含双键侧基的聚氧乙烯与苯乙烯的接枝共聚物及其产物的性质

由环氧乙烷及烯丙基缩水甘油醚合成含双键侧基的聚氧乙烯用苯乙烯接枝共聚,接枝效率可达50％左右.接枝产物经纯化,用IR及~1H NMR表征.该产物与LiClO_4的络合物有较高的室温导电率,其PEO含量在70％及EO/Li=20/1时,25℃的导电率接近10~(-4)S/cm.此外,该接枝共聚物有较高的乳化能力.在Williamson固液反应中具有良好的相转移催化作用.     

偶氮氯膦mk催化动力学光度法测定痕量铱(Ⅳ)

实验发现,在硫酸介质中,Ir(Ⅳ)对KBrO3氧化偶氮氯膦mk的反应具有催化作用,据此建立了测定痕量铱(Ⅳ)的催化光度法。方法测定铱(Ⅳ)的线性范围为0.2~1.2μg/25mL,检出限为6.88×10-10g/mL。拟定的方法已用于冶金产品和岩矿中痕量铱(Ⅳ)的测定,分析结果满意。     

{[Gd(DMF)_3(DMSO)(H_2O)_3](μ-CN)[Fe(CN)_5]}·2H_2O的合成,结构表征和磁性(英文)

0IntroductionThefirstmolecule鄄basedmagnetswerereportedin1986[1].Duringthelasttwodecades,moreandmoreattentionhasbeenpaidtothesynthesisofmolecule鄄basedmagnets,especiallytoPrussianBlueanalogu鄄es[2].TheoldPrussianBlueanalogueshavebeenbroughtuptodateduetoth…     

新型氮芥和卤代烷基哌嗪芳香醛的合成

通过对Vilsmeier反应、烷基化反应和氯化反应的改进提出了以简单易得的苯胺和苯基哌嗪为原料制备氮芥和哌嗪芳香醛的方法. 采用该改进的方法合成了8个氮芥和哌嗪芳香醛, 其中7个为新化合物. 它们的结构均经质谱、红外光谱、核磁共振谱和元素分析确证.     

哌嗪取代卟啉的合成、表征及其抗癌活性

设计并合成了6个具有抗癌活性的哌嗪取代卟啉化合物,分别为5,10,15,20-四[4-(4'-乙基哌嗪基)苯基]卟啉(TEPPH2,8a),5,10,15,20-四[4-(4'-丁基哌嗪基)苯基]卟啉(TBPPH2,8b),5,10,15,20-四[4-(4'-庚基哌嗪基)苯基]卟啉(THPPH2,8c),5,10,15,20-四[4-(4'-苯基哌嗪基)苯基]卟啉(TPhPPH2,8d),5-[4-(4'-乙基哌嗪基)苯基]-10,15,20-三苯基卟啉(EPTPPH2,8e)和5-[4-(4'-丁基哌嗪基)苯基]-10,15,20-三苯基卟啉(BPTPPH2,8f).这些卟啉化合物都由取代苯甲醛与吡咯缩合而成,每一个卟啉分子中含有一个或四个具有抗癌活性的取代哌嗪结构,结构经元素分析,MS,1H NMR,IR和UV-vis等表征.初步的生物活性研究表明,这些化合物具有一定的抗癌活性,因而在医学上可能具有潜在应用前景.     

[Co(amp)2Cl2]2[ZnCl4]体系中两对称异构体的2D NMR研究

The two symmetrical isomers in [Co(amp)₂Cl₂]₂[ZnCl₄](amp=2-(Aminomethyl)pyridine) system were syn-thesized by general oxidation method and were separated by chromatography and recrystallization method. Their configurations were assigned by using 2D NMR techniques, particularly the NOESY NMR spectra. Solvent used was Me₂SO-d₆ with the central peak of the CD₃ septet as the reference ( ₁₃C,δ 39.37; ₁H,δ 2.49 relative to SiMe₄). Cation exchange media used was Dowex 50Wx 2(H⁺ form, 200～400mesh; Biorad).     

SYNTHESIS, CROSSLINKING MECHANISM AND PROPERTIES OF A POLYACRYLATE/POLYURETHANE COMPOSITE COATING

A polyacrylate/polyurethane (P(A) / P(U)) composite coating has been prepared bycrosslinking an acetoacetylated polyacrylate with a vinylic group terminated polyurethaneat room temperature. A model Michael reaction between ethyl acetoacetate (EAA) andmethyl acrylate (MA) was designed to study the crosslinking mechanism. It was foundthat the two active hydrogen atoms in acetoacetyl group can both add to vinylic groupsand the yield of mono- and bis-adducts are much affected by the molar ratio of acetoacetylto vinylic groups. Higher crosslinking degree and better properties could be obtained withdecreasing the molar ratio of the two active groups from 1/1 to 0.6/1 in the compositecoatings.     

丙烯酸甲酯-氰尿酸三烯丙酯共聚物的合成及其孔结构的研究Ⅰ.

氰尿酸三烯丙酯(TAC)与丙烯酸甲酯(MA)在致孔剂如环己烷、正丁醚或甲苯-汽油(200~#)存在下,用悬浮聚合得到一系列大孔共聚物。对这些共聚物孔结构的研究表明,它们的平均孔径达10000—80000(?),同时研完了致孔剂的分子结构和用量对共聚物孔结构的影响,并初步讨论特大孔共聚物形成的机理。     

过硫酸盐和N,N,N′,N′-四甲基乙二胺体系引发烯类聚合机理的研究

<正> 过硫酸盐和N,N,N′,N′-四甲基乙二胺(TMEDA)体系用作烯类聚合的引发剂已有报道。本文报道该引发体系的反应机理。1.实验方法     

THE SEPARATION,PURIFICATION AND DECOLORIZATION OF NEW ANTIBIOTICS-MILUPEINAN USING ADSORPTION RESIN

1. INTRODUCTION Fig.1 The Chemical Structure of Milupeinan As a new type of antibiotics Milupeinan, not only possesses antibacterial activities against a wide range of Gram-positive and Gram-negative bacteria, but also higgh stability under th…