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1 INTRODUCTION The polydentate ligand nitrilotripropionic acid, H3ntp[N(CH2CH2COOH)3], has attracted conside- rable research interest in constructing coordination polymers, designing organic-inorganic hybrid mate- rials[1], synthesizing supramolecular compounds[2], etc. due to its high degree of flexibility with three carboxylic acid moieties allowing for a variety of coordination through oxygen atoms[3]. It also pro- vides other versatile properties such as the possibili- ty of inter-…  相似文献   

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顾建明  王林江 《结构化学》1996,15(3):239-242
稀土高氯酸盐开环冠醚三缩乙二醇(EO_3)[La(C_6H_(14)O_4)_3(H_2O)](ClO_4)_3·H_2O,单斜晶系,P2_1/c空间群。晶胞参数为:a=15.474(2),b=11.386(1),c=20.841(4),β=99.82(1)°,V=3618(1),MoKα,Z=4,D_c=1.718g/cm3,μ=1.499mm ̄(-1)。全矩阵最小二乘精细修正,结构因子R=0.056,R_w=0.083。中心原子La与开环冠醚醚链上的O(1)~O(9)及一个水分子形成10配位双帽四方反棱柱结构。弱配体高氯酸根不参加配位。  相似文献   

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利用不同溶剂合成并测定了希土三氯醋酸盐与α,a'-联吡啶(bipy)不同比例的配合物(I)La:bipy=1:1,[La(CCl3COO)3(bipy).H2O]2和(Ⅱ)Tb:bipy=1:2,Tb(CCl3COO)3(bipy)2.H2O,结构测定表明配合物(I)与(Ⅱ)均为三斜晶系,中心离子La(或Tb)具有配位数为8的畸变四方反棱柱多面体;但是配合物(I)形成具有对称中心的二聚体。  相似文献   

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采用交替电化学沉积和烧结的方法在Fe-13Cr合金表面制备(ZrO2-Y2O3)/(Al2O3-Y2O3)微叠层复合膜。采用高分辨扫描电镜(FE-SEM)对微叠层进行表征,结果表明(ZrO2-Y2O3)/(Al2O3-Y2O3)微叠层具有纳米结构。采用SEM,DES和增重法用来研究Fe-13Cr合金沉积(ZrO2-Y2O3)/(Al2O3-Y2O3)微叠层的抗氧化性能。实验结果表明,这种微叠层对合金抗氧化性能的提高优于分别沉积ZrO2-Y2O3或Al2O3-Y2O3膜,其抗氧化性能随着涂层中层次的增加而提高。这些有益效应可归于这种微叠层综合了ZrO2-Y2O3或Al2O3-Y2O3膜的各种优点同时克服了缺点。  相似文献   

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SkeletonVibrationsandForceConstantsof[Fe_2Cr(μ_3-O)(glycine)_6(H_2O)_3](NO_3)_7.3H_2OZhangLin-Na,LinZheng-Yan(StateKeyLaboratoryo...  相似文献   

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A POMs-based 3D zeolike ionic crystal 1, {[Co(dpdo)2(CH3CN)(H2O)2]2(SiMo12O40)- (HEO)2}n (dpdo = 4,4'-bipyridine-N,N'-dioxide), was constructed via self-assembly by embedding Keggintype [SiMo12O40]^4- polyanions within the intercrystalline voids as pillars and structurally characterized. The crystal structure was determined by single-crystal X-ray diffraction. The crystal is of triclinic, space group P1 with a = 11.430(3), b = 12.242(3), c = 14.279(3)A, α = 106.196(4),β = 94.316(4), γ = 98.294(3)°, V = 1884.5(7)A^3 Z = 1, C44H50N10O54CoEMo12Si, Mr = 2880.17, Dc = 2.538 g/cm^3, p = 2.484 mm^-1,F(000) = 1388, the final R = 0.0383 and wR = 0.1096 for 7753 observed reflections with I 〉 2σ(I). Flack factor is 0.22(3). Compound 1 is a pillar-layered framework with the [SiMo12O40]^4- anions linearly located on the square voids between the 2D bilayers which are formed by the dpdo ligands and cobalt(II) ions.  相似文献   

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用N-n-Bu4MnO4,醋酸锰,2-氯丙酸在无水乙醇溶剂中合成了三核锰配合物[Mn3O(O2CCHCICH3)6(py)2(H2O)]·2/3H2O(1·2/3H2O)。X-射线单晶衍射确定了其晶体结构。晶体属单斜晶系、C2/c空间群。3个Mn原子构成等腰三角形结构。变温磁化率研究表明配合物1存在反铁磁性交换作用。  相似文献   

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配合物1由醋酸镉和Nahca(对羟基肉桂酸钠)在水溶液中反应得到,配合物2由醋酸铜,Hhca和phen在水和乙醇混合溶液中反应得到.配合物1属正交晶系,Pbcn空间群.配合物2属单斜晶系,C2/c空间群.配合物1和2中配体中的羧酸根与金属离子都是螯合配位的,末端羟基没有参与配位.配合物1和2的结构中都包含了丰富的氢键.通过氢键作用,配合物1形成了三维网状超分子结构,配合物2形成了二维层状超分子结构.  相似文献   

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T-jump/FT-IR spectroscopy was used to study the rapid thermal decomposition activity of [Pb2(TNR)2(CHZ)2(H2O)2]·4H2O and Cd(CHZ)2(TNR)(H2O) under 0.1 MPa Ar atmosphere. The results show that the main gaseous products of [Pb2(TNR)2(CHZ)2(H2O)2]·4H2O are NH3, H2O and HONO, while CO and NO are the major gaseous products of flash pyrolysis of Cd(CHZ)2(TNR)(H2O). Thus Cd(CHZ)2(TNR)(H2O) is not an eco-friendly and chemically compatible primary explosive. Both compounds liberate volatile metal carbonate, oxide and isocyanate compounds. The combustion temperature and products of the two compounds were calculated by Real code. The results of theoretical calculation show that the combustion temperature of [Pb2(TNR)2(CHZ)2(H2O)2].4H2O is higher than that of Cd(CHZ)2(TNR)(H2O), there is no HNCO in the combus- tion products and the amount of NO is less than the experiment result from T-jump/FTIR.  相似文献   

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1 INTRODUCTIONRareEarth (RE)elementsareappliedinagricultureandmedicine .Therfore,betterunderstandingofthebondingofREionsinthecomplexeswithaminoacidsisnecessary .ThecrystalstructureofREcomplexeswiththesimplestaminoacidglycinewerestudiedbefore[1- 4].Toresearch…  相似文献   

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合成了三核苯甲酸铁配合物[Fe3O(OBZ)6(H2O)3](NO3)(acetone)5.测定了其晶体结构.其中三个铁形成等边三角形结构.配合物的变温磁化率表明,分子内三个铁之间有弱的反铁磁性交换作用,J=-33.18cm-1.分子之间则有更弱的反铁磁性交换作用,zJ'=-1.14cm-1.  相似文献   

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霍丽华  陈耐生 《结构化学》1996,15(3):187-192
用循环伏安法研究了(Mo3OCl6(O2CR)3)^-(其中R=CH3,H,CH2Cl)系列三核钼簇合物在CH3CN和DMF溶剂中的电化学行为,并用差热-热重手段研究了它们的热稳定性和热分解过程的可能机理。结果表明在不同溶剂中它们有相似的二对氧化还原峰,而且在同一溶剂中随着R基团吸电子能力的增强,相应的第一氧化还原电位值向正向移动,当R=CH3,H时,它们的起始分解温度分别为265℃和210℃,即  相似文献   

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