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1.
The redox properties of K17[Ln(As2W17O61)2](Ln = La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Tm or Yb) in solution were investigated using polarographic and cyclic voltammographic methods. Experimental results indicate that the heteropolyanions underwent three-step-two-electron-tungsten-reduction processes, and each reduction process was accompanied by adding two protons. 相似文献
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Recently, Many tri-component heteropoly compounds have been synthesized, but tetra-component heteropoly compounds have not been reported. It is known that mixtures of Mo and Co oxides are a promoted hydrodesulphurization catalyst. The title compound is a polyoxophosphate containing Mo, Co and W, the divalent anion possesses two-fused Keggin structure, whereas MoO_6 has been confirmed to be an elementary structure unit of isopoly and heteropoly molybdates, but it, as an idependent anion, has not been reported either. 相似文献
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Heteropoly-complexes K17[Ln(CuW11O39)2].xH2O(Ln = La, Ce, Pr, Nd, Sm, Eu, Gd, Dy) were prepared. The properties of the products were investigated by ion-exchange, conductometric titration, IR, UV and X-ray powder diffraction. The results show that the structure of the products is similar to that of U(a-Ge11O39)2 and consistent with the model proposed by Peacock. 相似文献
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ＩｎｔｒｏｄｕｃｔｉｏｎＲｅｓｓｓ［１，２］ｒｅｃｅｎｔｓｔｕｄｙｒｅｓｕｌｔｓｓｈｏｗｔｈａｔｔｈｅＦｅＭｏ－ｃｏｆａｃｔｏｒｃｏｎｓｉｓｔｓｏｆｔｗｏｃｕｂａｎｅｆｒａｇ－ｍｅｎｔｓ［Ｆｅ４Ｓ３］ａｎｄ［Ｆｅ３ＭｏＳ３］ｂｏｕｎｄｂｙｔｈｒｅｅ... 相似文献
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ＩｎｔｒｏｄｕｃｔｉｏｎＴｈｅｒｅａｒｅｍａｎｙｋｉｎｄｓｏｆｍａｇｎｅｓｉｕｍｂｏｒａｔｅｓ ,ｂｏｔｈｎａｔｕｒａｌａｎｄｓｙｎｔｈｅｔｉｃ .Ａｂｏｒａｔｅｄｏｕｂｌｅｓａｌｔ (2ＭｇＯ·2Ｂ2 Ｏ3 ·ＭｇＣｌ2 · 14Ｈ2 Ｏ)ｎａｍｅｄｃｈｌｏｒｏｐｉｎｎｏｉｔｅｗａｓｏｂ ｔａｉｎｅｄｆｒｏｍｔｈｅｎａｔｕｒａｌｃｏｎｃｅｎｔｒａｔｅｄｓａｌｔｌａｋｅｂｒｉｎｅ .1Ｉｎｏｒｄｅｒｔｏｆｉｎｄｔｈｅｆｏｒｍｉｎｇｒｅｌａｔｉｏｎｂｅｔｗｅｅｎｔｈｅｄｏｕｂｌｅｓａｌｔａｎｄｍａｇｎｅｓｉｕｍ ｂｏｒａ… 相似文献
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ZHANG Xin~ YOU Wan-sheng~ ** ZHU Zai-ming~ DANG Li-qin~ SUN Zhen-gang~ ZHENG Xue-fang~ . Institute of Chemistry for Functionalized Materials Faculty of Chemistry Chemical Engineering Liaoning Normal University Dalian P. R. China . Liaoning Key Laboratory of Bio-organic Chemistry Dalian University Dalian P. R. China 《高等学校化学研究》2007,(1)
IntroductionPolyoxometalates are used as the versatile inorga-nic building blocks for the construction of molecular-based materials[1—7]. Nanosized polyoxometalates aresuitable building blocks for the construction of crystal-line microporous structural m… 相似文献
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1 INTRODUCTION Though the investigation on chemistry of tran- sition metal-peroxy complexes has been extensively carried out, up to now, only four structures of purely inorganic dimeric peroxovanadates have been deter- mined by single-crystal X-ray meth… 相似文献
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1 INTRODUCTION The self-assembly of organic-inorganic hybrid ma- terials is an intriguing area, which is yielding new generations of supramolecular architectures[1, 2]. Coor- dination by transition metals with multifunctional ligands is one of the main design principles. As a rigid multi-dentate ligand, 5-aminoisophthalic acid (AIP) has received considerable attention owing to the variety of bridging abilities[3~8]. It can engage in three types of intermolecular interactions: (1) M-L b… 相似文献
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WANG Xiao-Guang 《结构化学》1997,(3)
1mTh0DUCTIONHeteropolycomp1exespossessalotofdistinctivecharacteristicsasmolecularm0delofcatalystdesign"'.Considerableattentionhasbeengiventothecrystalstruc-turesofheteropolycomplexescontainingdifferentcomponents,andmanyofthecrystalstructuresofthesec0mplexeshavebeendetermined.Wereportedprevious1ythecrystalstructureoftheheteropolyc0mplexeswithlanthanide,inwhichtw0kindsofelementsarecontainedinthemonolacunaryheteropolyligand".",theorientationsoftheminthecrystalareordered.Inthispaper,thecrystals… 相似文献
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WANG Jun ** ZHANG Xiang dong MA RuiDepartment of Chemistry Liaoning University Shenyang P. R. China 《高等学校化学研究》2002,18(3)
IntroductionThe compounds of the radioactive metal90 Yare often used for the treatment of all kinds ofcancer[1] because90 Y has an appropriate half- life( t1/2 =64.0 h) and moderate energy( Emax=2 .2 7Me V) .However,the compounds of the radioactivemetals usually result in the strong toxicities tohuman bodies because they can react with somebiological molecules in human bodies.In addition,the radioactive metal compounds can not only killtumor cells but also harm a large quantity ofnormal cell… 相似文献
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Ｓｙｎｔｈｅｓｉｓ，ＳｔｒｕｃｔｕｒｅａｎｄＰｒｏｐｅｒｔｉｅｓｏｆα┐Ｋｅｇｇｉｎ┐ｔｙｐｅｏｆＫ６Ｈ３［ＺｎＷ１１Ｏ４０Ａｌ］·９．５Ｈ２Ｏ＊ＹＡＮＧＱｉ－ｈｕａ，ＦＵＱｉａｎｇ，ＬＩＵＪｉｎｇ－ｆｕ＊＊（ＤｅｐａｒｔｍｅｎｔｏｆＣｈｅｍｉｓｔｒ... 相似文献
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IntroductionInthelastfewyearsthesearchfornewmaterialswithmicroporousandzeolite analogoussystemshasprimarilyfocusedonaluminumphosphatesandaluminosilicatecom poundssubstitutedwithavarietyofatoms .1 3 Cobalt sub stitutedaluminophosphatesaresystematicallystudiedmainlyduetotheirpotentialuseassolid acidcatalysts .Insuchmaterials ,theBr nstedacidsiteisgeneratedbyeachsubstitutionofAl(III)byCo(II)inwhichaprotonisneededtobalancethecharge .4 7Tofindnewtypeofze oliticmaterials ,theborophosphatemateri… 相似文献
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A novel coordination complex [Zn(bipy)2(H2O)4]·L·3H2O (1, bipy = 4,4'-bipyridine, LHNa = aniline-2,5-disulfonic acid monosodium salt) has been synthesized from LHNa by using hydrothermal method and structurally characterized. The result indicates that complex 1 belongs to the monoclinic system, space group P21/c with a = 20.392(3), b = 7.4052(12), c = 23.843(3) , β = 116.253(10)°, V = 3.2291(8) 3, Z = 4, Dc = 1.553 g·cm-3, μ = 0.962 mm-1, F(000) = 1568, and the final R = 0.0497 and wR = 0.1290. The complex 1 has a 0-D discrete structure, and generates an infinite 3-D network with the aid of O–H…O hydrogen bonds and π-π interactions. 相似文献
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1 INTRODUCTION The chemistry of polyoxometalates continues to attract interest as a result of their realized and potential applications in diverse fields, such as cata- lysis, analysis, biochemistry, medicine and material science[1～3]. In the past few … 相似文献
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1 INTRODUCTION Orotic acid (H3dtpc), an important pyrimidine derivative as the effective precursor in the biosynthesis of pyrimidine base of nucleic acids in living organisms, plays a unique role in bioinorganic and pharmaceutical. Aside from the biological interest, orotic acid is also interesting in coordination chemistry. Its ketonic and enolic tautomers along with asymmetric geometry make it to be a very good versatile polydentate ligand[1~5]. The incorporation of metals into supram… 相似文献
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1 INTRODUCTION The polyoxoanion-based inorganic and organo- metallic complexes, especially isopolymolybdates, have attracted considerable interest for their appli- cations in catalysis, sorption, clathration, magnetism and photochemistry[1]. Octamoly… 相似文献
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Heteropoly complexes K11[Ln(CaW 11O39H2)21 · x H2O(Ln=La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy ) have been prepared and analysed. Some properties such as thermal behavior, IK and UV spectra, X-ray powder diffraction, magnetic susceptibility and X-ray photoelectron spectrum have been investigated. 相似文献
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1 INTRODUCTION The complexes of amino acid Schiff base have attracted considerable attention because of their bio- activities[1, 2]. Taurine is a special amino acid in be- ings, and recently the complexes of taurine conden- sation salicylaldehyde Schiff … 相似文献