聚碳硅烷纤维的空气不熔化处理

用热重和红外光谱分析了聚碳硅烷纤维在空气中的不熔化处理过程, 确定了不熔化处理的反应机理和反应条件。通过控制不熔化处理程度, 有效地改善了碳化硅纤维的力学性能。     

不饱和烃的理化性质与分子拓扑指数的关系研究

定义并分别求算了不饱和烃(烯烃、炔烃、烷基苯)的价键连通性指数和价键信息拓扑指数, 将拓扑指数分别与这些物质的标准生成热、标准熵、标准生成自由能等一系列理化性质相关联, 用计算机回归方法确定了不同性质的最佳函数形式。回归的复相关系数和重新计算的误差结果显示拓扑指数与理化性质具有优良的相关性。     

INFLUENCE OF BACKBONE RIGIDITY ON THE LIQUID CRYSTALLINITY OF MESOGEN-CONTAINING POLYACETYLENES

Two acetylene polymers containing cyanobiphenyl-based mesogens,poly { 10-[ ((4'- cyano-4-biphenylyl ) oxy ) carbonyl] - 1 -decyne } (PA8CN ), which has a relativelyfiexible polyalkyne backbone, and poly {[4-(((12-((4'-cyano-4-biphenylyl)oxy)dodecyl)oxy)carbonyl) phenyl]-acetylene} (PB12CN), which has a fairly rigid poly (phenylacetylene )backbone, were synthesized using respectively WCl_6 and [Rh(nbd)Cl]_2 as the catalysts.PA8CN exhibits enantiotropic interdigitated smectic A phase (S_(Ad)) over a temperaturerange as wide as ca. 100℃, whereas PB12CN is non-mesomorphic, demonstrating thatthe backbone rigidity plays an important role in determining the liquid crystallinity of thepolyacetylenes.     

Preparation of thin SnO2 layers by inorganic sol-gel process

SnO₂ sols were prepared in the following way: (1) precipitation of metastannic acid with aqueous ammonia from aqueous solutions of SnCl₄, (2) washing the precipitates with NH₄NO₃ solution and water, (3) peptization of precipitates in water, sometimes with an addition of HNO₃, at elevated temperature using mechanical stirring. In those sols, sometimes diluted with water or ethanol, substrates (glass or silica derived wafers) were dipped and withdrawn at various rates. Gel coatings were converted into crystalline SnO₂ by thermal treatment at 600°C. Coatings with thickness between 300–2000 Å were prepared.     

天麻化学成分的研究

天麻的石油醚和70%乙醇提取部分经硅胶柱层析,分得八个成分(Ⅰ～Ⅷ)。Ⅶ[C₁₃H₁₈O₇,熔点145～148℃[α]_D¹⁵-66.4°,(C.0.65,水)]为天麻主要成分,根据光谱分析、衍生物制备和苦杏仁酶水解产物的鉴定,确定其结构为对羟甲基苯β-D-吡喃葡葡糖苷,命名为天麻苷。其余七个化合物分别鉴定为天麻苷元——对羟基苯甲醇(Ⅲ)、β-谷甾醇(Ⅱ)及其D-葡葡糖苷即胡萝卜苷(Ⅵ)、柠檬酸(Ⅴ)及其单甲酯(Ⅳ)以及棕榈酸(Ⅰ)和蔗糖(Ⅷ)。     

铽(Ⅲ)、铕(Ⅲ)-1-环丙基-6-氟-7(1-哌嗪基)1、4-二氢-4-氧喹啉-3-羧酸-乙酰丙酮三元固体荧光配合物的合成与光谱表征

Two ternary solid complexes， Tb³⁺ (Eu³⁺)-ciprofloxacina-acetylacetone， have been synthesied and chara-cterized by elemental analysis， IR. Ciprofloxacina is one kind of bacteriophage containing α-carbonyl carboxylic acid configurayion and acetylacetone contains β-diketonate configurayion. They are the ideal ligands for Tb³⁺ and Eu³⁺. The fluorescence spectra of Tb³⁺ and Eu³⁺ complexes showed that the ligands were suitable for efficient energy transfer from ligands to the Tb³⁺ or Eu³⁺ ion with a high fluorescence quantum yield， large stoke shift， narrow emission bonds and large fluorescence lifetime. So the complexes were the new kind of solid fluorescence materials. Moreover， the mechanisms of the fluorescence of Tb³⁺ (Eu³⁺)-ciprofloxacina-acetylacetone ternary solid complex were investigated.     

合成3,3''''-二吲哚基苯基甲烷的新方法

以无水乙醚为溶剂,室温下无水三氯化铝催化N-(2-氯乙基)苯甲醛亚胺与吲哚反应,合成了3,3'-二吲哚基苯基甲烷和6,12-二苯基吲哚[2,3-b]咔唑,其结构经1H NMR,IR和MS表征.     

过氧化氢在乙酸均相体系中对壳聚糖的降解

为制备分子量较低的可溶于水的壳低聚糖,研究了在乙酸均相体系中过氧化氢氧化降解壳聚糖的过程,采用凝胶渗透色谱法跟踪测定了壳聚糖氧化降解过程中分子量及其分布的变化,探索制备不同分子量壳低聚糖的适宜条件。     

4(3H)-喹唑啉酮芳胺衍生物的合成及其抗肿瘤活性评价

根据非经典抗叶酸剂的结构特点,将抗肿瘤药效团三甲氧基苯基与4(3H)-喹唑啉酮结构相结合,设计了一系列具有芳胺侧链的4(3H)-喹唑啉酮衍生物。使用适量的卤代烷,在室温下对3．4,5-三甲氧基苯胺进行N-烷基化反应,制得了4种N-取代的3,4,5-三甲氧基苯胺,收率为30．3％～60．6％。将2-甲基-6-溴甲基-4(3H)-喹唑啉酮与3,4,5-三甲氧基苯胺、N-取代的3,4．5-三甲氧基苯胺以及其它芳胺在室温下反应,以30．8％～71．9％的收率合成了目标化合物8a～8m,其结构用ESI-MS、~1H NMR、元素分析或HRMS测试技术进行了表征。采用MTF法测试了化合物8a～8m对人非小细胞肺癌A-549、结肠癌HCT-8和肝癌Bel-7402细胞的体外抗肿瘤活性。结果表明,在5×10~(-6)g/mL质量浓度下所合成的化合物对3种肿瘤细胞的体外生长的抑制率均低于25％。     

纳米复合材料CoFe2O4/SiO2的制备和表征

采用溶胶-凝胶法制备了(CoFe2O4)x/(SiO2)1-x纳米复合材料. 利用TG/DTA, XRD和Mssbauer效应研究了热处理过程中干凝胶的变化及样品的结构、晶粒尺寸和磁性. 结果表明, 随着SiO2含量的增加, 样品中CoFe2O4的晶粒尺寸和内磁场逐渐变小, 并从磁有序状态转变为超顺磁状态.