Hydrothermal syntheses, crystal structures and characterizations of three new copper coordination polymers |
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Authors: | Yi-Hang Wen Jian-Kai Cheng Jian Zhang Zhao-Ji Li |
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Institution: | a State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, PR China b Institute of Physical Chemistry, Zhejiang Normal University, Jinhua, Zhejiang 321004, PR China c Graduate School of the Chinese Academy of Sciences, Beijing 100039, PR China |
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Abstract: | Three new copper complexes, CuIICuI(ip)(ipH)(4,4′-bipy)3/2]n (1), Cu(ip)(4,4′-bipy)]n · 3nH2O (2), and Cu(ipH)2(4,4′-bipy)]n (3), have been hydrothermally synthesized by the reaction of Cu(NO3)2 · 3H2O with isophthalic acid (ipH2) and 4,4′-bipyridine (4,4′-bipy) under different reaction conditions. Complex 1, a mixed-valence copper(I,II) complex, exhibits a 2-D interpenetrating grid framework, in which five-coordinated CuII and three-coordinated CuI environments are established. The oxidation states of center Cu atoms have been confirmed by X-ray photoelectron spectroscopy (XPS) and electron paramagnetic resonance spectra (EPR). Complex 2 features a 2-D box-like bilayer architecture, in which CuII atoms are linked by ip ligands to form a 1-D double-chain and the resulting chains are further strutted by the 4,4′-bipy ligands. In complex 3, two bridging 4,4′-bipy ligands and two terminal ipH ligands confine the CuII center in a square plane coordination geometry. The whole molecule of 3 was arranged into a 1-D linear chain structure. Additionally, the thermogravimetric analyses (TGA) for complexes 1-3 are also discussed in this paper. |
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Keywords: | Hydrothermal synthesis Reaction condition Coordination architecture Mixed ligand Copper complex |
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