Characterization of multifunctional β-NaEuF4/NaGdF4 core–shell nanoparticles with narrow size distribution

We characterized NaEuF4/NaGdF4 core–shell nanoparticles

Mixed-Valent Mn-16-Containing Heteropolyanions: Tuning of Oxidation State and Associated Physicochemical Properties

The two 16-manganese-containing, Keggin-based 36-tungsto-4-silicates [(Mn10Mn6O6)-Mn-III-O-II(OH)(6)(PO4)(4)(A-alpha-SiW9O34)(4)](28-) (1) and [(Mn4Mn12II)-Mn-III(OH)(12)(PO4)(4)(A-alpha-SiW9O34)(4)](28-) (2) have been prepared by reaction of the trilacunary Keggin precursor [A-alpha-SiW9O34](10-) with either Mn(OOCCH3)(3)center dot 2H(2)O (for 1) or MnCl2 center dot 4H2O (for 2), in aqueous phosphate solution at pH 9. Polyanions 1 and 2 comprise mixed-valent, cationic {(MnMnI6O6)-Mn-III-I-II(OH)(6)}(24+) and {(Mn10Mn6O6)-Mn-III-O-II(OH)(6)(PO4)(4) cores, respectively, encapsulated by four phosphate groups and four {SiW9} units in a tetrahedral fashion. Both polyanions were structurally and compositionally Characterized by single-crystal XRD, IR, therrnogravimetric analysis, and X-ray absorption,, spectroscopy. Furthermore, studies were performed probing, the magnetic, electrochemical, oxidation catalytic, and Li-ion battery performance of 1 and 2

Mixed-Valent Mn₁₆-Containing Heteropolyanions: Tuning of Oxidation State and Associated Physicochemical Properties

The two 16-manganese-containing, Keggin-based 36-tungsto-4-silicates [Mn^III₁₀Mn^II₆O₆­(OH)₆­(PO₄)₄­(<i>A</i>-α-SiW₉O₃₄)₄]^28– (<b>1</b>) and [Mn^III₄Mn^II₁₂­(OH)₁₂­(PO₄)₄­(<i>A</i>-α-SiW₉O₃₄)₄]^28– (<b>2</b>) have been prepared by reaction of the trilacunary Keggin precursor [<i>A</i>-α-SiW₉O₃₄]^10– with either Mn­(OOCCH₃)₃·2H₂O (for <b>1</b>) or MnCl₂·4H₂O (for <b>2</b>), in aqueous phosphate solution at pH 9. Polyanions <b>1</b> and <b>2</b> comprise mixed-valent, cationic {Mn^III₁₀Mn^II₆O₆­(OH)₆}²⁴⁺ and {Mn^III₄Mn^II₁₂­(OH)₁₂}²⁴⁺ cores, respectively, encapsulated by four phosphate groups and four {SiW₉} units in a tetrahedral fashion. Both polyanions were structurally and compositionally characterized by single-crystal XRD, IR, thermogravimetric analysis, and X-ray absorption spectroscopy. Furthermore, studies were performed probing the magnetic, electrochemical, oxidation catalytic, and Li-ion battery performance of <b>1</b> and <b>2</b>