Mixed-Valent Mn-16-Containing Heteropolyanions: Tuning of Oxidation State and Associated Physicochemical Properties
| Autor(en): | Haider, Ali Ibrahim, Masooma Bassil, Bassem S. Carey, Akina M. Anh Nguyen Viet Xing, Xiaolin Ayass, Wassim W. Minambres, Juan F. Liu, Rongji Zhang, Guangjin Keita, Bineta Mereacre, Valeriu Powell, Annie K. Balinski, Kamil N'Diaye, Alpha T. Kuepper, Karsten Chen, Han-Yi Stimming, Ulrich Kortz, Ulrich |
Stichwörter: | BUILDING-BLOCKS; Chemistry; Chemistry, Inorganic & Nuclear; CRYSTAL-STRUCTURE; DIMERIC POLYOXOANIONS; ELECTROCHEMICAL GENERATION; FREE AEROBIC OXIDATION; MN-III; POLYOXOMETALATE; SINGLE-MOLECULE MAGNET; TRANSITION-METAL; WATER OXIDATION | Erscheinungsdatum: | 2016 | Herausgeber: | AMER CHEMICAL SOC | Journal: | INORGANIC CHEMISTRY | Volumen: | 55 | Ausgabe: | 6 | Startseite: | 2755 | Seitenende: | 2764 | Zusammenfassung: | 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. |
ISSN: | 00201669 | DOI: | 10.1021/acs.inorgchem.5b02503 |
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geprüft am 18.05.2024
