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A new tungstoselenite, [H 2 SeW 18 O 60 ] 6− , was isolated under acidic medium conditions (pH=1.7)with the monoprotonated ethylamine as cation. It represents the first example of Se-containing polyoxometalate with unusual Dawson-like construction and has fully been characterized both in solid state and in solution. The high-resolution ESI-MS confirmed that the polyanion...
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