| On the basis of molecular design and assembly, the polyoxometalate compounds supported by Keggin. trivacant Keggin as building blocks were successfully synthesized by the ambient-temperature aqueous solution(or mixed solvent)and the middle temperature hydrothermal reactions, by virtue of metal-organic coordination ions as bridging ligands, and characterized by X-ray crystallography, spectroscopy.(1) The sandwich bismuth tungstate linked by Cu or Mn interlayer: [Na(H2O)4.5]4[Cu2W2(OH)2(H2O)8(BiW9O33)2]2NaCl·16H2O, Monoclinic system, P2(1)/n spacegroup. a = 12.851(3)(?). b = 25.056(5)(?), c=16.039(3)(?),α=90°,β=95.10(3)°,γ=90 (10)°.Z=2, R1 = 0.0676. wR2 = 0.1352;Na(,[Na2(H2O)6(OH)]2[Mn3W(OH)2(H2O)8(BiW9O33)2]·12H2O, Monoclinic system, P2(1)/n spacegroup, a=12.834(3) (?), b=25.047(5) (?), c=19.620(6) (?),α=90°,β=125.60(2)°,γ=90 (10)°,Z=2, R1=0.0767. wR2=0.1698(2) rare-earth metal organic-inorganic compounds supported by the Keggin Polyanion [PW12O40]3-were synthesized. C12 H24 N4 O31.33 P0.67 Pr0.67 W8 Monoclinic system , P2(1)/n spacegroup a=23.093(14) (?). b=12.749(8)(?). c=22.177(13)(?).α=90°,β=101.387(8)°,γ=90 (10)°.Z=6, R1= 0.0671. wR2 = 0.1388.
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