Controlled/“Living “Radical Polymerization of(-)-Menthyl Methacrylate

The atom transfer radical polymerization(ARP)of (-)-menthyl methacrylatc((-)-MnMA) mediated by CuCl/bipyridine and ethy1 2-bromopropionate or 1-phenylethyl bromide in THF system has been studied.The dependence of the specific rotation on molecular weight and the CD of Poly((-)-MnMA) thus obatined was investigated.     

铟锡氧化物纳米网的微波法制备及其光催化特性研究

By using ultrasonic and chemical liquid coprecipitation, the precursor was prepared with high purity In, SnCl₄·5H₂O and urea. The In₂O₃·SnO₂ nanonets were obtained from precursor by heating in microwave oven. The powders were characterized by XRD, TEM. The analyzed results show the sample is In₂O₃·SnO₂, and In₂O₃is rhombohedral system while SnO₂ is tetragonal system. The sample is in spherical grain shape, with average granularity of 35 nm, and the mesh diameter of 10～80 nm. The sample was with fluorescence and good photocatalytic performance for degradation of organic dyestuff.     

New Facile Synthesis of 2-Aryloxy-5-(2-furfurylidene)- 4H-imidazolin-4-ones

Many N-heterocycles including 4H-imidazolin-4-ones exhibit biological activities1-3. Some derivatives of 5-(2-furfurylidene)-4H-imidazolin-4-one were found to show good antiinflammatory activity4. They can be synthesized by condensation of furfural with 5- unsubsituted 4H-imidazolin-4-ones or from corresponding oxazolones5,6. However, no synthesis of 2-aryloxy substituted 5-(2-furfurylidene)-4H-imidazolin-4-one was reported. Recently, aza-Wittig reaction has received increased attention …     

含氟丙烯酸酯共聚乳液及其膜表面特性的研究

以十二烷基硫酸钠 (SDS)和OP 10混合乳化剂 ,制备了甲基丙烯酸全氟辛基乙酯 (FMA8) 甲基丙烯酸丁酯 (BMA) 甲基丙烯酸 (MAA)共聚乳液 .通过DSC、FT IR、1 H NMR对共聚物的结构、组成进行了表征研究 .采用JZHY 180界面张力仪研究了共聚乳液膜表面的性质 ,结果表明 ,随着共聚物中全氟单体含量的增加 ,共聚物膜的表面能显著降低 ,当全氟单体的含量达到 2 5wt %时 ,其表面能降低到 19 74mJ m2 .X ray光电子能谱(XPS)对共聚物表面原子组成的分析结果表明 ,共聚物表面氟的含量远高于其平均含量 ,证明了含氟基团的趋表现象 .经退火处理 ,共聚物膜表面的氟含量增加 ,表面自由能降低     

THE SYNTHESES OF POLYQUINOLINES WITH 2,2''''-PYRIDYLQUINOLINE AND 2,6-DIQUINOLYLPYRIDINE AS LIGAND AND THEIR APPLICATIONS IN SOME CATALYTIC REACTIONS

The polyquinolines with 2,2'-pyridylquinoline as bidentate and 2,6-diquinolylpyridine as tridentate ligand have been prepared from 4,4-dlamino- 3,3'-dibenzoyldiphenyl ether, 4,4'-diacetyldiphenyl ether and 1,4-bis (2-acetylpyridyl-6-oxy) benzene, 2,6-diacetylpyridine, respectively. These polyquinoline-supported ligands have been used in hydrogenation and hydroformylation of olefins with some transition metal complexes.     

高效液相色谱直接分离μ-FcCCHCoW(CO)5(CpCOOC2H5)簇合物对映体

将三（苯基氨基甲酸）支链淀粉酯涂敷在硅胶上制成了手性固定相．将支链淀粉与过量的苯异氰酸酯在吡啶中反应得到的苯基氨基甲酸酯溶解并涂敷在用３－氨基丙基三乙氧基硅烷处理过的硅胶上，涂敷量为０．４５／２．５５（重量比）．用此手性固定相拆分了外消旋的簇合物μ－ＦｃＣＣＨＣｏＷ（ＣＯ）５（ＣｐＣＯＯＣ２Ｈ５）．拆分在室温下进行，洗脱液为甲醇，流速为０．５ｍＬ／ｍｉｎ．     

雪松烯的硼氢化反应及其产物构型的测定

(-)-α-雪松烯是由天然雪松醇制得, 它与硼烷反应得到二异雪松基硼烷. 其红外光谱显示是二聚体. 在用H~2O~2/NaOH氧化之后, 得到异雪松醇, 其绝对构型由X-ray结构分析得到确定. 根据这一结果, 硼氢化的立体化学和二异雪松基硼烷的构型得到确定.     

Studies on Artificial Imitation of Glutathione Peroxidase by Chemical Mutation

ＳｔｕｄｉｅｓｏｎＡｒｔｉｆｉｃｉａｌＩｍｉｔａｔｉｏｎｏｆＧｌｕｔａｔｈｉｏｎｅＰｅｒｏｘｉｄａｓｅｂｙＣｈｅｍｉｃａｌＭｕｔａｔｉｏｎＤＩＮＧＬａｎ；ＺＨＵＺｈｅｎ－ｑｉ；ＬＵＯＧｕｉ－ｍｉｎ；ＳＵＮＱｉ－ａｎ；ＹＡＮＧＴｏｎｇ－ｓｈｕａｎｄＳＨ...     

催化光度法测定痕量甲醛

基于磷酸介质中甲醛催化溴酸钾氧化溴甲酚紫的褪色反应 ,建立了测定痕量甲醛的方法。方法的检出限为 1.0× 10 - 5g·L- 1,线性范围为 0 .0 2 0～ 0 .4 8μg·ml- 1,方法简便 ,用于空气中测定痕量甲醛 ,结果满意。     

新试剂N-苯基-N′-(氨基对苯磺酸钠)硫脲的合成及其在微量金(Ⅲ)测定中的应用

介绍了新试剂N 苯基 N′ (氨基对苯磺酸钠 )硫脲 (PPT)的合成方法。并研究了与金的显色条件 ,建立了光度法测定微量金的新方法。在pH 5 .0～ 5 8的HAc NaAc缓冲体系中 ,在溴化十六烷基三甲胺 (CTMAB)存在下 ,Au(Ⅲ )与PPT形成组成比 1∶3的黄色水溶性络合物 ,其最大吸收峰位于 31 7.0nm ,表观摩尔吸光系数ε=3.68× 1 0 4 L/mol·cm ,Au(Ⅲ )含量在 0～ 80 μg/2 5mL范围内服从比尔定律。