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Salt-Templated Mesoporous Solids Comprised of Interlinked Polyoxovanadate Clusters

Wendy Lee Queen
2010
Journal paper
Abstract

The utility of molten salts was demonstrated in the synthesis of the 1st family of mesoporous salt-inclusion solids featuring [V4O16] and [V5O17] polyoxovanadate (POV) units interlinked by As5+ cations, Cs3.5Na1.47(V5O9)(AsO4)2Cl2.33, Cs3.88Na0.12(V4.6O8.6)(AsO4)2Cl.99 and Cs3.64Na1.4(V4O8)(AsO4)2Cl3.04. Despite a high-temp. synthesis, these new solids exhibit unusually porous (∼2-nm-diam.) V arsenate frameworks. Disordered metal chloride salts reside inside the pores, leading to relatively large voids (up to ∼7.2% of the unit cell vol.), which were confirmed by surface area (SA) measurements of the as-prepd. polycryst. samples (∼90-110 m2/g). Given the potential utility of porous POV-contg. materials, efforts were made to study changes in the SAs (showing ∼35-70% increases) upon salt removal and redox chem.

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