文摘
Five new polyoxovanadate-based cluster compounds, (Et4N)4[HV15O39(acac)Cl]·3CH3CN (1), (Et4N)5[V16O40X] (X = Br 2a; X = Cl 2b), (Me2NH2)8[H2V16O42(ClO4)]·4H2O (3), and (Me2NH2)2(Et4N)2[H2V10O28] (4), having different types of vanadium oxide shells are isolated in organic media. Compounds 1−3 are hollow structures with different encapsulated anions in their centers. The surfaces of four compounds are constituted by vanadium and oxygen atoms, showing large 10-membered -O−V−O−V- rings and/or eight-membered -O−V−O−V- rings, which distinguish vanadium-oxide clusters from the common hollow clusters built up with closed surfaces.