1,6-二氢-S-四嗪催化重排及其反应的研究--Ⅱ. 与氯甲酸三氯甲酯反应

在4－二甲胺基吡啶的存在下，1，6－二氢－S－四嗪重排成3，6－二氢－S－四嗪，与双光气反应后再与不同的胺反应，合成了11种1，4－二取代产物，产物经元素分析、IR和^1H NMR确证。用UV和^1H NMR分析结果对反应机理进行了初步探讨。     

2-苯基-4,5-二(2''''-吡啶基)咪唑的合成

以苯甲醛和1,2-(2'-吡啶基)-乙二酮为原料,用德布斯法合成了未见报道的2-苯基-4,5-二(2'-吡啶基)咪唑,收率31%,其结构经1H NMR, IR和MS表征.     

3D Supramolecular Network Based on Hydrogen Bonds Between 1D [ Ni（μ2-C2O4） （ Him）2] Zigzag Chains

Introduction In recent years,considerable attention has been paid to supramolecular networks based on metal organic building blocks because of their potential applications in diverse fields,such as,catalysis,optics,sensors, magnetism,and molecular recognition[1-3].On the ba-     

丙烯在ZSM-5沸石上齐聚反应的研究 Ⅰ. 模板剂用量对丙烯齐聚反应的影响

考察了不同正丁胺（NBA）模板剂用量合成ZSM-5沸石的物化特性和催化性能。采用XRD、SEM、NH3-TPD和BET等手段对合成样品的物化特性进行了表征。结果表明，模板剂与SiO2摩尔比在0.67～0.22时合成的ZSM-5沸石结晶度高于90%；随着模板剂用量的减少，ZSM-5沸石的平均粒径减小，强酸量也存在相同的趋势。丙烯齐聚反应评价结果显示,模板剂用量对合成ZSM-5沸石的催化活性有显著影响，模板剂与SiO2摩尔比在0.67～0.45之间合成的沸石催化性能较好。     

CdSe纳米线阵列的制备及其表征(英)

通过在含有SeSO₃^2-和Cd²⁺的室温水溶液中，用模板-电沉积法在纳米孔阵列阳极氧化铝膜(AAM)模板中制备了高有序性的CdSe纳米线阵列，并对其形貌、结构和组分进行了表征。扫描电子显微镜(SEM)和透射电子显微镜(TEM)结果表明，纳米线阵列中的CdSe纳米线具有相同的长度和直径，分别对应于使用的AAM模板的厚度和孔径；X-射线衍射(XRD)和X-射线能谱(EDAX)结果表明，CdSe纳米线中Cd和Se的化学组成非常接近于1∶1，其结构为立方CdSe。另外，对模板-电沉积法制备CdSe纳米线的机理进行了讨论。     

Preparation of Micron-size Functional Fluorescent Microspheres

As a kind of special functional microspheres, fluorescent polymer microspheres could be used in cell label and separation, blood flow assay, flow cytometer marking, chemical reaction assay,and in analyst of the transform and diffusion of particles in soil 1. However, one of the most important applications of fluorescent microspheres is in the high-throughput screening of drugs (HTS) 2. Through affinity interaction, radioactive ligands (latent drugs) are bound to fluorescent microspheres covered by receptor, and luminescence is produced by radioactivity, so ligands can be assayed and screened.In this study, we developed a technique for preparing micron-size fluorescent microspheres with different functional groups. The methods included the synthesis of micron-size polystyrene microspheres through the dispersion polymerization of styrene in different media such as ethanol,ethanol-water, and isopropanol; the functional polystyrene microspheres were prepared by introduction of functional monomers into the reaction system of styrene; the functional fluorescent microspheres were obtained by the way of dying functional microspheres in the fluorescent material's ethanol solvent.The average diameter of microspheres was in the range of 1～10 μm, and the distribution was normal distribution. The functional groups included -OH, -CHO, -COOH, -CONH2, and SO3H. The absorbing spectrum and exciting spectrum were tested, the results showed that the maximal absorbance of fluorescent microsphere was near 306.5 nm, and its maximal excitation was near 362 nm. The excitation spectrum of fluorescent material (DPO) and fluorescent microspheres were shown in figure 1, and it indicated that the developed fluorescent microspheres showed the same excitation behavior like DPO, which related to the fluorescent microspheres had stable luminescence property.     

胶束溶液中高氯酸二水(四胺)合钴(Ⅲ)配合物催化磷酸二酯水解的研究

本文合成了疏水性高氯酸二水（四胺）合钴（Ⅲ）配合物，研究了它与非离子表面活性剂Brij35形成的金属2胶束催化二（对硝基苯酚）磷酸二酯水解的动力学及其机理。结果表明此金属胶束对磷酸二酯水解的速率大约提高10^4倍，这主要是由于表面活性剂胶束的pH效应和浓聚效应所致，暗示着顺式二水类配合物形成的金属胶束是一个潜在的磷酸二酯水解剪切的催化剂。     

4-[2-(4,6-二甲氧基-2-嘧啶氧基)苄胺基]苯甲酸正丙酯的合成和晶体结构

2-甲砜基-4,6二甲氧基嘧啶和N-(4-丙氧羰基苯基)-2-羟基苄胺在四氢呋喃溶液中反应, 生成标题化合物4-[2-(4,6-二甲氧基-2-嘧啶氧基)苄胺基]苯甲酸正丙酯,并测定了其晶体结构。该化合物分子式为C23H25N3O5,晶体属单斜晶系,空间群为P2/n,晶胞参数为a = 14.8504(8),b = 9.4420(4),c = 16.3129(9) 牛 = 104.881(1)埃琕 = 2210.6(2) 3,Z = 4,Dc = 1.272 g/cm3,F(000) = 896.00,(MoK? = 0.91 cm-1,R = 0.051,wR = 0.118,获得19761衍射数据,其中独立衍射点5004个。经元素分析、IR、MS和HNMR等对化合物的结构进行了表征。在分子结构中,各有3个不同的共轭平面。嘧啶环和苯环(C(7) C(12)),及苯环(C(14) C(19))的夹角分别为99.18 , 164.15埃?个苯环之间的夹角为94.93啊;衔锍世啻焦瓜蟆?     

聚乙烯与聚乙烯-乙丙橡胶(聚乙烯-乙丙橡胶-聚乙烯)共混物X-射线衍射谱分析

近年来将因子分析这一多变量统计分析技术成功地用于具有加和性的谱分析中。因子分析法可正确定出混合物中含有的物种(因子)数和各物种的含量(浓度),同时可将各组分的纯光谱由混合物的光谱中分离开。聚乙烯(PE)和乙丙橡胶(EPR)的二、三元嵌段共聚物(PE-EPR、PE-EPR-PE)构成的共混物结构、形态与结晶过程研究已有     

α－芳甲酰基烯酮二硫缩醛的新合成方法

以碳酸钾为碱，芳甲酰丙酮（１）与二硫化碳、卤代烃反应得到２－乙酰基－２－芳甲酰基烯酮硫代缩醛（２），２在乙硫醇钾作用下脱乙酰基生成标题化合物（３）。１→３的转化具有反应条件温和、产物产率高及对３中各种缩醛基均可通用等特点。