Amino-Functionalized Layered Crystalline Zirconium Phosphonates: Synthesis, Crystal Structure, and Spectroscopic Characterization

Crystal structure of poly[triaqua-(di(2,2′-bipyridine-κ2 N,N′)-μ4-silanetetrayltetrakis(benzene-4,1-diyl)tetrakis (hydrogen phosphonato)-κ4 O:O′:O′′:O′′′) dicadmium(II)], C44H42N4O15P4Cd2Si

C44H42N4O15P4Cd2Si, triclinic, P1̄ (no. 2), a = 13.4778(9) Å, b = 14.2036(9) Å, c = 15.2206(10) Å, α = 69.637(1)°, β = 72.355(1)°, γ = 64.861(1)°, V = 2431.1(3) Å3, Z = 2, R gt(F) = 0.0428, wR ref(F 2) = 0.0987, T = 120(2) K.

A new challenge for nanocrystalline α-zirconium phosphate: reaction with a diepoxyalkane

New organic derivatives of α-zirconium phosphate (ZrP) were prepared by reaction of a gel of nanocrystalline ZrP with 1,2,7,8-diepoxyoctane (diepoxide), leading to the formation of P-O-C bonds. A series of compounds having composition Zr(O₃POH)_2-2x(O₃POCH₂CH(OH)(CH₂)₄CH(OH)CH₂OPO₃)_x (hereafter indicated as ZrP(dep)_x) were obtained by varying the diepoxide/Zr molar ratio in the range 0.25-1. The samples were characterized by elemental, thermal and X-ray powder diffraction analysis. The reaction turned out to be nearly quantitative, the x values of ZrP(dep)_x being in the range 0.16 to 1.0. The interlayer distance slightly increased with increasing x, going from 12.7 to 13.2 Å. Interestingly, the materials easily intercalated alkanols at room temperature, both from liquid and vapor phases; it is noteworthy that ZrP(dep)_0.30 was able to reversibly take up 42 wt% ethanol from the vapor phase, in agreement with the presence of available free space both in the interlayer and in the intercrystal region. Geometrical structural models in which the α-ZrP layers are connected by the dep chains were proposed to support the obtained results.

Exfoliation of zirconium aminophosphonates: investigation into their electronic structures by ab initio calculations

Recently, new structures of zirconium aminophosphonates were synthesized for different applications. We report in this work a theoretical study of these models and the calculation of electronic properties of the bulk materials and their 2D forms.

A fast and highly selective Congo red adsorption material based on a cadmium-phosphonate network

This cadmium-phosphonate network exhibited rapid and efficient adsorption of Congo red dye, as well as excellent structural stability and adsorptive recyclability.

Lanthanide oxalatophosphonates with two types of layered structures: syntheses, structures, luminescence and magnetic properties

Five novel lanthanide(iii) oxalatophosphonates with two types of 2D layered structures have been hydrothermally obtained and structurally characterized. The luminescence and magnetic properties of the title compounds have been studied.

Two fluorescent lead phosphonates for highly selective sensing of nitroaromatics (NACs), Fe3+ and MnO4− ions

Two novel lead(ii) phosphonates have been hydrothermally synthesized. The luminescence properties of compounds 1 and 2 have been investigated. Meanwhile, the selective fluorescent sensing properties of compounds 1 and 2 for p-NP, Fe³⁺ and MnO₄⁻ have also been demonstrated.