Synthesis and characterization of zinc(II), copper(II) and cadmium(II) coordination polymers with tetrachloroterephthalate-based ligands |
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Authors: | Chang-Ge Zheng Song Li Pei-Pei Zhang Wan-Xia Wang Jian-Quan Hong Qian-Li Qian Xiu-Ying Chen |
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Institution: | (1) School of Chemical and Material Engineering of Jiangnan University, 214122 Wuxi, Jiangsu, People’s Republic of China |
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Abstract: | Three complexes, namely Zn(BDC-Cl4)(py)3 (1), Cu(BDC-Cl4)(py)3 (2) and Cd(BDC-Cl4)(py)3 (3) (BDC-Cl4 = 2,3,5,6-tetrachloro-1,4-benzenedicarboxylate, py = pyridine) have been synthesized. Complexes (1) and (2) have been obtained using solvothermal methods. Both have a five-coordinate geometry with two bridging monodentate tetrachloroterephthalate
ligands and three pyridine ligands coordinated to the Zn(II) or Cu(II) atom. The tetrachloroterephthalate ligands bridge the
adjacent Zn(II) or Cu(II) centers, giving zigzag chains. Complex (3) has also been crystallized, each Cd(II) atom is six-coordinated to three carboxylate oxygen atoms and three pyridyl nitrogen
atoms. Two types of tetrachloroterephthalate ligand, featuring monodentate and bidentate carboxylates, connect the Cd(II)
centers to form zigzag chains. All three complexes have been subjected to thermogravimetric analysis. |
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