Polyoxometalate cluster V12B18O60H6 functionalized with the copperII bis-ethylenediamine complexReport as inadecuate




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Three compounds based on the polyoxometalate building block V12B18O60H6, Na10H2OV12-B18O60H6 18H2O 1, Na8Cuen22V12B18O60H6NO32 14.7H2O 2, Na7Cuen22V12B18O60H6NO3 15.5H2O 3, en = ethylenediamine, have been hydrothermally synthesized and characterizedby single-crystal X-ray diffraction analysis and TGA. Compound 1 consists of polyoxovanadium borateV12B18O60H6 clusters which are surrounded by sodium countercations in octahedral sites, stabilizedby electrostatic interactions with the oxygen atoms of both vanadium and boron centres. However, compounds2 and 3 correspond to more complicated structures, constructed from the same polyoxometalateclusters, which are interconnected by Cuen22+ moieties via the terminal oxygen atoms of the polyoxoanions,generating one-dimensional structures. The functionalization of this polyoxovanadium boratecluster has been obtained by the use of Cuen22+ complex ions, thus demonstrating the capacity of theterminal oxygen atoms of the cluster to bind transition metal centres. The structural stability of theV12B18O60H6 cluster permits the formation of functionalized polyoxometalate clusters, generatingvarious crystalline lattices.



Author: Brown, Kareen; - Car, Pierre Emmanuel; - Vega, Andrés; - Venegas Yazigi, Diego; - Paredes García, Verónica; - Vaz, María G.F.

Source: http://repositorio.uchile.cl/



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