Inorganic–organic hybrid high-dimensional polyoxotantalates and their structural transformations triggered by water.

The first two inorganic–organic hybrid three-dimensional (3D) polyoxotantalates (POTas) and the first two inorganic–organic hybrid 2D POTas have been obtained. All of these high-dimensional POTas are built from a new-type POTa dimeric cluster {Cu(en)(Ta₆O₁₉)}₂/{Cu(enMe)(Ta₆O₁₉)}₂ (en = ethylenediamine, enMe = 1,2-diaminopropane) bridged by copper complexes. Interestingly, extended POTas 1 and 3 can undergo single-crystal to single-crystal structural transformations triggered by water. [ABSTRACT FROM AUTHOR]