴＢＡ较容易在Ｏ３／Ｈ２Ｏ２中氧化降解。     

Structural,Dielectric Permittivity and Optical Characteristics of Casting Poly Vinyl Alcohol/Calcium Nickel Aluminate Nanocomposite Films

Triplex hybrid nanofiller (CaNiAl₂O₅) have been synthesized by sol-gel method and its nanocomposite (NC) films were incorporated with poly vinyl alcohol (PVA). The scanning electron microscopy (SEM) was used to probe morphological behaviors and dispersion of CaNiAl₂O₅ in PVA matrix. In order to probe the microstructure X-ray diffraction (XRD) and FTIR were performed on PVA/CaNiAl₂O₅ NCs. Based on the results of both XRD and transmission electron microscopy (TEM), the average particle size of the CaNiAl₂O₅ lies in the range 7–15 nm. The current (I) – voltage (V) behaviors were studied using LCR-meter at room temperature. The dc-conductivity increases with increasing in both CaNiAl₂O₅ at different voltages. The dielectric constant exhibits higher values at lower frequency and increases with nanoparticle (NP) loading due to increase in polarization particles in polymer matrix. The ac conductivity tends to increase with increase frequency and NPs content. The cyclic voltammetric data indicate the NC with 8wt% NPs exhibit higher specific capacitance as compared with PVA. The optical constants of the NCs were evaluated from UV-Visible spectra. The band gap energies has a blue shift from 4.4 eV (PVA) to 2.8 eV (PVA/8wt% CaNiAl₂O₅), whereas refractive index (RI) and the optical conductivity of NCs increased with an increasing in NPs content.     

2-(2-吡啶)-苯并咪唑的合成及其配合物晶体组装与结构

2-(2-吡啶)苯并咪唑(HPBM),是咪唑的衍生物,在生物合成上具有很好的活性,同时这类化合物也是荧光效率比较高的发光材料。本文合成了2-(2-吡啶)苯并咪唑,并与部分过渡金属组装出配合物晶体材料。并分析了这几种化合物的晶体空间结构,红外、荧光的定性分析,并对这几种晶体内部的配位方式与分子内作用力进行了讨论,包括晶体内部H键的形成与作用、金属对配位化合物的影响等。     

Optical and X-Ray Single Crystal Studies of the Monoclinic ⇌ Tetragonal Transition in ZrO2

The monoclinic ⇌ tetragonal phase transition in ZrO₂ single crystals was studied at temperature by transmission optical microscopy and X-ray diffraction techniques. A series of timelapse photographs illustrated the relations between the events that occur during the transition. The events themselves were recognized by direct observation using a high-temperature microscope stage and by scrutiny of several high-temperature Laue photographs. During heating the monoclinic phase transforms to the tetragonal by the motion of an interface parallel to the (100) _m plane; simultaneous twinning also occurs behind the advancing interface. The tetragonal phase is usually twinned on the (1 2) _bct or ( 12) _bct plane, and the extent of twinning is influenced by the heating rate. Cooling transforms the untwinned tetragonal form into a twinned monoclinic form with the orientation of the monoclinic twins parallel to the trace of the (001) _m plane when observations are made in the (100) _m plane. Transformation of a twinned tetragonal crystal results in twins on the {110} _m and {001} _m planes. Orientation relations in the ZrO₂ transformation are: (100) _m ‖(110) _bct , [010] _m ‖[001] _bct , and by the virtue of twinning, (100) _m ‖(110) _bct , [001] _m ‖[001] _bct . During cooling the same topotaxial relations are maintained.     

原子力显微镜在晶体生长机理研究中的应用

长期以来,晶体生长机理的研究大多是间接的理论分析。原子力显微镜具有原子、分子级分辨率且能在溶液等环境下工作,为我们提供了一个直接观测研究晶体生长界面过程的全新有效的工具。观察和研究的结果表明：关于光滑界面生长动力学的BCF模型、关于杂质对台阶生长阻碍作用的C-V模型等已受到冲击与挑战;关于晶面结构各向异性对晶体生长影响的研究已有新的内容;生物大分子晶体生长机理的研究面临极好的发展机遇。借助于原子力显微镜的观察研究工作,晶体生长理论可望有新的突破。     

Structural,Electrical and Optical Characterization of Pure and Doped Poly (Vinyl Alcohol) (PVA) Polymer Electrolyte Films

A sodium ion conducting polymer electrolyte based on Poly (Vinyl Alcohol) (PVA) complexed with Sodium Iodide (NaI) was prepared using solution cast technique. The structural properties of composite PVA polymer electrolyte films were examined by XRD. The XRD results revealed that the amorphous domains of PVA polymer matrix increased in size with the increase of NaI salt concentration. The variation in film morphology was examined by scanning electron microscopy. FT-IR spectra studies for pure PVA and complexed films revealed the vibrational changes that occurred due to the effect of dopant salt in the polymer. DC conductivity was measured in the temperature range of 303–373° K and the conductivity was found to increase with the increase of dopant concentration as well as temperature. Optical absorption studies were made in the wavelength range 200–600 nm. The absorption edge, direct band gap, and indirect band gap values were evaluated.     

溶胶-凝胶法制备ZAO薄膜及其结构与光学性能分析

以Zn（CH3COO）2·2H2O和Al（NO3）3·9H2O为主要原料,采用溶胶一凝胶法结合旋涂工艺以ITO玻璃为衬底制备获得掺Al型氧化锌透明导电薄膜（Zn2Al0.6O）。分别采用XRD和分光光度计测试分析了所制各薄膜的结构和透射光谱,并计算了薄膜的平均晶粒尺寸和光学带隙。结果表明,所制备薄膜为ZAO薄膜：薄膜平...     

镉苯并咪唑二乙酸配合物的合成、晶体结构和热性能研究

1,3-苯并咪唑二乙酸与镉离子的反应,采用溶液法得到结构新颖的配合物:{[Cd3(η2-L-μ2-η2)2(4,4'-bipy)2(SO4)2(H2O)4]·5H2O}n。通过元素分析、红外光谱、热稳定性对配合物进行了初步表征,且通过单晶X-ray衍射对其晶体结构进行了测定。     

结晶紫-硼酸复配物的固相合成及其热变色性能

采用固相法合成了结晶紫-硼酸系列可逆热致变色颜料。研究结果表明,m(结晶紫)∶m(硼酸)=1∶(200～600),研制的颜料在60～65℃时由紫红色开始变为蓝色,加热到95～100℃时变为黄色,冷却时恢复为紫红色,复色时间小于3min。重复进行20次实验,颜料的色泽、变色温度和复色时间保持不变。还研究了MgO、Al2O3、硅藻土、硅胶、CaCO3等无机填料对颜料变色性能的影响,结果表明:以Al2O3和硅胶为填料,m(结晶紫)∶m(硼酸)∶m(填料)=1∶200∶(100～200),颜料的两个变色温度降低到56℃和85℃,复色时间为105s。DSC检测颜料的热变色过程得出:该系列变色颜料在40～60℃、100～130℃、130～150℃出现3个吸热峰。     

几种提高分辨率处理方法的探析

油气勘探的目标已经从简单型转向复杂型,从构造油气藏转向隐蔽性油气藏,地震数据处理技术越来越重要,提高地震资料的分辨率是一项至关重要的环节。本文从高分辨率地震勘探原理出发,分析了影响分辨率的几个主要因素,列举了在两种提高分辨率的处理方法取得了较好的效果．经处理后信噪比和分辨率都得到提高。     

物探勘察在复杂滑坡勘察中的应用研究

本文通过引用综合物探方法在梅河高速公路17标边坡滑坡治理中的工程实例,论述了综合物探方法在滑坡调查与治理时的应用效果和应用前景。对调查滑坡性状参数,特别是滑坡面的确定提出了实际有效的方法。     

Revisitation of Formaldehyde Aniline Condensation. I High Yield Synthesis of 1,3,5-Triphenylhexahydro-symtriazine and its X-Ray Crystal Structure Determination

A rapid and efficient preparation of 1,3,5-triphenylhexahydro-sym-triazine ( 10 ) using paraformaldehyde is reported. The trimeric nature of the compound and its structure in solid state, where a biaxial chair conformation is favoured, are conclusively shown by X-ray diffraction analysis. A recent report on a preparation of 1,3-diphenyl-1,3-diazetidine is invalidated.