磷系水质稳定剂的合成和应用

介绍了国内外磷系水质稳定剂的现状和发展，重点讨论了作为水质稳定剂的聚磷酸钠、有机多元膦酸、膦羧酸以及磷酸酯的合成和应用。     

高效液相色谱法分析四-(2-氯乙基)乙撑二磷酸酯阻燃剂

提出了阻燃剂的高效液相色谱(HPLC)分析条件,制备了纯组分,测定了校正因子,考察了方法的精密度和回收率。分析结果表明该合成产品已达到国外同类产品水平。     

铁石墨层间化合物合成工艺及机理研究

作者以钾金属为还原剂与Ｆｅｃｌ３－ＧＩＣ反应，合成了铁石墨层间化合物，同时对反应的机理进行了初步探讨。     

烟酰胺（维生素B3）的美白应用

一个美白肌肤的配方，包含：烟酰胺或者其前供体，防晒剂4-叔丁基-4’-甲氧基-二苯甲基甲烷，2-乙基己基甲氧基酰胺或者他们的复配物，以及硅酮化合物。硅酮化合物可以是二甲基聚硅氧烷。     

一种新型有机锗化合物的合成及其抗癌性

癌症是当今人类疾病中的第一杀手,寻找新的药物预防和医治癌症是21世纪有机化学的重要研究课题之一。本文报道了一种新型有机锗化合物的合成,它对肺腺癌细胞生长抑制率达88%。     

Influence of Lanthanum on Fluorescence Properties of Ag-BaO Thin Films

Ag-BaO thin films doped with lanthanum were prepared by vacuum deposition. Compared with the normal Ag-BaO thin film, there is almost no change with the shape and the peak site of the fluorescence spectrum; however, fluores-cence emission strength of the whole observation band(325 -600 nm)increases about 40%, and the increase of short wavelength range is more remarkable than that of long wavelength range, which we named “blue-stronger“ phenomenon. Analytic results show that, with the forming of intermetallic compounds between silver and lanthanum, the 4f-state energy levels lie just below the Fermi level within 5 eV. It is the energy exchange between the 4f energy levels and the conduction band that causes the increase effect of fluorescence emission, and it is the optical absorption cross section of 4f electron, which increases with the increase of energy of incidence photon, that gives rise to the “blue-stronger“ phenomenon.     

MOCVD工艺中使用的特种气体

一、引言 金属有机化学气相淀积法(简称MOCVD法)是1968年由H.M.Manasevit等首先提出的。该法以挥发性金属有机物和气态的非金属氢化物作为源材料，采用与硅外延淀积相类似的生长装置，进行化合物半导体的外延淀积。