Results 151 to 160 of about 2,731 (183)
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3P and 3C chemical-shift tensors in zirconium phosphonates
Journal of Magnetic Resonance (1969), 1992Abstract The orientations of the 31 P phosphonate and 13 C carboxyl chemical-shift tensors in the molecular frame of layered Zr(O 3 PCH 2 OOH) 2 have been determined. The magnitudes of the three principal elements of these tensors were extracted from the 31 P and 13 C chemical-shift anisotropy (CSA) powder patterns, respectively, of Zr(O 3 PCH 2
David A Burwell +2 more
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α-Zirconium phosphonates as new supports for metallocene catalysts
Journal of Molecular Catalysis A: Chemical, 2004Abstract Homoleptic and mixed α-zirconium phosphonates (ZrPs) α-Zr(O 3 PR) 2 (R = Me, Bu n , Bu i , Hex, Oct and Ph) and α-Zr(O 3 PR 1 ) 2− x (O 3 PR 2 ) x were readily prepared in high yields from zirconyl choride and the corresponding phosphonic acids in suitable solvent mixtures under hydrothermal conditions at low fluoride concentrations.
Beck, Stefan +2 more
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Zirconium Phosphonate Frameworks Covalently Pillared with a Bipyridine Moiety
Chemistry of Materials, 2000This paper describes for the first time the covalent immobilization of 5,5‘-bis(dihydroxyphosphoryl)-2,2‘-bipyridine (H2O3P-bipy-PO3H2: 1) within the interlayer gallery of α and γ zirconium phosphonate structures. A mixed phosphite/phosphonate compound formulated as Zr(HPO3)0.8(O3P-bipy-PO3)0.6·5.3H2O was obtained by reaction of 5,5‘-bis ...
Fabrice Odobel +2 more
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Ultrathin micropatterned porphyrin films assembled via zirconium phosphonate chemistry
Polyhedron, 2003The synthesis of a phosphonic-acid-functionalized porphyrin is presented and a procedure for the reproducible assembly of the porphyrins into thin films on glass or conductive glass surfaces is described. The assembly scheme, which utilizes established zirconium phosphonate (ZrP) chemistry, yields highly oriented films (normal to the surface) of well ...
Aaron M. Massari +5 more
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Synthesis and catalytic application of zirconium-substituted aminoethyl phosphonate
Journal of Materials Science, 2006A new type of zirconium-substituted aminoethyl phosphonate material is prepared and characterized by elemental analysis, ICP, FTIR, XRD, 31P-MAS NMR, TG, DTG and DSC. XRD indicates that the material is amorphous. The 31P-MAS NMR of the material exhibits a single resonance, and thermogravimetry shows that the material has three steps mass loss at ...
Renquan Zeng +3 more
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CRYSTAL ENGINEERING ON MULTIFUNCTIONAL LAYERED ZIRCONIUM PHOSPHONATES
2013Crystal engineering is the design and synthesis of molecular solid-state structures with desired properties, based on the understanding and exploitation of intermolecular interactions. Layered zirconium phosphonates can be considered “tailor-made” materials that can be designed by exploiting the crystal engineering principles.
COSTANTINO, FERDINANDO +2 more
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Molecular Design of Two-Dimensional Zirconium Phosphonate Catalysts
1991Preparation and characterization of two-dimensional zirconium phosphonate derivatives in either crystalline or amorphous forms have been investigated. Two composite zirconium phosphonates in single crystal phase have also been investigated and characterized by XRD, 13C-, and 31P-MASNMR.
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A 3D Cu‐Naphthalene‐Phosphonate Metal–Organic Framework with Ultra‐High Electrical Conductivity
Advanced Functional Materials, 2021Bunyemin Cosut +2 more
exaly
3.11 Preparation and Catalytic Properties of Composite Zirconium Phosphonates
1994Abstract Composite zirconium phosphonates (pendant and pillared) in single crystal phase have been investigated and characterized by XRD, 13C-, and 31P-MASNMR. These compounds are lamellar structures comprising zirconium phosphates or organophosphonates.
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