Synthesis, characterization and dye adsorption properties of a 3-fold interpenetrated cobalt(II)-metal organic framework based on (E)-5,5'-(but-2-ene-1,4-diylbis(oxy))diisophthalate and 1,4-bis(imidazole-1-yl)butane ligands

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作者
Çiftçi, Esengül [1 ]
Alp Arıcı, Tuğba [2 ]
Arıcı, Mürsel [1 ]
Erer, Hakan [1 ]
Yeşilel, Okan Zafer [1 ]
机构
[1] Department of Chemistry, Faculty of Science and Letters, Eskişehir Osmangazi University, Eskişehir,26040, Turkey
[2] Department of Chemical Technology, Emet Vocational School, Kütahya Dumlupınar University, Kütahya,43700, Turkey
关键词
5,5'-(but-2-ene-1,4-diylbi(oxy))diisophthalate complex - Adsorption ability - Adsorption properties - Coordination Polymers - Coordination-polymers - Dyes adsorptions - Metalorganic frameworks (MOFs) - Methylene Blue - Methylene blue removal - Synthesised;
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摘要
A new 3D cobalt(II)-metal organic framework, [Co2(μ4-L)(μ-bib)2]n (1) was synthesized with solvothermal method by using (E)-5,5'-(but-2-ene-1,4-diylbis(oxy))diisophthalic acid (H4L) and 1,4-bis(1H-imidazole-1-yl)butane (bib) in the presence of cobalt(II) ion. Compound 1 was characterized by elemental analysis, FTIR spectroscopy and single crystal X-ray diffraction (SCXRD) technique. SCXRD analysis result revealed that 1 displayed a 3-fold interpenetrated 3D framework with bbf topology. The dye adsorption ability of 1 towards methylene blue (MB) was assessed with diverse parameters (pH, the compound amount, temperature, contact time and initial MB concentration). Adsorption kinetics and isotherms fitted well with pseudo-second-order kinetic and Langmuir isotherm models. The highest adsorption capacity of compound 1 was 473.57 ​mg ​g−1 ​at pH ​= ​8.0, 20 ​°C. The adsorption ability could be due to the electrostatic interactions between cationic MB and negative charge density on 1 ​at pH ​= ​8.0. Overall, adsorption studies indicated that synthesized compound 1 may be an efficient alternative adsorbent for MB removal from aqueous solutions. © 2022 Elsevier Inc.
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