Class B sodalites: nonstoichiometric silver, sodium halosodalites

Stein, Andreas; Ozin, Geoffrey A.; Stucky, Galen D.

doi:10.1021/ja00047a021

Cited by 42 publications

(49 citation statements)

References 13 publications

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“…Stefanie Eiden-Aûmann, [a] * A. M. Schneider, [b] Peter Behrens, [b] Michael Wiebcke, [a] Günter Engelhardt, [c] and Jürgen Felsche [a] Abstract: Ion exchange of the sodium hydro sodalites [Na 3 2 an overexchange occurs with respect to the number of nonframework cationic charges. Rietveld structure refinement of the lead hydro sodalite based on powder X-ray diffraction data (cubic, a 9.070 , room temperature, space group P4 Å 3n) revealed that the two lead cations within each polyhedral sodalite cage form an orientationally disordered dinuclear [Pb 2 (m-OH)(m-H 2 O)(H 2 O) 2 ] 3 complex.…”

Section: H Mas Nmr Ftir and Xanes Spectroscopymentioning

confidence: 99%

“…[12] No amorphous by-products were visible on scanning electron micrographs, so all analytical data refer to the crystalline compound. The approximate ionexchange rates determined experimentally were 120 % for [Na 3 Figure 1. The total mass loss of 7.39 % observed in the range 120 ± 550 8C corresponds to the release of seven water molecules [a] The thermal parameters of the lead cation were refined anisotropically (see Table 2).…”

Section: Introductionmentioning

confidence: 95%

“…[1] Sodalites have also attracted considerable attention for their intra-cage reaction chemistry and interesting materials properties (for example cathodochromism, photochromism or ion conduction) and as periodic host matrices for the spatial organization of quantum-sized semiconductor clusters and cluster arrays. [2] Quantum-size effects such as blue shifts in the optical absorption edges have been observed for aluminosilicate sodalites containing silver salts, [3] but may be due to strong electronic interactions between Ag ions and the negatively charged framework rather than to the spatial organization of quantum-sized clusters within the crystalline host framework. [4] The synthesis of zeolites containing electronically soft divalent metal cations by ion-exchange reactions has been reported, and Pb 2 ions have been shown to give high exchange rates.…”

Section: Introductionmentioning

confidence: 99%

“…Zeolite A samples into which PbI 2 had been inserted showed blue shifts in their UV/visible adsorption edges that depended on the degree of PbI 2 loading. [7] As part of our investigations into the synthesis, structure and properties of aluminosilicate sodalites containing soft metal cations, [8,9] we have studied the ion exchange of the three well-characterized sodium hydro sodalites, [Na 3 Here we report primarily the characterization of this lead hydro sodalite by means of Rietveld structure refinement based on powder X-ray diffraction data and 1 H MAS NMR, FTIR, and XANES (X-ray adsorption near-edge structure) spectroscopy. Full details of the ion-exchange behavior will be presented elsewhere, along with the ion-exchange characteristics of other soft metal cations with sodium hydro sodalites.…”

Section: Introductionmentioning

confidence: 99%

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Lead Hydro Sodalite [Pb2(OH)(H2O)3]2[Al3Si3O12]2: Synthesis and Structure Determination by Combining X-ray Rietveld Refinement,1H MAS NMR FTIR and XANES Spectroscopy

et al. 2000

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Ion exchange of the sodium hydro sodalites [Na3(H2O)4]2-[Al3Si3O12]2 [Na4(H3O2)]2[Al3Si3O12]2 and [Na4(OH)]2[Al3Si3O12]2 with aqueous Pb(NO3)2 solutions yielded, whichever reactant sodalite phase was used, the same lead hydro sodalite, [Pb2(OH)-(H2O)3]2[Al3Si3O12]2. Thus, in the case of the non-basic reactant [Na3(H2O)4]2-[Al3Si3O12]2 an overexchange occurs with respect to the number of nonframework cationic charges. Rietveld structure refinement of the lead hydro sodalite based on powder X-ray diffraction data (cubic, a = 9.070 A, room temperature, space group P43n) revealed that the two lead cations within each polyhedral sodalite cage form an orientationally disordered dinuclear [Pb2(micro-OH)(micro-H2O)(H2O)2]3+ complex. Due to additional lead framework oxygen bonds the coordination environment of each metal cation (CN 3+3) is approximately spherical, and clearly the lead 6s electron lone pair is stereochemically inactive. This is also suggested by the absence of a small peak at 13.025 keV, attributed in other Pb2+-O compounds to an electronic 2p-6s transition, in the PbL3 edge XANES spectrum. 1H MAS NMR and FTIR spectra show that the hydrogen atoms of the aqua hydroxo complex (which could not be determined in the Rietveld analysis) are involved in hydrogen bonds of various strengths.

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Section: H Mas Nmr Ftir and Xanes Spectroscopymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Lead Hydro Sodalite [Pb2(OH)(H2O)3]2[Al3Si3O12]2: Synthesis and Structure Determination by Combining X-ray Rietveld Refinement,1H MAS NMR FTIR and XANES Spectroscopy

et al. 2000

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“…Most studies have been devoted to mixed cation substitutions in sodalite frameworks [9,10] and to single anion sodalites [11,12]. Multiple anion substitution in sodalite is less well characterized.…”

Section: N N Introductionmentioning

confidence: 99%

Perrhenate incorporation into binary mixed sodalites: The role of anion size and implications for technetium-99 sequestration

et al. 2015

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ABSTRACT:Perrhenate (ReO 4 − ), as a TcO 4 − analogue was incorporated into mixed-anion sodalites from binary solutions containing ReO 4 − and a competing anion X n− (Cl − , CO 3 2− , SO 4 2− , MnO 4 − , or WO 4 2− ). Our objective was to determine the extent of solid solutions formation and the dependence of competing ions selectivity on ion size. Using equivalent aqueous concentrations of the anions (ReO 4 − / X n− molar ratio = 1:1), mixed-anion sodalites were hydrothermally synthesized from zeolite and NaOH at 90°C for 96 hours. The resulting solids were characterized by bulk chemical analysis, X-ray diffraction, scanning electron microscopy, and X-ray absorption near edge structure (XANES) spectroscopy to determine the crystal structure, chemical composition, and morphology, and to confirm the rhenium (Re) oxidation state. Rhenium in the solid phase occurred predominately as [21]. The following parameters were allowed to vary: the background (8 parameters), unit cell, Na position, Re/anion occupancy, peak shape (5 parameters:

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Nanocomposite Materials: Semiconductors in Zeolites

Goldbach

Saboungi

2005

Encyclopedia of Inorganic Chemistry

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Encapsulation in zeolites holds considerable promise for organizing semiconductor quantum dots and quantum wires into ordered two‐ and three‐dimensional arrays that can be used in a variety of applications. While the use of such materials has been limited until now by a number of practical difficulties, considerable progress has been made in the last few years in surmounting these obstacles. This article reviews recent progress in the field, particularly with regard to stabilization of the nanocomposites against moisture, modulation of their properties by appropriate cation substitution, and preparation of materials in the form of thin films that can exhibit strong nonlinear optical activity. Finally, the article discusses the present perspectives for the field and outlines some research directions that must be pursued for these materials to achieve their full range of potential applications.

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Class B sodalites: nonstoichiometric silver, sodium halosodalites

Cited by 42 publications

References 13 publications

Lead Hydro Sodalite [Pb2(OH)(H2O)3]2[Al3Si3O12]2: Synthesis and Structure Determination by Combining X-ray Rietveld Refinement,1H MAS NMR FTIR and XANES Spectroscopy

Lead Hydro Sodalite [Pb2(OH)(H2O)3]2[Al3Si3O12]2: Synthesis and Structure Determination by Combining X-ray Rietveld Refinement,1H MAS NMR FTIR and XANES Spectroscopy

Perrhenate incorporation into binary mixed sodalites: The role of anion size and implications for technetium-99 sequestration

Nanocomposite Materials: Semiconductors in Zeolites

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