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Synthesis,structures, sorption and magnetic properties of coordination polymers based on 3d metal pivalates and polydentate pyridine-type ligands |
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| Authors: | R A Polunin N P Burkovskaya S V Kolotilov M A Kiskin A S Bogomyakov S A Sotnik I L Eremenko |
| Institution: | 1. L. V. Pisarzhevskii Institute of Physical Chemistry, National Academy of Sciences of Ukraine, 31 prosp. Nauki, 03028, Kiev, Ukraine 2. N. S. Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, 31 Leninsky prosp., 119991, Moscow, Russian Federation 3. International Tomography Center, Siberian Branch of the Russian Academy of Sciences, 3a ul. Institutskaya, 630090, Novosibirsk, Russian Federation |
| Abstract: | The reactions of 3d metal pivalates with pyridine-containing ligands of different structures afforded the 1D coordination polymers Co2(Piv)4(dpe)2] n , Ni(Piv)2(dpe)(EtOH)2] n , Cu2(Piv)4(dpe)] n , Cu(Piv)2(dpe)] n , Ni(Piv)2(4-ptz)(EtOH)2] n , and Cu2(Piv)4(4-ptz)· ·mSolv] n (Solv is EtOH, m = 2; Solv is C6H6, m = 1; Piv? is pivalate, dpe is trans-1,2-bis(4-pyridyl)ethylene, 4-ptz is 2,4,6-tris(4-pyridyl)-1,3,5-triazine), as well as the 3D coordination polymer {Cu2(Piv)4}3(3-ptz)2] n (3-ptz is 2,4,6-tris(3-pyridyl)-1,3,5-triazine). The sorption and magnetic properties of a series of the synthesized compounds and magnetic properties of the earlier characterized coordination polymer Mn2(O2CC6H5)4(dpe)2·dpe] n were studied. It was shown that the desolvation of the complexes Ni(Piv)2(4-ptz)(EtOH)2] n and Cu2(Piv)4-(4-ptz)·2EtOH] n resulted in the formation of the crystal structures, in which the pores are accessible to nitrogen and hydrogen at 78 K (S BET are up to 92 m2 g?1). The temperature dependences of the molar magnetic susceptibility for Co2(Piv)4(dpe)2] n , Mn2(O2CC6H5)4-(dpe)2·dpe] n , Ni(Piv)2(dpe)(EtOH)2] n , Ni(Piv)2(4-ptz)(EtOH)2] n , and Cu2(Piv)4-(4-ptz)·2EtOH] n are described in terms of models taking into account the zero-field splitting and exchange interactions or isotropic exchange Hamiltonians. |
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