微波合成掺锶羟基磷灰石

以SrCl2、Ca(NO3)2和(NH4)2HPO4为原料,采用微波法合成了掺锶羟基磷灰石。对制备的SrHAP进行元素含量分析,采用XRD对其结构进行了表征,并测定粉体产物的粒度。研究结果表明:采用微波法可以制备出元素组成接近原料计算化学计量比的掺锶羟基磷灰石;采用微波法可以快速得到结晶性好的SrHAP;掺锶量对微波合成的SrHAP的结构有显著影响;微波法比常规方法制备出的SrHAP粉体的粒度小。     

一步法合成紫外线吸收剂N,N''''-二芳基甲脒

以4-氨基苯甲酸乙酯、原甲酸三甲酯和N-甲基苯胺为起始原料在冰乙酸的催化下一步反应合成了紫外线吸收剂N-(4-乙氧羰基苯基)-N-甲基-N-苯基甲脒,收率93.3%.工艺过程简单,有良好的工业化应用前景.     

二(三氯甲基)碳酸酯"一锅法"合成取代脲类除草剂

用二(三氯甲基)碳酸酯(BTC)代替光气,"一锅法"合成了8种取代脲类除草剂,产物结构经元素分析、IR确证.收率为92 %,纯度为97.5 %～98.7 %.     

Synthesis and characterization of a new iridium(III) complex with bulky trimethylsilylxylene and applications for efficient yellow-green emitting phosphorescent organic light emitting diodes

We designed and synthesized a new iridium(III) complex with phenylpyridine ligands containing a bulky trimethylsilylxylene, 5-(2,5-dimethyl-4-(trimethylsilyl)phenyl)-2-phenylpyridine, by Suzuki coupling reaction and characterized using various spectroscopic studies. Nuclear magnetic resonance studies show its structure to be that of a facial isomer. Thermogravimetric analysis and differential scanning calorimetry studies show its higher thermal stability (?T_5%) of 638 K with a glass transition temperature of 425 K. It shows the photoluminescence emission at 532 nm in solution with the band gap energy of 2.56 eV. The new iridium(III) complex as dopant in phosphorescent organic light emitting diodes exhibits the yellow-green emission at 532 nm as it effectively hinders aggregation formation in the solid state at a dopant concentration of 6%, resulting in higher device efficiencies of 12.7% and 45.7 cd/A. The results show that the new iridium complex could be useful in white organic light emitting diodes for the lighting applications.     

取代芳基磷酸金属盐类成核剂对聚乳酸结晶的影响

通过示差扫描量热仪（DSC）和偏光显微镜（POM）考察了取代芳基磷酸金属盐类成核剂对聚乳酸结晶行为的影响。结果表明：取代芳基磷酸一价盐和三价盐可以较好的改善聚乳酸的结晶，其中取代芳基磷酸锂盐的效果最好，使结晶温度提高了4℃。取代芳基磷酸二价盐对于聚乳酸结晶的改善并不明显。对取代芳基磷酸金属盐类成核剂浓度效应的研究发现：1％为其在聚乳酸中的饱和添加浓度。针对滑石粉和取代芳基磷酸锂盐进行了复配研究，发现复配后的成核剂可以更好的促进聚乳酸的结晶。     

腐植酸类农药的发展前景

介绍了腐植酸作为农药、农药的载体、农药的增效剂所具有的功能和作用,以及腐植酸作为一种天然化合物在未来农业持续发展中的环保作用。     

2-甲基-5-取代苯硫基-1,3,4-噻二唑的合成研究

以取代碘苯和2-巯基-5-甲基-1,3,4-噻二唑为原料,合成了一系列2-甲基-5-取代苯硫基-1,3,4-噻二唑类化合物,确定最佳合成条件为:以碘化亚铜作催化剂、2-吡啶甲酸作配体,于70～80℃在二甲基亚砜中反应24～36h。目标化合物结构经核磁共振氢谱、核磁共振碳谱、红外光谱、质谱分析确证。     

Photo-oxidative coupling polymerization of methoxy acetonitrile and thermal behavior of the polymer obtained

Photo-oxidative coupling polymerization of methoxy acetonitrile was carried out by using organic peroxide as an oxidizing agent under UV light irradiation at ambient temperature. The acetonitrile gave a homopolymer with a molecular weight of about 1000-1600 in moderate yield. ¹H-NMR and ESR spectra demonstrated the production of the polymer with the structure of 1,1-disubstituted polymethylene through a methoxycyanomethyl radical intermediate. It was also found that the polymer easily produced unpaired electrons in the structure only by heating and it initiated the polymerization of methyl methacrylate above 70°C. In addition, the acetonitrile also afforded a copolymer with diphenylmethane by the coupling polymerization.     

Liquid phase oxidation of substituted toluenes by air for the production of pharmaceutical intermediates

Liquid phase oxidation of several substituted methyl aromatic compounds by air in an acetic acid medium, using cobalt acetate as a catalyst and sodium bromide or paraldehyde as a promoter, has been investigated with a view to developing manufacturing processes for the production of various pharmaceutical intermediates. In most cases carboxylic acids and aldehydes were the major products of oxidation. The process parameters such as temperature, period of reaction, and concentrations of the substrate, catalyst and promoter were chosen to obtain a high proportion of the desired oxidation product.