Fabrications of some kinds of 2-D frameworks consisting of nanosized polyoxomolybdate anion [Mo36O112(H2O)16]8− via condensation processes

We succeeded to prepare novel [Mo36O112(H2O)16]8− ({Mo36}) compounds by using 1,3-diamino-2-propanol (βOHC3-DA) and 1,3,5-tris(aminomethyl)benzene (MES-TA)+1,3-diaminopropane (C3-DA) as linkers, and determined their crystal structures. We have confirmed they have unique two-dimensional (2-D) molybdenum oxide frameworks, which are formed by condensation of {Mo36}s. Side-staggered arrays of {Mo36}s, connected in lying position by eight bridges per a {Mo36}, are formed in the compound with βOHC3-DA, while herringbone arrays of {Mo36}s, connected in standing position by four bridges per a {Mo36}, are built in the compound with MES-TA+C3-DA. The latter compound exhibited non-stoichiometric property, and its composition and cell parameters varied depending on the relative concentration of MES-TA in the mother solution.

Graphical abstractThe image shows a variety of 2-D molybdenum oxide frameworks consisting of nanosized polyoxometalate anion [Mo36O112(H2O)16]8− ({Mo36}), obtained by our fabrication techniques. The variations are expected to provide diversity in physical properties of the frameworks.Figure optionsDownload full-size imageDownload as PowerPoint slide