Two Modifications of Layered Cobaltous Terephthalate: Crystal Structures and Magnetic Properties

Synthesis, Crystal Structure, and Magnetic Properties of Mn2(OH)2SO4: A Novel Layered Hydroxide

“…In a few cases, the structures have been determined by Rietveld refinement of high-quality powder diffraction data. [8,9] Fur-antiferromagnetic (T Né el = 42±1 K) behavior consistent with the linear dependence of the magnetization as a function of the field at 2 K, which reaches only 0.4 µ B at 50 kOe, and the lack of any imaginary component of the ac-susceptibilities (ac = alternating current).…”

“…This is similar to that observed for M 2 (OH) 2 C 2 O 4 (M ϭ Mn or Co), and for Co 2 (OH) 2 (terephthalate) where, in both cases, the hydroxide ions are both µ 3 -bridging and the carboxylate ion forms six bonds with [21] the surrounding metal atoms. [9,16] Such a µ 6 -coordination for the sulfate is rare (Figure 3), it is commonly found as an independent anion, or displaying single-, µ 2 -, µ 3 -or µ 4 -coordination. …”

“…[10] These structures are only observed for Zn and Co since both metals adopt a four-coordinate geometry. A more exotic layer topology can be found for Co 2 (OH) 2 (terephthalate), [9] which adopts a topology similar to the 110 planes of normal rutile, i.e. consisting of edge-sharing chains of octahedra connected to similar chains through the apices of the octahedra with the layers being interleaved by the bridging dianionic terephthalate.…”

One-pot synthesis of a metal–organic framework as an anode for Li-ion batteries with improved capacity and cycling stability

“…Co 2 (OH) 2 BDC has been synthesized by Kurmoo et al employing three different solution chemistry methods [30]. However, due to the insolubility of terephthalic acid and its salt, the synthesis should be carried out in dilute solution and the product is not well-crystallized.…”

“…More importantly, 1,4-benzenedicarboxylic acid, as a starting material, is available in abundance from the recycling of polyethylene terephthalate and the metabolites of aromatic hydrocarbon oxidation, meeting the requirements of future large scale applications [19]. Among these 1,4-benzenedicarboxylate based MOFs, a 3D framework, namely, Co 2 (OH) 2 by Kurmoo et al and investigated as a molecular metamagnet with a complex magnetic structure in the year of [30]. The structure of the framework consists of two types of edge-sharing CoO 6 chains that are connected to each other by the μ 3 -OH to form layers that are further linked together by terephthalate bridges.…”