Hydrothermal synthesis and crystal structure of a novel three-dimensional mixed-valence iron coordination polymer [Fe2FeO2(IN)2(ox)] (IN=isonicotinate, OX=oxalate) |
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Authors: | Li-Yun Feng Yong-Hui Wang Chang-Wen Hu Yang-Guang Li En-Bo Wang |
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Affiliation: | a Institute of Polyoxometalate Chemistry, Faculty of Chemistry, Northeast Normal University, Changchun 130024, People's Republic of China b Department of Chemistry, Beijing Institute of Technology, Beijing 100081, People's Republic of China |
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Abstract: | A novel three-dimensional (3D) mixed-valence iron coordination polymer [Fe2IIIFeIIO2(IN)2(ox)] (IN=isonicotinate, OX=oxalate) (1) has been hydrothermally synthesized by using two different anionic ligands and characterized by elemental analysis, IR spectrum, electron spin resonance (ESR), X-ray photoelectron spectrum (XPS), thermogravimetric analysis (TGA) and single crystal X-ray diffraction. Compound 1 crystallizes in the monoclinic, space group P2(1)/c with a=5.8774(7) Å, b=18.528(2) Å, c=7.7117(9) Å, V=817.69(17) Å3, Z=2, and R1=0.0321 (wR2=0.0777). The Fe(II) and Fe(III) centers in 1 both exhibit a distorted octahedral coordination geometry and are bridged by the IN and oxalate groups into a covalently bonded 3D metal–organic network. TGA showed that the 3D network possesses a good stability up to 291 °C. |
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Keywords: | Iron coordination polymer Hydrothermal synthesis Crystal structure Isonicotinate Oxalate |
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