BINOL双酰胺绿色催化吲哚与硝基烯烃的 Friedel-Crafts烷基化反应

合成了3种BINOL双酰胺(Ⅰ~Ⅲ)，其结构经¹H NMR, ¹³C NMR, HR-MS(ESI)和元素分析确证。研究了I~III对取代吲哚和硝基烯烃的Friedel-Crafts烷基化反应的催化性能，并对反应条件进行了优化。结果表明：在最优条件(CH₂Cl₂为溶剂，Ⅰ为催化剂，于40 ℃反应12 h)下，吲哚及取代吲哚与硝基烯烃均能有效的进行Friedel-Crafts烷基化反应，收率和ee值最高可达88%和90%。     

三价锰离子引发烯类单体在聚乙烯醇上接枝聚合的研究

<正> 无论是淀粉;纤维素,还是聚乙烯醇(PVA)的接枝反应,Ce(Ⅳ)被认为是一个十分有效的引发剂,已有较详尽的研究。与Ce(Ⅳ)相类似,Mn(Ⅲ)也可以和一些高聚物组成氧化还原引发体系,由此产生自由基,引发烯类单体在高分子主干上进行接枝聚合。Ranby等人,以焦磷酸络合的三价锰离子引发烯类单体在纤维素和淀粉的接枝反应中,获得了高效的接枝产物。有用这种引发体系在淀粉上接枝丙烯腈获得吸水276     

环状碳酸酯低聚物的合成及其开环聚合的研究

环状碳酸酯低聚物的合成及其开环聚合的研究陈雨萍魏玮李革（中国科学院化学研究所工程塑料国家重点实验室北京１０００８０）关键词环状碳酸酯低聚物，聚碳酸酯，开环聚合环状单体的开环聚合在合成高聚物方面具有突出的优点，即在聚合过程中没有副产物、热效应低、聚合...     

N—对甲苯磺酰基—α—氨基膦酸及其单酯的合成及活性研究

用＾３１Ｐ ＮＭＲ谱跟踪反应的方法，研究了对甲苯磺酰胺与取代苯甲醛及三氯化磷（或烷氧基二氯化磷）在乙酰氯为溶剂的条件下的类Ｍａｎｎｉｃｈ反应的机理，找到了合成标题化合物的简单方法。初步生物活性测试表明其中某些化合物具有较好的抗烟草花叶病毒活性。     

垃圾衍生燃料流化床燃烧过程中HCl和NOx的排放研究

在床总高为4040mm的变截面流化床中试规模装置内，研究垃圾衍生燃料(RDF)在气化和燃烧不同阶段中NOx和HCl的生成特性。含NaCl的垃圾衍生燃料在流化床内燃烧，燃烧低于640℃时，Ca(OH)2的脱氯效果比较好;但随着温度升高，烟气中HCl的体积分数迅速增长，但脱氯效果明显受到CaCl2化学反应平衡的限制。燃烧状况特别是氧的体积分数对NOx的生成影响比较大。含氮量高的RDF燃烧产生NOx的体积分数明显高于低含氮燃料所产生的。     

STUDIES ON REGULARITY OF POLY PHENYLSILSESQUIOXANE CHAINS

IR and ~(29)Si NMR were used to determine the structures of ladderlike polymer polyphenylsilsesquioxanes (PPS). It was found that PPS with lots of defects had a wide and strong absorption band in 1000—1400 cm~(-1) with only one sharp peak at 1137 cm~(-1) while two peaks (1130 and 1045 cm~(-1) were observed for PPS with perfect ladderlike structure. Branching and crosslinking of PPS lead to the reduction of 1045 cm~(-1) peak. ~(29)Si NMR spectra, however, showed two peaks (δ=-78 ppm and -87 ppm when δ_(HMDS)=0 ppm) for defective or branched PPS. The -87 ppm peak is related to the ladderlikely constructed Si atoms and -78 ppm corresponds to defective Si atoms. PPS with defects less than 0.1% chain units was obtained by azeotropic polycondensations.     

STUDY ON POLYMER-Ru-Co BIMETALLIC COMPLEXES CATALYSTS Ⅱ.X-RAY PHOTOELECTRON SPECTROSCOPIC ANALYSIS

Polymer Ru-Co bimetallic complexes have been examined by X-ray photoelectron spectroscopy.The catalyst is highly active only when the mole ratio of Co/Ru is 4: 3. The activity of catalysts does not depend on the total Co/Ru ratio, but on the surface stoichiometry of Co and Ru. When the relative intensities of Co_2_p and Ru_(3d) of XPS peaks are close to each other and both are high,the catalyst exhibits its maximum activity The mechanism ofcatalytic hydroformylation has been discussed.     

光导薄膜表面静电荷积累过程的动力学特征

本文对电照相用高分子光导材料薄膜涂层的表面电性能进行了研究,确定了表面充电过程宏观动力学的表征方法、动力学方程以及影响电荷沉积速度的因素。     

Synthesis and Crystal Structure of 7α-[（R）-1-Hy droxyl-1-methyl-3-（ thien-2-yl）-propyl]-6,14-endoethanotetrahydrothebaine

1 INTRODUCTION Opioid analogues still remain important drugs for the relief of severe pain and morphine is still the drug of choice in such situations. For many years, the search for new centrally acting opioid deriva- tives with pain-relieving properties and without un- desired side effects, such as addiction, obstipation, etc., has been the goal of a large number of scien- tists[1-3]. Consequently, a wide variety of modifyca- tions of the well-known alkaloids morphine, codeine and thebai…     

HCF(~1A'''')+SO_2反应的动力学研究

用激光光解-激光诱导荧光方法研究了室温下(T=293K)HCF(X%A′)自由基与SO2分子的反应动力学.实验中1HCF(X%A′)自由基是由213nm激光光解HCFBr2产生的,用激光诱导荧光(LIF)检测HCF(X%A′)自由基的相对浓度随着11反应时间的变化,得到此反应的二级反应速率常数为:k=(1.81±0.15)×10-12cm3?molecule-1?s-1,体系总压为1862Pa.高精度理论计算表明,HCF(X%A′)和SO2分子反应的机理是典型的加成-消除反应.我们运用RRKM-TST理论计算了1此二级反应速率常数的温度效应和压力效应,计算结果和室温下测定的二级反应速率常数符合得较好.