Potassium cesium and ammonium peroxogermanates with inorganic hexanuclear peroxo bridged germanium anion isolated from aqueous solutionстатья
Статья опубликована в высокорейтинговом журнале
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Дата последнего поиска статьи во внешних источниках: 16 ноября 2017 г.
Аннотация:Potassium, cesium ammonium and potassium ammonium peroxogermanates were isolated from 3% hydrogen peroxide aqueous solutions of the corresponding hydroxogermanates and characterized by single crystal and powder X-ray diffraction studies and by Raman spectroscopy and thermal analysis. The crystal structure of all three compounds consists of cations of potassium and/or ammonium and cesium, water molecules, and centrosymmetric hexanuclear peroxogermanate anion with six μ-oxo- and six μ-peroxo groups. Peroxogermanates demonstrate relatively high thermal stability: the peroxide remains in the structure even after water release after heating to 100−120 °C. DFT calculations of the peroxogermanate anion confirm its higher thermodynamic stability compared to the hydroperoxo- and oxogermanate analogues.