Syntheses, Crystal Structures and Magnetic Properties of Co(II) Coordination Polymers Based on a Rigid Imidazole Derivative

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• 作者：Wu-Juan Sun ; Cong-Yu Ke ; Qun-Zheng Zhang…
• 关键词：Crystal structure ; 1 ; 4 ; Bis(imidazol ; 1 ; yl) benzene ; Supramolecular framework ; Magnetic properties
• 刊名：Journal of Inorganic and Organometallic Polymers and Materials
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：27
• 期：1
• 页码：186-193
• 全文大小：
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Inorganic Chemistry; Organic Chemistry; Polymer Sciences;
• 出版者：Springer US
• ISSN：1574-1451
• 卷排序：27

文摘

Two new Co(II)-based coordination polymers, [Co(bib)(SO₄)(H₂O)₂]_n·nH₂O (1) and [Co(bib)(bptc)_0.5(H₂O)₂]_n (2) [bib = 1,4-bis (imidazol-1-yl) benzene, H₄bptc = 3,3′,5,5′-biphenyltetracarboxylic acid] have been successfully synthesized under solvothermal conditions. Their structures have been determined by single-crystal X-ray diffraction analysis and further characterized by elemental analysis, IR spectra, X-ray powder diffraction and thermogravimetric analysis. The structure analysis reveals that complex 1 exhibits a novel one-dimensional double chain with μ-O atom of SO₄2− anion bridging the 1D [Co(bib)]_∞ chain, while complex 2 shows a 2D (4, 4) net work with deprotonated H₄bptc links 1D [Co(bib)]_∞ chain. The organic carboxylic acid competes with inorganic acid on the architectures of Co(II) coordination polymers. Furthermore, magnetic properties of 1 and 2 are measured and show antiferromagnetic characters.