An open-framework rare-earth acetylenedicarboxylate: MIL-95, EuIII2(H2O)2(CO3)2.{O2C-C2-CO2}.{H2O}x

摘要: The first three-dimensional rare-earth acetylenedicarboxylate solid, MIL-95 (MIL = Material Institut Lavoisier), has been isolated and its structure solved from single-crystal X-ray diffraction data. Its two-dimensional inorganic subnetwork, built up chains of edge-sharing nine-coordinated europium-capped square antiprisms carbonate moieties, is pillared by the groups. This leads to an open framework where small pores are filled with water molecules interacting terminal bound metal centers. TGA thermodiffractometry show that dehydration irreversible pore contraction. whole collapses above 230 °C. Crystal data for MIL-95:  orthorhombic space group Pba2 (No. 32), a 7.6762(2) A, b 17.8448(4) c 4.8105(2) A.