Poly[sodium [μ₄-2-hydroxyphosphonoacetato(3−)]iron(II)]

Abstract

CommentMetal phosphonates with rich composition and structural diversity have attracted considerable attention during the past few years due to their potential applications in catalysis (Clearfield, 1996), ion exchange (Alberti et al., 1999), proton

Layered-Columnar Cathode Materials for Sodium-Ion Batteries

“…The structure of NaFe[O 3 PCH(OH)CO 2 ] 21 formed by the phosphoryl organic and Fe 2+ ions is shown in 1b, the calculated XRD diffraction peaks of the purple line are highly consistent with the reported PXRD diffraction peaks of the black line 21,23 . The calculated three strongest diffraction peaks at 19.95°, 30.42° and 31.97° correspond to the crystal planes (021), (222), and (213), respectively, while the experimental PXRD showed these peaks shifted to 19.98°, 30.19°, and 31.62°.…”

Structural Mapping and Framework Interconversions in 1D, 2D, and 3D Divalent Metal R,S-Hydroxyphosphonoacetate Hybrids

“…Anionic frameworks with fully deprotonated trianionic HPAA 3− have been reported with divalent metal ions. ,, In these structures an extra organic or inorganic cation is also incorporated for charge balance. The inclusion of Na + as charge-compensating cation into the anionic framework has led to a series of isomorphous orthorhombic 3D compounds, NaM{O 3 PCH(OH)CO 2 } (M = Mn, Fe, Co, Zn), MNa-L-0-0-3D , obtained by hydrothermal syntheses. The resulting frameworks incorporate the alkali metal ions as a compensation for the increase in the M/P molar ratio and also for the increased pH above 4.0 (for instance by the presence of an acetate buffer).…”

“…Yet, rational design of the synthesis of metal phosphonates, M n + -HPAA, is not an easy task because of a large number of experimental factors that must be precisely controlled. One-dimensional (1D), two-dimensional (2D), , and three-dimensional (3D) ,,, materials based on the HPAA ligand have been reported. Generally, reactions of hydrated metal salts and HPAA at low pH (ca.…”

“…The presence of additional cation species usually leads to 3D structures. A number of M(II)-HPAA frameworks of this type are known, namely, [(NH 4 )Zn{O 3 PCH(OH)CO 2 }], [Na 2 Cd 2 {O 3 PCH(OH)CO 2 } 2 (H 2 O) 3 ]·2H 2 O, Mg 0.5 Cd{O 3 PCH(OH)CO 2 }, [(enH 2 ) 0.5 Co{O 3 PCH(OH)CO 2 }(H 2 O)]·H 2 O, en = ethylenediamine), and NaM{O 3 PCH(OH)CO 2 } (M = Mn, Fe, Co, Zn). , It must be noted that anionic metal-phosphonate complexes can be formed in solution prior to precipitation and, hence, at high pH values, additional monovalent cations may be needed to neutralize the charge. Until now, no comprehensive studies to determine the influence of the added base have been reported.…”