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1INTRODUCTIONPolyoxometallates(POM)areofgreatinterestnotonlyfortheirstructuralvarietybutalsotheirunexpectedproperties[1,2].Theseinorganicanionshavebeenwidelyinvestigatedasdiversascatalysis,biology,medicine,magnetochemistryandmaterialscience[3~7].Thestudiesonthecoordinatedpoly-oxometallateswithorganicligandsmighthelptounderstandtherolesofpolyoxometallatesoncatalysis.Todate,aseriesofoctamolybdateswhichcanbedescribedas[Mo8O26X2]2n-4(nisthenormalchargeofthecoordinatedbaseX)havebeenreport… 相似文献
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本文描述了两个具有相似阴离子骨架的化合物,[Na2(H2O)10(NH4)4][V10O28](1)和[Na2(H2O)10(NH4)4][V9MoO28](2).化合物1的阴离子是一个常见的钒十骨架,而化合物2与化合物1是同晶异质体,化合物2的阴离子是混有一个钼原子的钒十骨架.X-射线晶体结构测定表明,这两个化合物均属于三斜晶系,P1空间群.晶胞参数分别为化合物1a=0.86024(4)nm,b=1.04561(5)nm,c=1.12828(4)nm,α=68.833(1)°,β=87.158(1)°,γ=67.065(1)°;化合物2a=0.86511(3)nm,b=1.04549(5)nm,c=1.12446(5)nm,α=69.071(1)°,β=87.145(1)°,γ=66.982(1)°. 相似文献
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采用水热反应合成了有机-无机杂化的Keggin型配合物(C12H9N2)3[PMo12O40],并通过X-射线单晶衍射对其结构进行了分析。该配合物为正交晶系P212121空间群,晶胞参数为a=1.20800(1)nm,b=2.10108(4)nm,c=2.24234(5)nm。配合物包含了孤立的Keggin型[PMo1... 相似文献
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苯四甲酸桥连的镍配合物[Ni(btec)(H2O)4][Ni(imi)2(H2O)4]·2H2O的合成及结构 总被引:3,自引:0,他引:3
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在水热条件下,合成了1个新的双核锌配合物[(ZnCl2)(PyBIm)]2(PyBIm=2-(4-pyridyl)benzimidazole)。该配合物为单斜晶系,P21/n空间群,晶胞参数a=0.774 51(4) nm,b=1.252 49(5) nm,c=1.315 96(7) nm,β=100.294(3)°,V=1.256 0(1) nm3,Z=2。结构分析表明,Zn被2个Cl原子和来自PyBIm配体的2个N原子配位,形成了1个变形四面体结构。在该配合物中,Zn…Zn距离为 0.709 4(5) nm,结构中存在π…π堆积和氢键作用。 相似文献
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亚氨基二乙酸在磷酸作用下,通过水热反应合成了2,5-二酮哌嗪-N,N'-酸,收率76%,其结构经UV-Vis,^1H NMR,IR,元素分析及X-射线单晶衍射表征。 相似文献
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At room temperature, a coordination polymer [Ni(btec)(H2O)4][Ni(imi)2(H2O)4]·2H2O was synthesized by reaction of NiCl2·6H2O, 1,2,4,5-benzenetetracarboxylic dianhydridc and imidazole in a water/THF solution. The structure was determined by X-ray diffraction crystal structure analysis. It crystallizes in triclinic P1 space group with the crystal cell parameters of a=0.67542 (2) nm, b=1.000 14 (1) nm, c=1.09088 (3) nm, α=74.140(2)°, β= 74.388(1)°, y=73.239(2)°, and V=0.664 09(3) nm3, Z=1. The crystal structure shows that Ni1 atom is coordinated by four water and two imidazole molecules, while Ni2 is coordinated by four water molecules and two carboxyl oxygen atoms. The 1,2,4,5-benzenetetracarboxylate ions bridge Ni2 coordination centers to form one-dimensional chain structure. Moreover, the chains are further linked together by hydrogen bonds to form a two-dimensional network. CCDC: 295873. 相似文献
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1 INTRODUCTION Schiff base ligands have been studied for a longtime due to the instant and enduring popularity fromtheir easy synthesis and versatility complexes. Theyplay an important role in the development of coor-dination chemistry as well as inorganic biochemistry,catalysis, optical materials and so on[1, . Consider- 2]able attention has been focused on the syntheses andstructures of copper(II) and nickle(II) complexes.The nickel complexes with multidentate Schiff baseligands have … 相似文献
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1INTRODUCTION Imidazole(Him)or pyrazole(Hpz)and its deriva-tives in their deprotonated forms have been exten-sively employed in building a large variety of po-lynuclear complexes and polymeric systems[1].A number of metal imidazolates have been studied owing to their fascinating properties and great poten-tial applications,such as high thermal stability[2],magnetic hysteresis[3],luminescence[4]as well as anticorrosive[5]and microbial activities[6].As an im-portant branch,copper imidazolat… 相似文献
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通过向钼酸、醋酸锰和冰乙酸的混合溶液中滴加30%过氧化氢,合成了一个未见报道的具有Waugh结构的多钼氧簇合物(H3O)6[MnMo9O32]·3H2O2(1),其结构和性能经X-射线单晶衍射,IR和FL表征。1属三方晶系,R32空间群,晶胞参数a=b=15.936 8(6) , c=12.406 7(7) , γ=120.0°, V=2 728.9(2) 3, Z=3, Dc=3.006 g·cm-3, Mr=1 646.59, μ(MoKα)=3.459 mm-1, F(000)=2 337,R=0.026 2, wR=0.068 1。晶体结构分析表明:化合物阴离子包含9个MoO6八面体单元和1个MnO6八面体单元,其中在MnMo3单元的上下各有三个MoO6八面体。荧光性能研究表明:在波长300 nm光激发下,1在410 nm处有强的荧光发射。 相似文献