Effect of positional isomerism and vanadium substitution on 51V magic angle spinning NMR Spectra Of Wells-Dawson polyoxotungstates
| Autor: | Wenlin Huang, Rupal Gupta, Lynn C. Francesconi, Tatyana Polenova |
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| Rok vydání: | 2017 |
| Předmět: |
Models
Molecular Nuclear and High Energy Physics Magnetic Resonance Spectroscopy Carbon-13 NMR satellite Inorganic chemistry Molecular Conformation Vanadium chemistry.chemical_element 010402 general chemistry 01 natural sciences Article Isomerism Magic angle spinning Anisotropy Instrumentation Radiation 010405 organic chemistry General Chemistry Nuclear magnetic resonance spectroscopy Tungsten Compounds 0104 chemical sciences NMR spectra database Crystallography chemistry Solid-state nuclear magnetic resonance Polyoxometalate |
| Zdroj: | Solid State Nuclear Magnetic Resonance. 84:28-33 |
| ISSN: | 0926-2040 |
| Popis: | We examined the positional isomerism and vanadium substitution on the 51V magic angle spinning NMR spectra of potassium salts of vanadium-substituted polyoxotungstates of the Wells-Dawson series. NMR parameters of this class of catalytically active polyoxotungstates effect of are reported. Multiple species, indicative of differences in the local environment at the substitution sites, are observed in solid-state NMR spectra of the di- and tri- substituted complexes in contrast to solution NMR spectra, where single average chemical shift was observed. The quadrupolar and chemical shift anisotropy parameters depend strongly on the position and the degree of the vanadium substitution into the oxoanion core establishing 51V SATRAS NMR spectroscopy as a sensitive probe of the local electronic environment in these catalytically active solids. |
| Databáze: | OpenAIRE |
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