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Science China Chemistry 2006年第5期49卷 437-444页

作者： wang jingping li jie niu jingyang Institute of Molecular and Crystal Engineering Institute of Chemistry and Chemical Engineering Henan University Kaifeng 475001 China Institute of Molecular and Crystal Engineering Institute of Chemistry and Chemical Engineering Henan University Kaifeng 475001 China Institute of Molecular and Crystal Engineering Institute of Chemistry and Chemical Engineering Henan University Kaifeng 475001 China

A two-dimensional network compound [Ce(DMF)4(H2O)][α-BW12O40]·H2O·(HDMA)2 (HDMA = protoned dimethylamine, DMF = N,N-dimethylformamide) was synthesized from α-H5BW12O40·nH2O, Ce(NO3)3·6H2O and DMF and characterized by IR, UV spectra and TG-DTA. The result of the X-ray single crystal diffraction indicates that the crystal is monoclinic, space group P21/n, with unit cell dimensional: a = 1.1983(3), b = 2.4216(5), c = 1.9517(4) nm, β = 92.91(3)°, Z = 4, R1 = 0.07710, wR2 = 0.1416. Structural analysis indicates that every [Ce(DMF)4(H2O)]3+ building block is surrounded by three adjacent [α-BW12O40]5- polyanions, meanwhile, every [α-BW12O40]5- polyanion interconnects with three neighboring [Ce(DMF)4(H2O)]3+ subunits, by making use of which two-dimensional network structure can be constructed. The result of thermogravimetric analysis manifests that the title compound has two-stage weight loss and the decomposition temperature of the title polyanionic framework is 560℃ . The electrochemical analysis shows the title polyanion has three-step redox processes in the pH = 4―7 media.

关键词： borotungstic acid, network structure, polyoxometalates, crytal structure.

Construction of one Ru_(2)W_(12)-cluster and six lacunary Keggin tungstoarsenate leading to the larger Ru-containing polyoxometalate photocatalyst

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Chinese Chemical Letters 2022年第10期33卷 4664-4668页

作者： Huafeng li Mengnan Yang Zelong Yuan Yahao Sun Pengtao Ma jingyang niu jingping wang Henan Key Laboratory of Polyoxometalate Chemistry College of Chemistry and Chemical EngineeringHenan UniversityKaifeng 475004China

Construction of two Ru^(Ⅲ)cations and six lacunary Keggin fragments resulted in a novel Ru_(2)W_(12)-cluster{(RuO_(6))_(2)(WO_(3))_(12)(H_(2)O)_(12)}bridged polyoxometalate,NaH_(11)[(RuO_(6))(AsW_(9)O_(33))_(3){(W_(6)O_(3))(H_(2)O)_(6)}]_(2)53H_(2)O(NaH_(11)·1·53H_(2)O),which represent the largest cluster in all the Ru-containing *** most interesting characteristic is that the symmetry-related Ru_(2)W_(12)-cluster-based hexamers contain two windmill-shaped[(RuO_(6))(AsW_(9)O_(33))_(3){(W_(6)O_(3))(H_(2)O)_(6)}]trimers or the Ru_(2)W_(12) cluster was tightly wrapped by six segments of B-β-AsW_(9)O_(33).The other remarkable feature is that there have one intriguing cubane structure:which is composed of the Ru(1,2)and W(1,28,50,51,52,53)*** oxygenation reactions of anilines to azoxybenzenes was evaluated when NaH_(11)·1·53H_(2)O served as effective catalyst by probing various *** inherent redox property of oxygen-rich polyoxometalate surfaces and high photocatalytic activity of the Ru-containing metal cluster imbedded in NaH_(11)·1·53H_(2)O provide sufficient driving force for the photocatalytic transformation from anilines to *** oxidation of anilines can be realized with higher selectivity to afford various azoxybenzene *** durability test shows that Ru-doping catalyst displays excellent chemical stability during the photocatalytic process.

关键词： Ru-containing polyoxometalate Photocatalyst Oxidation Azoxy compounds Durability

Synthesis,structure and properties of three novel transition-metal-containing tantalum-phosphate clusters

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Chinese Chemical Letters 2022年第10期33卷 4675-4678页

作者： Xue li Hui Zhao Yuyan li Yuanyuan Yang Mingyang Zhang Suyi liu Pengtao Ma jingping wang jingyang niu Henan Key Laboratory of Polyxometalate Chemistry College of Chemistry and Chemical EngineeringHenan UniversityKaifeng 475004China

Peroxide ligation of aqueous metal-oxo clusters provides rich speciation and structural ***,three novel transition-metal derivatives of polyoxometalate anions,[Ni_(2)(H_(2)O)_(10){P_(4)Ta_(6)(O_(2))_(6)O_(24)}]^(6-)(1a),[Zn(H_(2)O)_(4){P_(4)Ta_(6)(O_(2))_(6)O_(24)}]^(8-)(2a)and[Cd(H_(2)O)_(4){P_(4)Ta_(6)(O_(2))_(6)O_(24)}]^(8-)(3a),have been successfully synthesized by adopting a one-pot reaction *** of these hexatantalates are built from a new-type phosphorus-incorporated *** investigated the solution behaviors,and the peak assignments of the MS spectra indicated some degree of stability of them in ***,the proton-conducting ability of compound 1a was also explored and it has shown well conductivity at high relative humidities,with conductivity achieved 1.22×10^(-3) S/cm(85℃,90%RH).

关键词： Polyoxotantalates Transition-metal Synthesize Structure Proton-conduction

Synthesis and structure of an organic-inorganic hybrid Keggin-type polymolybdate

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Synthesis and structure of an organic-inorganic hybrid Keggi...

六次甲基四胺与H_nXW_(12)O_(40)·mH_2O(X=P,Si,Ge)电荷转移盐的合成、表征及非线性光学性质研究

河南省化学会2018年学术年会

作者： Dandan li Pengtao Ma jingping wang jingyang niu Henan Key Laboratory of Polyoxometalate Chemistry Institute of Molecular and Crystal EngineeringCollege of Chemistry and Chemical EngineeringHenan University

Organic-inorganic hybrid Keggin-type polyoxometalates,predominantly polymolybdates,have certain potential values in theory and practical *** this work,we present a new organic-inorganic hybrid Keggin-type polymolybdate,[Cu(pz)][PMoO](pz=pyrazine),which was synthesized by one-pot hydrothermal ***-crystal X-ray crystallography reveals that the compound 1 consists of one{PMoO}anion,three copper ions,and three pz *** 1,each pz ligand,as a linker,bridges two adjacent copper ions by Cu-N ***,each copper ion adopts linear coordination geometry to connect with two N atoms of two pz ligands,resulting in a 1D[Cu(pz)]infinite *** addition,the bond valence sum analyses indicate that the P and Mo atoms are in+4 and+6 oxidation states,respectively,and all the Cu atoms are in+1 oxidation state.

关键词： Polyoxometalate Hydrothermal synthesis Organic-inorganic hybrid materials

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化学研究 1999年第3期10卷 1-3,7页

作者：王敬平于丽柏艳党东宾牛景扬河南大学化学化工学院开封475001

合成了由六次甲基四胺与Ｈ３ＰＷ１２Ｏ４０·ｎＨ２Ｏ，Ｈ４ＳｉＷ１２Ｏ４０·ｎＨ２Ｏ和Ｈ４ＧｅＷ１２Ｏ４０·ｎＨ２Ｏ形成的具有非线性光学性质的电荷转移盐，并由元素分析，红外光谱，电子光谱进行了表征。结果表明固体中阴阳... 详细信息

合成了由六次甲基四胺与Ｈ３ＰＷ１２Ｏ４０·ｎＨ２Ｏ，Ｈ４ＳｉＷ１２Ｏ４０·ｎＨ２Ｏ和Ｈ４ＧｅＷ１２Ｏ４０·ｎＨ２Ｏ形成的具有非线性光学性质的电荷转移盐，并由元素分析，红外光谱，电子光谱进行了表征。结果表明固体中阴阳离子之间存在强的相互作用；非线性光学性质研究表明，三种电荷转移盐的倍频效应分别为ＫＨ２ＰＯ４（ＫＤＰ）的０．１７，０．２５和０．０６倍；三阶非线性系数分别为６．２ ×１０－１３ｅｓｕ，８．１ ×１０－１３ｅｓｕ和４．３ ×１０－１３ｅｓｕ。

关键词：杂多酸六次甲基四胺电荷转移盐非线性光学

杂多酸电荷转移盐的制备、表征及非线性光学性质研究——H_3PMo_(12-n)W_nO_(40)·mH_2O和六次甲基四胺形成的电荷转移盐

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河南大学学报（自然科学版） 1999年第3期29卷 8-11页

作者：王敬平柏艳党东宾于丽牛景扬河南大学化学化工学院河南开封475001

以Ｈ３ＰＭｏ１２－ｎＷｎＯ４０ ·ｍＨ２Ｏ和六次甲基四胺为原料合成了一系列电荷转移盐，并用元素分析，红外光谱，电子光谱进行了表征．红外光谱和漫反射电子光谱研究表明在固体中阴离子和有机阳离子之间存在强的相互... 详细信息

以Ｈ３ＰＭｏ１２－ｎＷｎＯ４０ ·ｍＨ２Ｏ和六次甲基四胺为原料合成了一系列电荷转移盐，并用元素分析，红外光谱，电子光谱进行了表征．红外光谱和漫反射电子光谱研究表明在固体中阴离子和有机阳离子之间存在强的相互作用；非线性光学性质研究表明，随着化合物分子内钨取代数的增多，化合物二阶倍频效应增强。

关键词：杂多酸六次甲基四胺电荷转移盐非线性光学