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High-gain Tm/Ho co-doped optical fibers are urgently desired for high-repetition-rate mode-locked fiber lasers at >2 µm. Here, Tm/Ho co-doped germanate glass with low hydroxyl (OH) content was prepared by the conventional melt-quenching method combined with the reaction atmosphere procedure (RAP) dehydration technique. The doping concentrations of TmO and HoO are 2.
View Article and Find Full Text PDFZeolite NPO-Type Azolate Frameworks.
Angew Chem Int Ed Engl
September 2022
Shanghai Key Laboratory of High-Resolution Electron Microscopy, School of Physical Science and Technology, ShanghaiTech University, Shanghai, 201210, China.
Article Synopsis
- Three-membered rings play a key role in zeolite chemistry, specifically in designing zeolitic imidazolate frameworks (ZIFs), but their formation has been largely accidental in the past.
- This study introduces a method for creating four new ZIFs (ZIF-1001 to -1004) using tetrahedral zinc centers, a specific linker (benzotriazolate), and functionalized benzimidazolates, resulting in a unique NPO-type topology.
- The new ZIFs can effectively capture carbon dioxide from high-humidity flue gas and isolate ethane during shale gas extraction processes.
Phosphorescence in Mn-Doped / Germanates ( = Na or K, = Sr).
Inorg Chem
June 2022
Department of Chemistry and Chemical Biology, McMaster University, 1280 Main Street West, Hamilton, Ontario L8S 4M1, Canada.
Article Synopsis
- Three new compounds, NaSrGeO, NaSrGeO, and KSrGeO, were created and analyzed using single-crystal X-ray diffraction, revealing 3D anionic frameworks with GeO polyhedra.
- These compounds are viable for Mn substitution, allowing them to potentially serve as red-emitting phosphors useful in light conversion technologies.
- The study observed distinct photoluminescence properties from the Mn and Pr activators, with Pr emitting at a shorter wavelength, and included measurements of second harmonic generation for the NaSrGeO phase, indicating weak SHG activity.
Structural and Vibrational Study of CsSbGeO, a New Germanate in the SbGeO Family ( = Alkali Metal).
Inorg Chem
July 2021
ICGM, Université Montpellier, CNRS, ENSCM, Montpellier 34095, France.
The germanate CsSbGeO, grown spontaneously via the high-temperature solution method from CsMoO used as a flux, crystallizes in the orthorhombic system with = 12.3636(2), = 13.8521(2), = 31.
View Article and Find Full Text PDFFormation of Open Framework Uranium Germanates: The Influence of Mixed Molten Flux and Charge Density Dependence in U-Silicate and U-Germanate Families.
Inorg Chem
September 2018
Institute of Energy and Climate Research (IEK-6), Forschungszentrum Jülich GmbH , 52428 Jülich , Germany.
Seven novel open-framework uranyl germanates, K(UO)GeO, K(UO)GeO, α-Cs(UO)GeO, β-Cs(UO)GeO, Cs(UO)GeO, and A(UO)(GeO) (A = [NaKCl], [NaCsCl]), were grown from different mixed molten fluxes. The three-dimensional (3D) structure of K(UO)GeO with 8-ring channels can be built upon [UGe] pentamer secondary building units (SBUs). The 3D framework of K(UO)GeO with trapezoid (GeO) clusters consists of two types of [UGe] pentamers.
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