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ABSTRACT
(CeO)3(AsW9O34)2ċ2H2O12− was synthesized by the reaction of A-AsW9O34 9− with Ce(IV). The product was well characterized by IR, UV, 183W NMR spectra and elemental analyses. The structure of K5Na4H3[(CeO)3(H2O)2-(AsW9O34)2]ċ11H2O has been solved by X-ray diffraction. The structure comprises a belt of three oxygen atoms alternating with the three cerium atoms encapsulated between two fragments of the trivacant Keggin polyanions A-AsW9O34 9−. Its structure is similar to that of the analogue phosphorus derivative. The experimental results show that many ligands, [Fe(CN)6]4−, [Fe(CN)6]3−, SO3 2−, SCN-, etc. can replace the coordinated water molecules in aqueous solution resulting in characteristic colors of the solutions.
ACKNOWLEDGMENTS
This work was supported by the National Science Foundation and the Science and Technology Committee Foundation of Jilin Province of China.