Di- and Tri-Cobalt Silicotungstates: Synthesis, Characterization, and Stability Studies
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https://figshare.com/articles/dataset/Di_and_Tri_Cobalt_Silicotungstates_Synthesis_Characterization_and_Stability_Studies/2450731
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资源简介：
Di- and tricobalt silicotungstate complexes, K5Na4H4[{Na3(μ-OH2)2Co2(μ-OH)4} (Si2W18O66)]·37H2O (1) and K6Na3[Na(H2O){Co(H2O)3}2{Co(H2O)2}(Si2W18O66)]·22H2O (2), have been synthesized through reaction of cobalt chloride
and [A-α-SiW9O34]10– in acidic buffer solution. They have been characterized by X-ray
crystallography, elemental analysis, cyclic voltammetry, infrared,
and UV–vis spectroscopy. In 1, two cobalt atoms
as well as three sodium atoms are incorporated in the central pocket
of the [Si2W18O66]16– polyanion. In 2, one cobalt atom and one sodium atom
are incorporated in the pocket of [Si2W18O66]16–; two other cobalt atoms in this complex
protrude outside the pocket and connect with WO6 units
of other [Si2W18O66]16– polyanions to form a one-dimensional polymeric structure. The crucial
parameters in the synthesis of these two compounds are discussed,
and their stability in different buffer solutions is studied. The
decomposition of 1 or 2 in heated potassium
acetate buffer (pH 4.8, 1 M) yields K11[{Co2(H2O)8}K(Si2W18O66)]·17H2O (3) based on spectroscopic
studies and an X-ray crystal structure.
创建时间：
2013-01-18
