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1.
制备了钴(Ⅱ)邻菲咯啉,8-羟基喹配合物/Y型分子筛,利用元素分析,TG-DTA、SEM、UV-Vis,BET及XRD等方法确定了分子筛选中金属配合物的生成及其晶体结构,考察了实验参数对苯酚转化率及产物选择性的影响。  相似文献   

2.
本文合成了11种稀土与α-萘乙酸的配合物。元素分析结果表明配合物的组成为RE(C12H9O2)3.2H2O(RE=La,Ce,Pr,Nd,Sm,Eu,Gd,Dy,Er,Yb,Y),并通过配合物的IR,UV,H-NMR,TG-DTA,XPS,磁化率,摩尔电导及溶解性的研究。  相似文献   

3.
魏俊发  俞贤达 《分子催化》1998,12(4):271-278
设计合成了5种新型双核铜配合物,用EA,IR,UV-Vis,XPS,EPR等进行了结构表征,并研究了这些Cu2配合物模拟双核铜单加氧酶多巴胺β-羟化酶催化苯乙烯环氧化反应的特征。结果表明,这些配合物具有两种类型的结构:脱质子型Cu2LOH和非脱质子型「(Cu2H2LX)Y」Y(X=Y=Cl^1-,Br^-;X=OH,Y=O2ClO^-2),两类配合物可相互转化。非脱质子型配合物催化PhIO对苯乙烯  相似文献   

4.
聚乙烯醇与多价态钼配合物的包合物   总被引:3,自引:0,他引:3  
利用PVA既能与12-钼磷酸发生光电子转移反应又具有螺旋状结构的特性,制备了Mo(Ⅵ,Ⅴ,Ⅳ)配合物与带部分羰基PVA的包合物。通过ESR,XPS,DSC,IR,UV-Vis和XRD等分析方法进行鉴定,确证其为包合物。  相似文献   

5.
制备了钴(Ⅱ)邻菲咯啉、8-羟基喹啉配合物/Y型分子筛;利用元素分析、TG-DTA、SEM、UV-Vis、BET及XRD等方法确定了分子筛笼中金属配合物的生成及其晶体结构;考察了实验参数对苯酚转化率及产物选择性的影响。  相似文献   

6.
本文报道首次合成了希土离子RE3+ (RE= Y、La、Nd、Sm 、Eu、Er)与脯氨酸(Pro)、邻菲?啉(Phen)形成的三元固体配合物,对它们进行了元素分析,确定其化学组成为[RE(Pro)3phen]Cl3·2H2O,用摩尔电导、IR·Far-IR、UV、XPS、1H NMR、TG-DTA 分析等研究了配合物的有关性质。  相似文献   

7.
Keggin结构的钨磷钒稀土四元杂多配合物的合成和物化性质   总被引:4,自引:0,他引:4  
合成了9种具有Keggin结构特征的钨磷钒稀土四元杂多配合物,利用化学分析,IR,UV,XPS<ESR,TG-DTA<XRD等手段对配合物进行一表征。  相似文献   

8.
三取代钨硅杂多配合物的导电性和磁性   总被引:5,自引:0,他引:5  
合成了α-NamHn[SiW9M3(H2O)3O37]·16H2O(M=Co(Ⅱ),Ni(Ⅱ),V(Ⅴ)杂多配合物),通过ICP,IR,UV,TG-DTA,XPS,EPR,极谱等手段进行了表征.配合物在室温下的电导率σ值达1×10-3S·cm-1,343K时可达1×10-2S·cm-1,是有实用化前景的新型固体电解质.变温磁化率结果表明α-Na10[SiW9Co3(H2O)3O37]·16H2O和α-Na10[SiW9Ni3(H2O)3O37]·16H2O具有反铁磁性.  相似文献   

9.
制备了铬(Ⅲ)邻菲咯啉、8-羟基喹啉配合物/Y型分子筛,利用元素分析、SEM、UV-Vis、BET及XRD等方法确定了分子筛笼中金属配合物的生成及其晶体结构,考察了实验参数对苯酚转化率及产物选择性的影响。  相似文献   

10.
合成了一系列丁烯酮-丙烯腈共聚物与过渡金属的配位化合物,用X-射线光电子能谱(XPS)的研究了其中存在的配位特征,通过甲醇羰基化反应制备乙酸,乙酸酐的反应,考察了不同催化剂的活性,实验结果表明,在反应中其活性顺序:铑配合物〉镍配合物〉钌配合物〉钴配合物。  相似文献   

11.
A study has been made on the plasma polymerization of acetylene/CO_2/H_2 in a capacitively coupled RF plasma. The monomer mixture yielded a crosslinked film with light brown color. A kinetic study is reported for the plasma polymer ization of acetylene/CO_2/H_2. The effects of discharge power level and reactor geometry on the rate of polymer formation are reported. The structure of the plasma polymer is investigated by IR study.  相似文献   

12.
利用热重研究了两种中国西北典型低阶煤半焦的燃烧特性。探究了不同气氛(O2/CO2、O2/N2和O2/Ar)和不同氧气浓度对其燃烧特性的影响。实验结果表明,无论是反应气氛还是氧气浓度都会对低阶煤半焦的燃烧产生影响。相比于N2和Ar,CO2明显有利于燃烧反应进行:当反应气氛由O2/CO2变为O2/Ar时,两种不同低阶煤半焦的燃尽温度分别升高了63.7和68.8℃;而当反应气氛由O2/CO2变为O2/N2时,两种不同低阶煤半焦的燃尽温度分别升高了135.9和129.6℃。在研究范围内,氧气浓度的提高也能明显提高半焦的燃烧性能。与此同时,半焦燃烧特性的动力学分析表明,随着氧气浓度提高,两种半焦燃烧反应的表观活化能E和指前因子A均呈增大趋势。通过对E和A两者关系的分析结果表明,半焦富氧燃烧的活化能和指前因子存在动力学补偿效应。  相似文献   

13.
The intermolecular potentials for D2, N2, O2, F2 and CO2 are determined on the basis of the second virial coeffincients, the polarizabilities parallel and perpendicular to the molecular axes, and the electric quadrupole moment. The repulsive parts of the potentials are taken from the corresponding Kihara core-potentials. Effects of the octopolar induction are taken into consideration in a unique way. The potential depends on relative orientations of the two molecules as well as the distance r between the molecular centers. This dependence is shown in graphs. A measure of the anisotropy of the potential depth is 0.72 for CO2 0.36 for D2, and smaller than 0.27 for N2 O2 and F2. The remarkable anisotropy for CO2 and D2 is due to strong electrostatic quadrupole interactions.  相似文献   

14.
Phase equilibria in the Ba3(VO4)2-K2Ba(MoO4)2 and Pb3(VO4)2-K2Pb(MoO4)2 systems have been investigated. In the first system, a continuous series of substitutional solid solutions with the palmierite structure is formed, and in the second one, the polymorphic transition in lead orthovanadate at 100°C restricts the extent of the palmierite-type solid solution to 10–100 mol % K2Pb(MoO4)2. Original Russian Text ? V.D. Zhuravlev, Yu.A. Velikodnyi, A.S. Vinogradova-Zhabrova, A.P. Tyutyunnik, V.G. Zubkov, 2008, published in Zhurnal Neorganicheskoi Khimii, 2008, Vol. 53, No. 10, pp. 1746–1748.  相似文献   

15.
MMe5(dmpe) (M = Nb or Ta, dmpe = Me2PCH2CH2PMe2) reacts with H2 (500 atm) and dmpe in THF at 60°C to give MH5(dmpe)2? NbH5(dmpe)2 readily reacts with two mol of CO or ethylene (L) to give NbHL2(dmpe)2. The exchange of the hydride ligand with the ethylene protons in NbH(C2H4)2(dmpe)2 is not rapid on the 1H NMR time scale (60 MHz) at 95°C.  相似文献   

16.
用共沉淀法和负载法制备了一系列SO  相似文献   

17.
The interactions in the GeS2-Cr2S3 and Cu2GeS3-Cr2S3 sections were studied by differential thermal analysis and X-ray powder diffraction. The GeS2-Cr2S3 section was shown to be quasi-binary, with a degenerate eutectic; no ternary compound was formed. In the Cu2GeS3-Cr2S3 section, a quaternary phase of variable composition having a homogeneity range of 69–75 mol % Cr2S3 crystallized in the cubic system. The samples of this composition are spin glasses with freezing temperatures of 20–25 K.  相似文献   

18.
A comparative study is made on the efficiencies of three initiators of Fe~(2+)-H_2O_2, K_2S_2O_8 and KMnO_4 in the grafting of acrylamide onto starch. Of the three initiators the best one is KMnO_4. Moreover, the kinetic equation is also studied.  相似文献   

19.
An experimental study on the conversion of NO in the NO/N2, NO/O2/N2, NO/C2H4/N2 and NO/C2H4/O2/N2 systems has been carried out using dielectric barrier discharge (DBD) plasmas at atmospheric pressure. In the NO/N2 system, NO decomposition to N2 and O2 is the dominating reaction; NO conversion to NO2 is less significant. O2 produced from NO decomposition was detected by an on-line mass spectrometer. With the increase of NO initial concentration, the concentration of O2 produced decreases at 298 K, but slightly increases at 523 K. In the NO/O2/N2 system, NO is mainly oxidized to NO2, but NO conversion becomes very low at 523 K and over 1.6% of O2. In the NO/C2H4/N2 system, NO is reduced to N2 with about the same NO conversion as that in the NO/N2 system but without NO2 formation. In the NO/C2H4/O2/N2 system, the oxidation of NO to NO2 is dramatically promoted. At 523 K, with the increase of the energy density, NO conversion increases rapidly first, and then almost stabilizes at 93–91% of NO conversion with 61–55% of NO2 selectivity in the energy density range of 317–550 J L−1. It finally decreases gradually at high energy density. A negligible amount of N2O is formed in the above four systems. Of the four systems studied, NO conversion and NO2 selectivity of the NO/C2H4/O2/N2 system are the highest, and NO/O2/C2H4/N2 system has the lowest electrical energy consumption per NO molecule converted.  相似文献   

20.
The [PdCl2(NH2(CH2)5CH3)2] complex was tested as catalyst for 1-heptyne semihydrogenation under mild conditions of temperature and pressure in homogeneous and heterogeneous systems. Species were characterized by XPS and FTIR techniques. This revised version was published online in June 2006 with corrections to the Cover Date.  相似文献   

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