影响SAPO－11分子筛焙烧前后晶胞空间群变化的因素

 从合成参数出发，详细考察了不同因素对SAPO－11分子筛焙烧前后晶胞空间群变化的影响．发现成胶方式、成胶温度、模板剂组成、晶化温度、晶化时间及分子筛产物组成均是影响分子筛晶胞空间群变化的因素．MAS－NMR分析结果表明，分子筛的微观结构决定了分子筛晶胞空间群的变化，Si（4Si）区增加，分子筛保持为Icm2空间群的趋势增强．     

Catalytic Asymmetric[2,3]-Sigmatropic Rearrangement of Sulfur Ylides Generated from Carbenoids and Allenic 2-Methylphenyl Sulfide

The first investigation on catalytic asymmetric [2, 3]-sigmatrop-ic rearrangement of sulfur ylides generated from carbenoids andallenic phenyl sulfide was carried out. Up to 55% ee value wasobtained.     

天然产物Kinsenoside的全合成研究

以5-(R)-[(1R，2S，5R)-孟氧基]-2(5H)-呋喃酮为关键手性合成子，完成了具有抗高血脂活性的天然产物kinsenoside的全合成研究。     

1－十二烷基氮杂环庚烷－2－酮的合成

己内酰胺与溴代十二烷在氢氧化钾的作用下，于甲苯中进行Ｎ－烷基化反应，合成了１－十二烷基氮杂环庚烷－２－酮，收率８８％～９２％。     

酞菁氧钛的合成及晶型转化

酞菁氧钛以联环己烷为溶剂，以邻苯二脂及四氯化钛直接反应生成。其优点是便于分离及纯化。同时对各晶型的获得及晶型间的相互转化进行了研究，并以Ｘ－射线粉末衍射及ＦＴ－ＩＲ进行了表征，并记录了不同晶型的酞菁氧钛在室温硫化硅橡胶中的吸收光谱。     

Yb(C~6Me~6) (AlCl~4)~3·MeC~6H~5 的合成及其晶体结构

合成了一种新的芳烃络合物Yb(C~6Me~6)(AlCl~4)~3·MeC~6H~5 , 并确定了其晶体结构.     

选相原位法合成立方氮化硼的关键影响因素

利用选相原位法在水溶液中成功制备出了立方氮化硼晶体，对反应条件进行了优化。结果表明，利用选相原位法合成立方氮化硼的最佳实验条件是：反应压力为10.0 MPa，在氯离子加入下利用混合氮源进行反应。在该条件下得到了纯相的立方氮化硼晶体。     

Effect of molecular orientation distribution and crystallinity on the measurement of the crystal lattice modulus of nylon 6 by x-ray diffraction

The crystal lattice modulus of nylon 6 (-type) was measured by x-ray diffraction using nylon 6 films drawn up to five times. The measured crystal lattice modulus was 173–175 GPa for all specimens whose crystallinity and the Young's modulus were beyond 46% and 3.75 GPa, respectively. These results indicate that a state of homogenous stress can be achieved. In contrast, the values were scattered for the speciments whose crystallinity and Young's modulus are less than the above values. To study the origin, a numerical calculation of the crystal lattice modulus, as measured by x-ray diffraction, was carried out by considering effects on the orientation factors of molecular chains and crystallinity. In this calculation, a previously introduced model was employed, in which oriented crystalline layers are surrounded by oriented amorphous phases so that the strains of the two phases at the boundary are identical. The theoretical results calculated by the introduced model indicated that the crystal lattice modulus by x-ray diffraction is almost equal to the intrinsic crystal modulus if the morphology of the test specimen can be represented as a series model. In contrast, if a parallel model is more appropriate, the difference between the measured modulus and the intrinsic value can be pronounced. Such morphological dependence was found to be less pronounced with increasing high degree of molecular orientation and crystallinity.     

络合滴定法测定钙含量微型实验研究

利用微型滴定法测定含钙制品中的Ca2 含量,并对微型滴定法与常量滴定法的平行测定结果进行了比较。结果两种方法无显著性差异,F检验t检验结果均在允许范围内,相对偏差均小于2.0%,微型滴定法的精度达到常量滴定法测定水平,能满足化学分析要求。     

Indium-mediated Facile Synthesis of （6-Chloropyridine-3-yl）methyl Heterocyclic Thioether Derivatives in Aqueous Media

A series of substituted (6-chloropyridine-3-yl)methyl heterocyclic thioether derivatives were prepared by indium mediating in water. The preliminary biological tests showed that compound 3d exhibited good antiviral activity.