Nagaraja, C. M. ; Maji, Tapas Kumar ; Rao, C. N. R. (2012) Synthesis, structure and magnetic properties of two organically-templated coordination polymers, {[EDAH2][M1M2F2(SO4)2(H2O)2]}n (M1=M2=NiII and M1=CoII, M2=NiII) Inorganica Chimica Acta, 389 . pp. 85-89. ISSN 0020-1693
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Official URL: https://www.sciencedirect.com/science/article/pii/...
Related URL: http://dx.doi.org/10.1016/j.ica.2012.01.060
Abstract
Two isostructural, organically-templated, 2D coordination polymers, one containing NiII and another containing CoII and NiII ions with the general formulae, {[EDAH2][M1M2F2(SO4)2(H2O)2]}n, (EDA = ethylenediamine, M1 = M2 = NiII (1), and M1 = CoII, M2 = NiII (2)) have been synthesized and structurally characterized. 1 and 2 consist of a 1D chain bridged by F- ion, [M-F-M]n which is interconnected by SO42− tetrahedra forming a 2D [Ni2F2(SO4)2(H2O)2]n2− or [CoNiF2(SO4)2(H2O)2]n2− corrugated sheet which are templated by diprotonated ethylenediamine [EDAH2] cation. Temperature-dependent magnetic measurements reveal the presence of spin-canted antiferromagnetism in both 1 and 2. 1 behaves like a soft magnet with a small magnetic hysteresis with a coercive field (Hc) of 0.46 kOe and a remnant magnetization (MR) of 0.09 µB. 2, on the other hand exhibits relatively a hard magnet like behavior with large magnetic hysteresis with Hc = 8.74 kOe and MR = 0.76 µB. The difference in magnetic behaviors of 1 and 2 is attributed to the difference in single-ion magnetic anisotropy and spin magnitudes of NiII (S = 1) and CoII (S = 3/2) ions.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Elsevier Science. |
| Keywords: | Nickel(II) Compound; Cobalt(II) Compound; Mixed Metal System; Coordination Polymer; Magnetic Properties; Canted-Antiferromagnet |
| ID Code: | 114512 |
| Deposited On: | 30 May 2018 10:06 |
| Last Modified: | 30 May 2018 10:06 |
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