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Two new large‐pore sodium vanadium silicates, denoted AM‐15 and AM‐17 (Aveiro‐Manchester, structures number 15 and 17) with framework composition Na6Si14V4O39 and Na4CaSi10V2O27, respectively, are reported. Electron paramagnetic resonance (EPR), Fourier transform infrared (FTIR) and diffuse reflectance ultraviolet‐visible (DR UV/Vis) spectroscopy reveal that as‐prepared AM‐15 contains both VIV and VV in a square pyramidal and tetrahedral coordination, respectively, while AM‐17 contains predominantly octahedral VIV. The thermal stability of AM‐15 in air is modest (ca. 380 °C), while AM‐17 is stable up to 450 °C. The acid‐base and redox properties of AM‐17 have been assessed by the conversion of isopropanol and ethanol oxidation, respectively. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2003)
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Brandão et al. (2003) studied this question.
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