Spectral, thermal, structural and microhardness studies of tetraaquabis(malonato)cadmium(II)copper(II): A new three-dimensional heterobimetallic framework system

• Dicarboxylate ligand.
• Gel diffusion technique.
• 3D heterobimetallic framework system.
• Bulk purity of the crystal was checked.
• Open channel appears by the removal of coordinated water molecules.
• Hydrogen bonding increases the stability of unit cell packing.
• Thermal decomposition behavior analyzed by TG.
• Mechanical strength of the crystal tested by microhardness studies.

A new three-dimensional heterobimetallic metal–organic framework system tetraaaquabis(malonato)cadmium(II)copper(II) (TMCC) containing Cd(II) and Cu(II) as metal centers, was grown successfully by single gel diffusion technique at room temperature. Blue colored rectangle shaped crystals have been obtained within 15 days. The crystalline nature and reflection planes of the sample were confirmed by the powder X-ray diffraction studies and bulk purity of the crystal was also checked. The crystal structure was determined by single crystal X-ray diffraction studies. By removing the coordinated water molecules the framework would have a channel with open window about 6.7 × 6.2 Å along the c axis. FT-IR spectral studies were used to confirm the presence of various functional groups and the bidendate coordination of the ligand to the metal ions. The electronic transitions in the compound were analyzed by UV–Vis spectral studies. The thermal behavior of the crystal was studied by TG in nitrogen atmosphere. The mechanical strength of the grown crystal was estimated by Vickers microhardness test.

A new three-dimensional heterobimetallic framework system, tetraaquabismalonatocadmium(II)copper(II) was grown using gel diffusion technique at room temperature. CHN and ICP-AES analysis, FT-IR and UV–Vis spectral studies, powder XRD, TGA and microhardness studies of the compound have been carried out. By removing the coordination water molecules there would be a channel with open window about 6.7 × 6.2 Å along ‘c’ axis. Figure optionsDownload as PowerPoint slide