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Three dimensional metal-malonate frameworks with pillared layered architecture: Unusual role of metal-chelate as pillar |
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| Authors: | Biswajit Dey Somnath Ray Choudhury Li-Ping Lu Subrata Mukhopadhyay |
| Institution: | a Department of Chemistry, Jadavpur University, Kolkata 700 032, India b Department of Physics, Sripat Singh College, Jiaganj, Murshidabad, West Bengal 742 123, India c Institute of Molecular Science, Key Laboratory of Chemical Biology and Molecular Engineering of the Education Ministry, Shanxi University, Taiyuan, Shanxi 030006, PR China |
| Abstract: | One hetero-bimetallic Cu(II)/Cd(II) compound, CdII(H2O)2]CuII(mal)2(H2O)2]n (1) (H2mal = malonic acid) has been synthesized and characterized using single crystal X-ray crystallography, thermogravimetric (TG) studies and X-ray powder diffraction (XRPD) measurements. The compound crystallizes in orthorhombic Pbcn space group having cell dimensions a = 6.6260(12) Å, b = 13.958(2) Å and c = 13.052(2) Å. The solid state structure of compound 1 demonstrates a 3D pillared layered coordination network generated through the simultaneous bridging as well as chelating mode of malonate towards the Cd(II) and Cu(II), respectively. TG analysis reveals relatively high thermal stability for the compound (decomposition temperature ∼320 °C). The thermal study also reveals that the coordinated waters attached to both the metal centers (Cd(II) and Cu(II)) are reversibly lost and gained and this behavior is also corroborated by XRPD studies. |
| Keywords: | Self-assembly Water Pillared layered architecture Hetero-bimetallic Cu(II)/Cd(II) compound Malonate |
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