新型氨基酸-钨砷多金属氧酸盐K6［Cu(Ala)2*(H2O)2］2［Cu4(H2O)2(AsW9O34)2］*16H2O的合成与晶体结构

The novel amino-acid-containing polyoxometalate K6［Cu(Ala)2(H2O)2］2［Cu4(H2O)2\5(AsW9O34)2］*16H2O was synthesized from the rea ction of K10［Cu4(H2O)2(AsW9O34)2］*20H2O with β-alanine. Its structure has been determined by single crystal X-ray diffraction. It crystallizes in the triclinic space group P1, with a=1.196 3(2) nm, b=1.536 5(3) nm, c=1.591 4(3) nm, α=93.97(3)°, β=110.88(3)°, γ=101.07(3)°, V=2.651 8(9) nm3 and Z=1. Least-squares refinement of the structure leads to R and Rw factors of 0.067 3 and 0.162 8, respectively. An unusual structural feature of the compound is that the polyanion ［Cu4(H2O)2(AsW9O34)2］10- is linked with the amino-acid complex of Cu2+ by a μ-oxygen atom.     

杂多配合物抗狐脑炎病毒的活性探讨

抗病毒活性;杂多配合物抗狐脑炎病毒的活性探讨     

A Novel Three—dimensional Framework with Tunnels Based on the Cobalt—containing Molybdenum Phosphate Moieties

IntroductionThedesignandsynthesisoforganic inorganichybridma terialsareofgreatinterestinmaterialscienceowingtotheirextensiveapplicationsincatalysis ,sorptionandelectricalconductivity.1 4 Exploitationofhydrothermaltechniquesanduseoforganicstructure directingagentshavebeenprovedfruitfulmethodsintheproductionoforganic inorganichybridmaterials.5,6 Metaloxideclustersbasedonanionicmolybde numphosphatesareoneofexcellentsubfieldswithabundantstructures.Itiswellknownthatmolybdenumphosphatesathydrotherma…     

Keggin结构和Dawson结构杂多酸(盐)及其衍生物的氧化还原性质研究

本文系统研究了Keggin结构和Dawson结构两大系列几十个杂多酸(盐)及其钒和稀土衍生物LnHSiMo_(12),SiMo_(12-n)V_n,M_(1.5)PMo_(12),PMo(12-n)V_n,PW_(12-n)V_n,Ln(PMon_(11))_2,Sm(XMon_(11))_2和P_2Mo_(13-n)V_n等在溶液中的氧化还原性质,得到了它们的氧化序。发现Keggin结构杂多阴离子及其稀土衍生物还原电势与nq~2线性相关(n,q分别为中心离子的主量子数和电荷)。根据静电模型对两大系列杂多化合物的氧化还原规律性给予了合理说明。     

稀土元素钼砷杂多配合物的合成与性质研究

本文报道了通式为(NH_4)_(17)[RE(As_2Mo_(17)O_(61))_2]·nH_2O的13种杂多配合物(RE=Y,La,Ce,Pr,Nd,Sm,Eu,Gd,Tb,Dy,Ho,Er,Yb)的合成条件。研究了它们的IR、UV、CV、极谱和TG-DTA等性质。在水溶液中该配位反应为三步双电子还原机理,其杂多配合物结构为四方反棱柱型。     

多金属氧酸盐的氧化性及氧化催化作用研究新进展

结合作者近期工作，从分子及原子水平上评述了同多与杂多金属氧酸盐的氧化性及其氧化还原催化作用研究的新进展．     

Keggin结构钼磷和钼硅杂多酸盐热稳定性研究

本文用TG-DTA、DSC热谱、变温红外光谱、X射线衍射和溶解性实验方法,对四十一种Keggin结构钼磷和钼硅杂多酸的碱金属、碱土金属、过渡金属、希土元素以及有机阳离子盐的热稳定性进行了系统的研究,初步讨论了影响热稳定性的因素。得到了一些有意义的结论。     

ISOLATION AND PROPERTIES OF MOLYBDE-NUM SERIES OF HETEROPOLY BLUE WITH KEGGIN STRUCTURE

The present paper reports the methods for preparing and isolating 8 kinds of 1:12 molyb-denum series of heteropoly blue complexes K_yH_zXMo_(22)O_(40)·nH_2O (X=Si, P, As, Ge). Theproducts were characterized by elemental analyses, potential titration, polarograms, cyclicvoltammetry, IR spectra, visible--UV spectra, X--ray powder diffraction, XPS and ~(31)P NMR.The single crystal structure of 4-electron molybdenum--silicon heteropoly blue was measuredand the positions of reduced molybdenum atoms were determined, i.e. they were located atMo(3), Mo(7), Mo(8) and Mo(10). The experimental results show that the heteropoly blueremains Keggin structure. ESR spectra of heteropoly blue solids were first studied, fromwhich it was found that the delocalization extent of 2-electron heteropoly blue and 4--electronheteropoly blue is smaller than that of 1-electron heteropoly blue. The study of thermal prop-erties shows that the thermal stability increases with the increase of the reduction extentof heteropoly blue. Th     

酸度在多酸化学中的作用

近年来,多酸以一类富有应用前景且具有优异性能的多核配合物为人所瞩目。多酸化学就是关于同多酸和杂多酸的化学。同多酸涉及同多阴离子,杂多酸则涉及杂多阴离子。杂多化合物被广泛用作催化剂、     

过渡元素及镧系元素11-钨锰杂多酸钾配合物的合成与性质

本文合成了以11-钨锰杂多阴离子为配体的4个配合物:K_6Z(H_2O)MnW_(11)O_(39)xH_2O(Z=ZD、Ni)和K_(13)Ln(MnW_(11)O_(39))_2·xH_2O(Ln=La、Nd)。用化学分析、离子交换、电导滴定、IR、UV、x-射线光电子能谱等进行了表征,还对其热性质等进行了研究。