Characterization and magnetic properties of two novel copper(II) coordination polymers prepared by different synthetic techniques |
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| Affiliation: | 1. Department of Inorganic Chemistry, Faculty of Science, P. J. ?afárik University, Moyzesova 11, SK-041 54 Ko?ice, Slovak Republic;2. Department of Physics, Faculty of Science, P. J. ?afárik University, Park Angelinum 9, SK-041 54 Ko?ice, Slovak Republic;3. Department of Inorganic Chemistry, Faculty of Science, Charles University, Hlavova 2030/8, CZ-128 43 Prague 2, Czech Republic;1. College of Chemistry and Environmental Engineering, Sichuan University of Science & Engineering, Zigong 643000, PR China;2. Institute of Functional Materials, Sichuan University of Science & Engineering, Zigong 643000, PR China;3. School of Pharmacy, Guangdong Medical University, Dongguan 523808, PR China;4. School of Chemistry, Monash University, Victoria 3800, Australia;5. Department of Chemistry, Faculty of Science, King Abdulaziz University, Jeddah, Saudi Arabia;6. Department of Chemistry, Faculty of Science, University of Lucknow, Lucknow 226 007, India |
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| Abstract: | Two novel ternary Cu(II) coordination polymers with formulas {Cu(μ2-AZPY)(H2BTC)2]}n (1) and {Cu(μ2-AZPY)(μ2-HBTC)(H2O)]·AZPY}n (2) (AZPY – trans-4,4′-azobis(pyridine), BTC – benzene-1,3,5-tricarboxylate) have been synthesized using the solvothermal or diffusion techniques, respectively. Compounds were characterized by single crystal X-ray diffraction, thermogravimetry, infrared spectroscopy, elemental analysis and AAS. Removal of water and AZPY from the framework of 2 was investigated by wide-angle X-ray scattering measurements during in-situ heating. A magnetic study showed on antiferromagnetic coupling in 1 and 2 and magnetic properties may be influenced by both crystal field (CF) and inter-molecular interactions. The effective magnetic moment decreases from the values μeff = 4.97 μB for 1 and μeff = 3.39 μB for 2 at T = 290 K to the values of μeff = 1.41 μB for 1 and μeff = 1.27 μB for 2 at T = 2 K. The origin of the observed behavior is discussed. |
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