The novel 3D edta-linked heterometallic complex [Sb2Er(edta)2(H2O)4]NO3Ã?·4H2O (H4edta ethylenediaminetetraacetic acid)\nwas synthesized and characterized by elemental analyses, single-crystal X-ray diffraction, powder X-ray diffraction (XRD), Fourier\ntransform infrared spectroscopy (FTIR), and thermal analysis.Thecomplex crystallizes in the monoclinic system with space group\nPm. In the complex, each erbium(III) ion is connected with antimony(III) ions bridging by four carboxylic oxygen atoms, and in\neach [Sb(edta)]âË?â?? anion, the antimony(III) ion is hexacoordinated by two nitrogen atoms and four oxygen atoms from the edta4âË?â??\nions, together with a lone electron pair at the equatorial position. The erbium(III) ion is octacoordinated by four oxygen atoms\nfrom four different edta4âË?â?? ions and four oxygen atoms from the coordinated water molecules. The carboxylate bridges between\nantimony and erbium atoms form a planar array, parallel to the (1 0 0) plane. There is an obvious weak interaction between\nantimony atom and oxygen atom of the carboxyl group from the adjacent layer. The degradation of the complex proceeds in\nseveral steps and the water molecules and ligands are successively emitted, and the residues of the thermal decomposition are\nantimonous oxide and erbium(III) oxide. The complex was evaluated for its antimicrobial activities by agar diffusion method, and\nit has good activities against the test bacterial organisms.
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