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Isolation of New Niobium clusters with Alkali Carbonate

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  • Polyoxoniobates (PONbs) are attracting great attention in recent years due to its novelty as well as a variety of geometrical presentations in different pH conditions. In this paper we are reporting the reaction of tetramethyl-decaniobate ([(CH3)4N]6[Nb10O28]) with alkaline carbonates to observe the periodic trend of alkaline ions interacting with the Nb10 cluster, using solution characterization including Small Angle X-ray Scattering (SAXS) and Raman scattering spectroscopy. We have isolated a new type of Nb10 cluster via the reaction TMA-Nb10 with potassium carbonate in both aqueous and 50% v/v water-methanol mixture. Both solid-state characterizations including Powder X-ray Diffraction (PXRD) and Single-Crystal X-ray Diffraction and above-mentioned, solution characterization reveal the connectivity in solid-state and in solution.
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