Coordination of Pt(IV) by {P<sub>8</sub>W<sub>48</sub>} Macrocyclic Inorganic Cavitand: Structural, Solution, and Electrochemical Studies
Anna A. Kuznetsova, Victoria V. Volchek, Vadim V. Yanshole, А. Д. Федоренко, Nikolay B. Kompankov, Vasily V. Kokovkin, Artem L. Gushchin, Pavel A. Abramov⧫, Maxim N. Sokolov⧫
Abstract
Hydrothermal reaction of a macrocyclic inorganic POM cavitand Li17(NH4)21H2[P8W48O184] with [Pt(H2O)2(OH)4] results in coordination of up to six {Pt(H2O)x(OH)4–x} fragments to the internal surface of the polyoxoanion. The product was isolated as K22(NH4)9H3[{Pt(OH)3(H2O)}6P8W48O184]·79H2O (1) and characterized by multiple techniques in the solid state (SCXRD, XRPD, XPS, FTIR, and TGA) and in solution (NMR, ESI-MS, and HPLC-ICP-AES). Electrochemical properties were studied both in solution and as components of the paste electrode. The complex shows electrocatalytic activity in water oxidation.