Abstract
Five new transition metal coordination polymers: [Cu2L(4,4′-bipy)(H2O)0.5] (1), [Cu(H2L)H2O] (2), [Cd2(H2L)2H2O] (3), [Co2L(H2O)2]·0.184H2O (4), [Fe3L2(OH)(H2O)3]·2H2O (5) (H4L = 4-CH3-C6H4CH2N(CH2PO3H2)2), were obtained through hydrothermal reactions. The complexes have been characterized by IR, elemental analysis, TGA and XRD. Crystal structure analysis reveals that all of 2–5 contain 2D inorganic layer structures, constructed by the coordination interactions between metal ions and phosphonate oxygen atoms. 4,4′-bipy molecules in 1 act as a bridging ligand to connect the adjacent 2D layers into a 3D framework. Moreover, magnetic properties of the complexes have been quantificationally investigated by the classical spin approximation and PHI software program, revealing that 2, 4 and 5 exhibit antiferromagnetism, while 1 shows ferromagnetism.
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