A formate bridged Ni(II) sheet and its 3D analogue in presence of a linear organic linker: Synthesis,crystal structure and magnetic properties |
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| Authors: | Oindrila Sengupta Bappaditya GolePartha Sarathi Mukherjee |
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| Institution: | Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore 560 012, India |
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| Abstract: | Reaction of formamide with Ni(NO3)2·6H2O under hydrothermal condition in a mixture of MeOH/H2O forms a two-dimensional formate bridged sheet Ni(HCOO)2(MeOH)2 (1). X-ray structure analysis reveals the conversion of formamide to formate which acts as a bridging ligand in complex 1 where the axial sites of Ni(II) are occupied by methanol used as a solvent. An analogous reaction in presence of 4,4′-bipyridyl (4,4′-bipy) yielded a three-dimensional structure Ni(HCOO)2(4,4′-bpy) (2). DC magnetic measurements as a function of temperature and field established the presence of spontaneous magnetization with Tc (Curie temperature) = 17 and 20.8 K in 1 and 2, respectively, which can be attributed due to spin-canting. DFT calculations were performed to corroborate the magnetic results of 1 and 2. |
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| Keywords: | Ni complex Formate X-ray DFT calculation Coordination polymer |
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