Synthesis and Characterization of New Rare‐Earth Sandwich‐Type Tungstoarsenates

References

• Pope , M. T. 1983 . Heteropoly and Isopoly Oxometalates Berlin : Springer‐Verlag .
   Google Scholar
• Pope , M. T. and Müller , A. 1994 . Polyoxometalates: From Platonic Solids to Anti‐Retroviral Activity Dordrecht : Kluwer .
   Google Scholar
• Marcu , G. and Rusu , M. 1997 . Polyoxometalates Chemistry Bucureşti : Editura Tehnică .
   Google Scholar
• Hill , C. L. 1998 . “ Polyoxometalates ” . In Chem. Rev. Edited by: Hill , C. L. Vol. 98(1) ,
   Google Scholar
• Pope , M. T. and Müller , A. 2001 . Polyoxometalate Chemistry: From Topology Via Self‐Assembly to Applications Dordrecht : Kluwer Academic Publishers .
   Google Scholar
• Yamase , T. and Pope , M. T. 2002 . Polyoxometalate Chemistry for Nano‐Composite Design New York : Kluwer Academic/Plenum Publishers .
   Google Scholar
• Borras‐Almenar , J. J. , Coronado , E. , Müller , A. and Pope , M. T. 2003 . Polyoxometalate Molecular Science Dordrecht : Kluwer Academic Publishers .
   Google Scholar
• Massart , R. , Contant , R. , Fruchart , J. M. , Ciabrini , J. P. and Fournier , M. 1977 . Phosphorus‐31 NMR studies on molybdic and tungstic heteropolyanions. Correlation between structure and chemical shift . Inorg. Chem. , 16 ( 11 ) : 2916 – 2921 .
   Web of Science ®Google Scholar
• Finke , R. G. and Droege , M. W. 1983 . Trivacant heteropolytungstate derivatives. 2. Synthesis, characterization, and tungsten‐183 NMR of P4W30M4(H2O)2O112 16− (M=Co, Cu, Zn) . Inorg. Chem. , 22 ( 6 ) : 1006 – 1008 .
   Web of Science ®Google Scholar
• Xin , F. and Pope , M. T. 1996 . Polyoxometalate derivatives with multiple organic groups. 3. Synthesis and structure of bis(phenyltin) bis(decatungstosilicate), [(PhSnOH2)2(γ‐SiW10O36)2]10− . Inorg. Chem. , 35 ( 19 ) : 5693 – 5695 .
   PubMed Web of Science ®Google Scholar
• Xin , F. , Pope , M. T. , Long , G. J. and Russo , U. 1996 . Polyoxometalate derivatives with multiple organic groups. 2. Synthesis and structures of tris(organotin) α,β‐Keggin tungstosilicates . Inorg. Chem. , 35 ( 5 ) : 1207 – 1213 .
   PubMed Web of Science ®Google Scholar
• Rusu , M. , Mureşan , L. , Tomşa , A. R. , Rusu , D. and Marcu , G. 2000 . New organotin derivatives of Keggin polyoxomolybdates . Synth. React. Inorg. Met.‐Org. Chem. , 30 ( 3 ) : 499 – 511 .
   Web of Science ®Google Scholar
• Bi , L. , Kortz , U. , Nellutla , S. , Stowe , A. C. , van Tol , J. , Dalal , N. S. , Keita , B. and Nadjo , L. 2005 . Structure, electrochemistry, and magnetism of the iron(III)‐substituted Keggin dimer, [Fe6(OH)3(A‐α‐GeW9O34(OH)3)2]11‐ . Inorg. Chem. , 44 ( 4 ) : 896 – 903 .
   PubMed Web of Science ®Google Scholar
• Bi , L. , Kortz , U. , Keita , B. , Nadjo , L. and Borrmann , H. 2004 . Palladium(II)‐substituted tungstosilicate [Cs2K(H2O)7Pd2WO(H2O)(A‐α‐SiW9O34)2]9− . Inorg. Chem. , 43 ( 26 ) : 8367 – 8372 .
   PubMed Web of Science ®Google Scholar
• Kortz , U. , Nellutla , S. , Stowe , A. C. , Dalal , N. S. , Rauwald , U. , Danquah , W. and Ravot , D. 2004 . Sandwich‐type germanotungstates: Structure and magnetic properties of the dimeric polyoxoanions [M4(H2O)2(GeW9O34)2]12− (M=Mn2+, Cu2+, Zn2+, Cd2+) . Inorg. Chem. , 43 ( 7 ) : 2308 – 2317 .
   PubMed Web of Science ®Google Scholar
• Weakley , T. J. R. , Evans , H. T. , Showell , J. S. , Tourné , G. F. and Tourné , C. M. J. 1973 . 18‐Tungstotetracobalto(II) diphosphate and related anions. Novel structural class of heteropolyanions . Chem. Soc., Chem. Commun. , 4 : 139 – 140 .
   Google Scholar
• Finke , R. G. , Droege , M. , Hutchinson , J. R. and Gansow , O. 1981 . Trivacant heteropolytungstate derivatives: the rational synthesis, characterization, and tungsten‐183 NMR spectra of P2W18M4(H2O)2O68 10− (M=cobalt, copper, zinc) . J. Am. Chem. Soc. , 103 ( 6 ) : 1587 – 1589 .
   Web of Science ®Google Scholar
• Weakley , T. J. R. 1984 . The identification and x‐ray structure of the diphosphatotris(nonatungstophosphato)nonacobaltate(II) heteropolyanion . J. Chem. Soc., Chem. Comm. , : 1406 – 1407 .
   Google Scholar
• Knoth , W. H. , Domaille , P. J. and Farlee , R. D. 1985 . Anions of the type (RMOH2)3W18P2O68 9− and [H2OCo]3W18P2O68 12−. A reinvestigation of “B,β‐W9PO34 9−” . Organometallics , 4 ( 1 ) : 62 – 68 .
   Google Scholar
• Evans , H. T. , Tourné , C. M. , Tourné , G. F. and Weakley , T. J. R. 1986 . X‐ray crystallographic and tungsten‐183 nuclear magnetic resonance structural studies of the [M4(H2O)2(XW9O34)2]10− heteropolyanions (M=CoII or Zn, X=P or As) . J. Chem. Soc. Dalton Trans. , 12 : 2699 – 2705 .
   Google Scholar
• Knoth , W. H. , Domaille , P. J. and Harlow , R. L. 1986 . Heteropolyanions of the types M3(W9PO34)2 12− and MM′M″(W9PO34)2 12−: Novel coordination of nitrate and nitrite . Inorg. Chem. , 25 ( 10 ) : 1577 – 1584 .
   Web of Science ®Google Scholar
• Finke , R. G. , Droege , M. W. and Domaille , P. J. 1987 . Trivacant heteropolytungstate derivatives. 3. Rational syntheses, characterization, two‐dimensional tungsten‐183 NMR, and properties of tungstometallophosphates P2W18M4(H2O)2O68 10− and P4W30M4(H2O)2O112 16− (M=cobalt, copper, zinc) . Inorg. Chem. , 26 ( 23 ) : 3886 – 3896 .
   Web of Science ®Google Scholar
• Weakley , T. J. R. and Finke , R. G. 1990 . Single‐crystal x‐ray structures of the polyoxotungstate salts K8.3Na1.7[Cu4(H2O)2(PW9O34)2]·24H2O and Na14Cu[Cu4(H2O)2(P2W15O56)2]·53H2O . Inorg. Chem. , 29 ( 6 ) : 1235 – 1241 .
   Web of Science ®Google Scholar
• Moore , B. and Foger , K. 1991 . Heteropolytungstate derivatives: Isomerization of PW9O34 9− and reaction with Co2+ and Mn2+ . Inorg. Chim. Acta , 181 ( 2 ) : 201 – 205 .
   Web of Science ®Google Scholar
• Tourné , C. M. , Tourné , G. F. and Zonnevijlle , F. 1991 . Chiral polytungstometalates [WM3(H2O)2(XW9O34)2]12− (X=M=zinc or cobalt) and their M‐substituted derivatives. Syntheses, chemical, structural and spectroscopic study of some D,L sodium and potassium salts . J. Chem. Soc. Dalton Trans. , : 143 – 155 .
   Google Scholar
• Gomez‐Garcia , C. J. , Coronado , E. , Gomez‐Romero , P. and Casan‐Pastor , N. 1993 . A tetranuclear rhomblike cluster of manganese(II). Crystal structure and magnetic properties of the heteropoly complex K10[Mn4(H2O)2(PW9O34)2]·20H2O. . Inorg. Chem. , 32 ( 15 ) : 3378 – 3381 .
   Web of Science ®Google Scholar
• Xin , F. and Pope , M. T. 1994 . Polyoxometalate derivatives with multiple organic groups. 1. Synthesis and structures of tris(organotin) β‐Keggin and α‐Dawson tungstophosphates . Organometallics , 13 ( 12 ) : 4881 – 4886 .
   Web of Science ®Google Scholar
• Galan‐Mascaros , J. R. , Gomez‐Garcia , C. J. , Borras‐Almenar , J. J. and Coronado , E. 1994 . High nuclearity magnetic clusters: magnetic properties of a nine cobalt cluster encapsulated in a polyoxometalate, [Co9(OH)3(H2O)6(HPO4)2(PW9O34)3]16− . Adv. Mater. , 6 ( 3 ) : 221 – 223 .
   Web of Science ®Google Scholar
• Gomez‐Garcia , C. J. , Borras‐Almenar , J. J. , Coronado , E. and Ouahab , L. 1994 . Single‐crystal X‐ray structure and magnetic properties of the polyoxotungstate complexes Na16[M4(H2O)2(P2W15O56)2]·nH2O (M=MnII, n=53; M=NiII, n=52): an antiferromagnetic MnII tetramer and a ferromagnetic NiII tetramer . Inorg. Chem. , 33 ( 18 ) : 4016 – 4022 .
   Web of Science ®Google Scholar
• Mazeaud , A. , Ammari , N. , Robert , F. and Thouvenot , R. 1996 . Coordination chemistry of polyoxometalates: rational synthesis of the mixed organosilyl derivatives of trivacant polyoxotungstates α‐A‐[PW9O34(tBuSiO)3(RSi)]3− and α‐B‐[AsW9O33(tBuSiO)3(HSi)]3− . Angew. Chem., Int. Ed. Eng. , 35 ( 17 ) : 1961 – 1964 .
   Web of Science ®Google Scholar
• Kawafune , I. and Matsubayashi , G. 1996 . Isolation and spectroscopic properties of A‐β‐[PV3W9O40]6− anion salts and their isomerization to the α‐isomers . Bull. Chem. Soc. Jpn. , 69 ( 2 ) : 359 – 365 .
   Web of Science ®Google Scholar
• Zhang , X. , Jameson , G. B. , O'Connor , C. J. and Pope , M. T. 1996 . High‐valent manganese in polyoxotungstates‐II. Oxidation of the tetramanganese heteropolyanion [Mn4(H2O)2(PW9O34)2]10− . Polyhedron , 15 ( 5/6 ) : 917 – 922 .
   Web of Science ®Google Scholar
• Xin , F. and Pope , M. T. 1996 . Lone‐pair‐induced chirality in polyoxotungstate structures: tin(II) derivatives of A‐type XW9O34 n− (X=P, Si). Interaction with amino acids . J. Am. Chem. Soc. , 118 ( 33 ) : 7731 – 7736 .
   Web of Science ®Google Scholar
• Zhang , X. , Chen , Q. , Duncan , D. C. , Lachicotte , R. J. and Hill , C. L. 1997 . Multiiron polyoxoanions. synthesis, characterization, X‐ray crystal structure, and catalytic H2O2‐based alkene oxidation by [(n‐C4H9)4N]6[FeIII 4(H2O)2(PW9O34)2] . Inorg. Chem. , 36 ( 20 ) : 4381 – 4386 .
   PubMed Web of Science ®Google Scholar
• Raţiu , C. , Macarovici , D. , Budiu , T. and Văţulescu , R. 1998 . Formation of the heteropoly anion [Pd4(PW9O34)2]10− in solution . Rev. Chim. , 49 ( 7 ) : 497 – 500 .
   Web of Science ®Google Scholar
• Alloul , L. , Ammari , N. , Mayer , C. R. , Mazeaud , A. and Thouvenot , R. 1998 . Organic‐inorganic hybrids based on polyoxometalates. Part IV: A multinuclear magnetic resonance structural investigation . J. Chim. Phys. Phys. Chim. Biol. , 95 ( 2 ) : 289 – 294 .
   Google Scholar
• Mayer , C. R. and Thouvenot , R. 1998 . Organophosphoryl derivatives of trivacant tungstophosphates of general formula α‐A‐[PW9O34(RPO)2]5−: synthesis and structure determination by multinuclear magnetic resonance spectroscopy (31P, 183W) . J. Chem. Soc. Dalton Trans. , 1 : 7 – 14 .
   Google Scholar
• Bereau , V. , Cadot , E. , Bögge , H. , Müller , A. and Secheresse , F. 1999 . Addition of {M2S2O2}2+, M=Mo, W, to A‐α‐[PW9O34]9−. Synthesis and structural characterizations in the solid state and in solution . Inorg. Chem. , 38 ( 25 ) : 5803 – 5808 .
   Web of Science ®Google Scholar
• Kim , K. C. and Pope , M. T. 1999 . Cation‐directed structure changes in polyoxometalate chemistry. Equilibria between isomers of bis(9‐tungstophosphatodioxouranate(VI)) complexes . J. Am. Chem. Soc. , 121 ( 37 ) : 8512 – 8517 .
   Web of Science ®Google Scholar
• Kortz , U. , Tézé , A. and Hérvé , G. 1999 . A cubane‐substituted polyoxoanion: structure and magnetic properties of Cs2[H2PW9Ni4O34(OH)3(H2O)6]·5H2O . Inorg. Chem. , 38 ( 9 ) : 2038 – 2042 .
   PubMed Web of Science ®Google Scholar
• Clemente‐Juan , J. M. , Coronado , E. , Galan‐Mascaros , J. R. and Gomez‐Garcia , C. J. 1999 . Increasing the nuclearity of magnetic polyoxometalates. Syntheses, structures, and magnetic properties of salts of the heteropoly complexes [Ni3(H2O)3(PW10O39)H2O]7−, [Ni4(H2O)2(PW9O34)2]10−, and [Ni9(OH)3(H2O)6(HPO4)2(PW9O34)3]16− . Inorg. Chem. , 38 ( 1 ) : 55 – 63 .
   Web of Science ®Google Scholar
• Clemente‐Juan , J. M. and Coronado , E. 1999 . Magnetic clusters from polyoxometalate complexes . Coord. Chem. Rev. , : 193 – 195 . 361 – 394 .
   Web of Science ®Google Scholar
• Clemente‐Juan , J. M. , Andres , H. , Borras‐Almenar , J. J. , Coronado , E. , Güdel , H. U. , Aebersold , M. , Kearly , G. , Büttner , H. and Zolliker , M. 1999 . Magnetic excitations in polyoxometalate clusters observed by inelastic neutron scattering: Evidence for ferromagnetic exchange interactions and spin anisotropy in the tetrameric nickel(II) cluster [Ni4(H2O)2(PW9O34)2]10− and comparison with the magnetic properties . J. Am. Chem. Soc. , 121 ( 43 ) : 10021 – 10027 .
   Web of Science ®Google Scholar
• Andres , H. , Clemente‐Juan , J. M. , Aebersold , M. , Güdel , H. U. , Coronado , E. , Büttner , H. , Kearly , G. , Melero , J. and Burriel , R. 1999 . Magnetic excitations in polyoxometalate clusters observed by inelastic neutron scattering: Evidence for anisotropic ferromagnetic exchange interactions in the tetrameric cobalt(II) cluster [Co4(H2O)2(PW9O34)2]10−. Comparison with the magnetic and specific heat properties . J. Am. Chem. Soc. , 121 ( 43 ) : 10028 – 10034 .
   Web of Science ®Google Scholar
• Rusu , M. , Rusu , D. , Roşu , C. , Tomşa , A. R. and Marcu , G. 1999 . Uranium (IV) polyoxotungstophosphate . J. Radioanalyt. Nucl. Chem. , 242 ( 2 ) : 467 – 472 .
   Google Scholar
• Rusu , M. , Tomşa , A. R. , Rusu , D. and Haiduc , I. 1999 . New organotin derivatives of P/As/Sb/Bi‐polyoxotungstates . Synth. React. Inorg. Met.‐Org. Chem. , 29 ( 6 ) : 951 – 965 .
   Google Scholar
• Tomşa , A. R. , David , L. , Crăciun , C. , Rusu , M. , Budiu , T. and Raţiu , C. 2000 . Spectroscopic studies of one sandwich‐type polyoxometalate with three cerium(III) ions . Bulg. J. Phys. , 27 ( 1 ) : 146 – 149 .
   Google Scholar
• Kuznetsova , L. I. , Kuznetsova , N. I. , Detusheva , L. G. , Fedotov , M. A. and Likholobov , V. A. 2000 . Active metal species assembled with heteropoly tungstate anion PW9O34 9− for liquid phase hydrocarbon oxidation . J. Mol. Catal. A (Chem.) , 158 ( 1 ) : 429 – 433 .
   Google Scholar
• Sun , Z. G. , Liu , Q. and Liu , J. 2000 . Organophosphoryl polyoxotungstates α‐[R2PW9O34]5− [R=PhP(S), C6H11P(O), H2NCH(n‐Pr)P(O)] . Trans. Met. Chem. , 25 ( 4 ) : 374 – 376 .
   Web of Science ®Google Scholar
• Wang , X. H. and Liu , J. 2000 . Synthesis and characterization of organotin substituted heteropolytungstophosphates and their biological activity . J. Coord. Chem. , 51 ( 1 ) : 73 – 82 .
   Web of Science ®Google Scholar
• Sun , Z. G. , Liu , Q. and Liu , J. 2000 . Synthesis and spectroscopic characterization of organophosphoryl polyoxotungstates of formula α‐A‐[RP(O)]2PW9O34 5− . Main Group Met. Chem. , 23 ( 3 ) : 189 – 191 .
   Web of Science ®Google Scholar
• Detusheva , L. G. , Kuznetsova , L. I. , Fedotov , M. A. , Likholobov , V. A. , Dovlitova , L. S. , Vlasov , A. A. and Malakhov , V. V. 2001 . Palladium(II), copper(II), iron(III), and vanadium(V) complexes with heteropolyanion PW9O34 9−: 31P, 183W, 51V NMR and IR spectroscopy studies . Russ. J. Coord. Chem. , 27 ( 12 ) : 838 – 845 .
   Web of Science ®Google Scholar
• Andres , H. , Clemente‐Juan , J. M. , Basler , R. , Aebersold , M. , Güdel , H. U. , Borras‐Almenar , J. J. , Gaita , A. , Coronado , E. , Büttner , H. and Janssen , S. 2001 . Magnetic polyoxometalates: anisotropic antiferro‐ and ferromagnetic exchange interactions in the pentameric cobalt(II) cluster [Co3W(D2O)2(CoW9O34)2]12−. A magnetic and inelastic neutron scattering study . Inorg. Chem. , 40 ( 8 ) : 1943 – 1950 .
   PubMed Web of Science ®Google Scholar
• Nomiya , K. , Takahashi , M. , Ohsawa , K. and Widegren , J. A. 2001 . Synthesis and characterization of tri‐titanium(IV)‐1,2,3‐substituted α‐Keggin polyoxotungstates with heteroatoms P and Si. Crystal structure of the dimeric, Ti‐O‐Ti bridged anhydride form K10H2[α,α‐P2W18Ti6O77]·17H2O and confirmation of dimeric forms in aqueous solution by ultracentrifugation molecular weight measurements . J. Chem. Soc. Dalton Trans. , 19 : 2872 – 2878 .
   Google Scholar
• Gaunt , A. J. , May , I. , Helliwell , M. and Richardson , S. 2002 . The first structural and spectroscopic characterization of a neptunyl polyoxometalate complex . J. Am. Chem. Soc. , 124 ( 45 ) : 13350 – 13351 .
   PubMed Web of Science ®Google Scholar
• Feng , J. , Sun , G. , Pei , F. and Liu , M. 2002 . Comparison between GdDTPA and two gadolinium polyoxometalates as potential MRI contrast agents . J. Inorg. Biochem. , 92 ( 3–4 ) : 193 – 199 .
   PubMed Web of Science ®Google Scholar
• He , J. , Chen , Y. , Wang , X. , Fang , X. and Liu , J. 2002 . Synthesis and crystal structure of dimeric, Na‐O‐Na bridged anhydride Na12H4[A‐β‐PW9O34Na(H2O)]2·38H2O . J. Mol. Str. , 641 ( 2–3 ) : 159 – 164 .
   Web of Science ®Google Scholar
• Roşu , C. , Rusu , M. and Ciocan , C. 2002 . Synthesis and characterization of a uranyl complex with a trilacunary Keggin ligand . Rev. Chim. , 53 ( 2 ) : 157 – 159 .
   Web of Science ®Google Scholar
• Kortz , U. , Mbomekalle , I. M. , Keita , B. , Nadjo , L. and Berthet , P. 2002 . Sandwich‐type phosphotungstates: Structure, electrochemistry, and magnetism of the trinickel‐substituted polyoxoanion [Ni3Na(H2O)2(PW9O34)2]11− . Inorg. Chem. , 41 ( 24 ) : 6412 – 6416 .
   PubMed Web of Science ®Google Scholar
• Fang , X. , Anderson , T. M. , Neiwert , W. A. and Hill , C. L. 2003 . Yttrium polyoxometalates. Synthesis and characterization of a carbonate‐encapsulated sandwich‐type complex . Inorg. Chem. , 42 ( 26 ) : 8600 – 8602 .
   PubMed Web of Science ®Google Scholar
• Niu , J. , Zhao , J. , Wang , J. and Li , M. 2003 . An organosilyl derivative of trivacant tungstophosphate. Synthesis, characterization and crystal structure determination of α‐A‐[nBu4N]3[PW9O34(C2H5SiO)3(C2H5Si)] . J. Mol. Str. , 655 ( 2 ) : 243 – 250 .
   Web of Science ®Google Scholar
• Niu , J. , Li , M. and Wang , J. 2003 . Organosilyl derivatives of trivacant tungstophosphate of general formula α‐A‐[PW9O34(RSiO)3(RSi)]3− Synthesis and structure determination by X‐ray crystallography . J. Organometallic Chem. , 675 ( 1–2 ) : 84 – 90 .
   Web of Science ®Google Scholar
• Gamelas , J. A. F. , Balula , M. S. , Carapuca , H. M. and Cavaleiro , A. M. V. 2003 . Unusual electrochemical reduction of copper(II) to copper(I) in polyoxotungstates . Electrochem. Comm. , 5 ( 5 ) : 378 – 382 .
   Web of Science ®Google Scholar
• Alizadeh , M. H. , Razavi , H. , Zonoz , F. M. and Mohammadi , M. R. 2003 . Synthesis, single‐crystal structural determination and solution characterization of a new sandwich‐type cadmium‐containing heteropolytungstate . Polyhedron , 22 ( 7 ) : 933 – 939 .
   Web of Science ®Google Scholar
• Anderson , T. M. , Neiwert , W. A. , Kirk , M. L. , Piccoli , P. M. B. , Schultz , A. J. , Koetzle , T. F. , Musaev , D. G. , Morokuma , K. , Cao , R. and Hill , C. L. 2004 . A late‐transition metal oxo complex: K7Na9[O:PtIV(H2O)L2], L=[PW9O34]9− . Science , 306 ( 5704 ) : 2074 – 2077 .
   PubMed Web of Science ®Google Scholar
• Agustin , D. , Coelho , C. , Mazeaud , A. , Herson , P. , Proust , A. and Thouvenot , R. 2004 . Organic‐inorganic hybrids based on polyoxometalates. Part 8. Synthesis and spectroscopic characterization of the heterosilylated anions [PW9O34(tBuSiO)3(SiR)]3− (R= –CH3, [sbnd]CH[dbnd]CH2, –CH2–CH[dbnd]CH2, –(CH2)4–CH[dbnd]CH2) — X‐ray crystal structure of [nBu4N]3[PW9O34(tBuSiO)3(SiCH2[sbnd]CH[dbnd]CH2)] . Z. Anorg. Allg. Chem. , 630 ( 12 ) : 2049 – 2053 .
   Web of Science ®Google Scholar
• Cabello , C. I. , Egusquiza , M. G. , Botto , I. L. and Minelli , G. 2004 . Heteropolyoxotungstates containing a wide catalytic target: Reducibility and thermal stability . Mater. Chem. Phys. , 87 ( 2–3 ) : 264 – 274 .
   Web of Science ®Google Scholar
• Jabbour , D. , Keita , B. , Mbomekalle , I. M. , Nadjo , L. and Kortz , U. 2004 . Investigation of multi‐nickel‐substituted tungstophosphates and their stability and electrocatalytic properties in aqueous media . Eur. J. Inorg. Chem. , : 2036 – 2044 .
   Web of Science ®Google Scholar
• Balula , M. S. , Gamelas , J. A. , Carapuca , H. M. , Cavaleiro , A. M. V. and Schlindwein , W. 2004 . Electrochemical behaviour of first row transition metal substituted polyoxotungstates: A comparative study in acetonitrile . Eur. J. Inorg. Chem. , 3 : 619 – 628 .
   Google Scholar
• Hussain , F. , Reicke , M. , Janowski , V. , de Silva , S. , Futuwi , J. and Kortz , U. 2005 . Some indium(III)‐substituted polyoxotungstates of the Keggin and Dawson types . C. R. Chim. , 8 ( 6–7 ) : 1045 – 1056 .
   Web of Science ®Google Scholar
• Weakley , T. J. R. 1997 . Potassium bis(α‐nonatungstoarsenato)diaquatetracobaltate(II) 23‐hydrate, K10[Co4(H2O)2(AsW9O34)2]·23H2O . Acta Cryst. , C53 ( 11 ) IUC9700025
   Google Scholar
• Bi , L. , Huang , R. , Peng , J. , Wang , E. , Wang , Y. and Hu , C. W. 2001 . Rational syntheses, characterization, crystal structure, and replacement reactions of coordinated water molecules of [As2W18M4(H2O)2O68]10− (M=Cd, Co, Cu, Fe, Mn, Ni or Zn) . J. Chem. Soc. Dalton Trans. , 2 : 121 – 129 .
   Google Scholar
• Wang , Y. , Hu , C. , Peng , J. , Wang , E. and Xu , Y. 2001 . Synthesis, characterization and x‐ray crystal structure of a novel polyoxotungstoarsenate: K6[{Cu(β‐Ala)2(H2O)2}2{Cu4(H2O)2(AsW9O34)2}]·17H2O (β‐Ala=β‐alanine) . J. Mol. Str. , 598 ( 2–3 ) : 161 – 169 .
   Web of Science ®Google Scholar
• Bi , L. H. , Liu , J. Y. , Shen , Y. , Jiang , J. G. and Dong , S. J. 2002 . Single‐crystal X‐ray structure and properties of K10[Ni4(H2O)2(AsW9O34)2]·4H2O . Synth. React. Inorg. Met. Org. Chem. , 32 ( 5 ) : 967 – 979 .
   Google Scholar
• Bi , L. H. , Zhou , W.‐H. and Mu , F. T. 2002 . Synthesis, characterization, crystal structure, and replacement reactions of coordinated water molecules of [(CeO)3(H2O)2(AsW9O34)2]12− . Synth. React. Inorg. Met.-Org. Chem. , 32 ( 6 ) : 1127 – 1140 .
   Google Scholar
• Mbomekalle , I. M. , Keita , B. , Nierlich , M. , Kortz , U. , Berthet , P. and Nadjo , L. 2003 . Structure, magnetism, and electrochemistry of the multinickel polyoxoanions [Ni6As3W24O94(H2O)2]17−, [Ni3Na(H2O)2(AsW9O34)2]11−, and [Ni4Mn2P3W24O94(H2O)2]17− . Inorg. Chem. , 42 ( 17 ) : 5143 – 5152 .
   PubMed Web of Science ®Google Scholar
• Rusu , D. , David , L. , Crăciun , C. , Pop‐Fanea , L. , Hossu , M. and Rusu , M. 2004 . Tetranuclear Cu(II) cluster encapsulated in one arsenic(V) heteropolyoxotungstate Spectroscopic and magnetic investigation . Acta Chim. Slovenica , 51 ( 4 ) : 629 – 640 .
   Web of Science ®Google Scholar
• Drewes , D. , Limanski , E. M. and Krebs , B. 2004 . Synthesis and crystal structure of the tetra‐nickel substituted [Ni4(H2O)2(AsW9O34)2]10− polyoxoanion . Z. Naturforsch., B: Chem. Sci. , 59 : 980 – 984 .
   Google Scholar
• Alizadeh , M. H. , Eshtiagh‐Hosseini , H. and Khoshnavazi , R. 2004 . Synthesis, structure, and characterization of a new sandwich‐type arsenotungstocerate, [As2W18Ce3O71(H2O)3]12− . J. Mol. Str. , 688 ( 1–3 ) : 33 – 39 .
   Web of Science ®Google Scholar
• Hussain , F. , Bi , L. , Rauwald , U. , Reicke , M. and Kortz , U. 2005 . Structure and solution properties of the cadmium(II)‐substituted tungstoarsenate [Cd4Cl2(B‐α‐AsW9O34)2]12− . Polyhedron , 24 ( 7 ) : 847 – 852 .
   Web of Science ®Google Scholar
• Pohl , M. , Lyon , D. K. , Mizuno , N. , Nomiya , K. and Finke , R. G. 1995 . Polyoxoanion‐supported catalyst precursors. Synthesis and characterization of the iridium(I) and rhodium(I) precatalysts [(n‐C4H9)4N]5Na3[(1,5‐COD)M·P2W15Nb3O62] (M=Ir, Rh) . Inorg. Chem. , 34 ( 6 ) : 1413 – 1429 .
   Web of Science ®Google Scholar
• Nikitina , E. A. and Tsvetkov , N. A. 1962 . Thermographic studies of isomers of ammonium luteophosphotungstates and β‐luteophosphotungstic acid . Zh. Neorgan. Khim. , 7 : 325 – 332 .
   Google Scholar
• So , H. and Pope , M. T. 1972 . Origin of some charge‐transfer spectra. oxo compounds of vanadium, molybdenum, tungsten, and niobium including heteropoly anions and heteropoly blues . Inorg. Chem. , 11 ( 6 ) : 1441 – 1443 .
   Web of Science ®Google Scholar
• Haraguchi , N. , Okaue , Y. , Isobe , T. and Matsuda , Y. 1994 . Stabilization of tetravalent cerium upon coordination of unsaturated heteropolytungstate anions . Inorg. Chem. , 33 ( 6 ) : 1015 – 1020 .
   Web of Science ®Google Scholar
• Rocchiccioli‐Deltcheff , C. , Thouvenot , R. and Franck , R. 1976 . Ir and Raman spectra of heteropolyanions with Keggin‐type structure, α‐XM12O40 n− [X=B(III), Si(IV), Ge(IV), P(V), As(V); M=W(VI), Mo(VI)] . Spectrochim. Acta , 32A ( 3 ) : 587 – 597 .
   Google Scholar
• Rocchiccioli‐Deltcheff , C. , Fournier , M. , Franck , R. and Thouvenot , R. 1983 . Vibrational investigations of polyoxometalates. 2. Evidence for anion‐anion interactions in molybdenum(VI) and tungsten(VI) compounds related to the Keggin structure . Inorg. Chem. , 22 ( 2 ) : 207 – 216 .
   Web of Science ®Google Scholar
• Tomşa , A. R. , Mureşan , L. , Koutsodimou , A. , Falaras , P. and Rusu , M. 2003 . Synthesis and characterisation of two new lanthanide sandwich‐type heteropolyoxometalates . Polyhedron , 22 ( 21 ) : 2901 – 2909 .
   Web of Science ®Google Scholar
• Venturelli , A. , Nilges , M. J. , Smirnov , A. , Belford , R. L. and Francesconi , L. C. 1999 . Synthesis and characterization of ReV, ReVI and ReVII complexes of the [α2‐P2W17O61]10− isomer . J. Chem. Soc. Dalton Trans. , : 301 – 310 .
   Google Scholar
• Tomşa , A. R. 2002 . “ Complexes of the trilacunary keggin polyoxometalates with F block metals or organation fragments ” . Cluj‐Napoca : Babeş‐Bolyai Univ . Ph.D. Thesis
   Google Scholar
• Maeda , K. , Himeno , S. , Osakai , T. , Saito , A. and Hori , T. 1994 . A voltammetric study of Keggin‐type heteropolymolybdate anions . J. Electroanal. Chem. , 364 ( 1–2 ) : 149 – 154 .
   Web of Science ®Google Scholar
• Xi , X. , Wang , G. , Liu , B. and Dong , S. 1995 . Electrochemical‐behavior of bis(2: 17‐arsenotungstate) lanthanates and their electrocatalytic reduction for nitrite . Electrochim. Acta , 40 ( 8 ) : 1025 – 1029 .
   Web of Science ®Google Scholar