Two new polyoxovanadate clusters templated through cysteanilne

Two new fully oxidized polyoxovanadate cluster-based solids (C4N2S2H14)(2)[H2V10O28]center dot 4H(2)O, 1 and (C4N2S2H14)(5)[H4V15O42](2)center dot 10H(2)O, 2 are crystallized under self-assembly process in the presence of cysteamine. In both 1 and 2, cysteamines are oxidized forming disulphide linkages and occur as counter cations. The organic cations assemble around V10O28 cluster anions in I whereas they aggregate around V15O42 clusters in 2. pH appears to be the structure determinant in the occurrence of decavanadate cluster in I and pentadecavanadate in 2, with the same counter cation.