Topic
Polyoxometalate
About: Polyoxometalate is a research topic. Over the lifetime, 3493 publications have been published within this topic receiving 94123 citations. The topic is also known as: POM.
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TL;DR: In this article, the synthesis and characterization of a tetrameric complex from Keggin ions has been described, which is stable under physiological conditions of the stomach (pH 1-2) and is one of the least toxic and yet most potent antiviral agents of the more than 300 polyoxometalates investigated biologically and pharmacologically.
Abstract: Giant polyoxometalates with catalytic, magnetic, and antiviral properties, which are in part attributable to their structures, are currently of great interest. Herein is described the synthesis and characterization of 1, a structurally novel tetrameric complex from Keggin ions (see picture). This complex is stable under the physiological conditions of the stomach (pH 1-2), which is interesting since related keggin anions are among the least toxic and yet most potent antiviral agents of the more than 300 polyoxometalates investigated biologically and pharmacologically.
93 citations
TL;DR: The synthesis and crystal structure of Cu(6)(4,7-phenanthroline)(8)(MeCN)(4)(6+) a novel Cu(i)-molecular hexamer is described in which the metal cations and phenan Throline molecules self-assemble into a dimer of shallow triangular-shaped bowls.
93 citations
TL;DR: In this paper, a polyoxometalate-zirconia (POM/ZrO2) nanocomposite was prepared through entrapment of H3PW12O40 polyoxometricalate into zirconian matrix by sol-gel technique involving the hydrolysis of Zirconium (IV) n-butoxide, Zr(n-OBu)4, as the ZrO 2 source.
Abstract: A polyoxometalate–zirconia (POM/ZrO2) nanocomposite was prepared through entrapment of H3PW12O40 polyoxometalate into zirconia matrix by sol–gel technique involving the hydrolysis of zirconium (IV) n-butoxide, Zr(n-OBu)4, as the ZrO2 source. The catalyst was characterized by using XRD, FT-IR, SEM, TEM and surface area measurement and used as an efficient heterogeneous photocatalyst for aerobic oxidation of alcohols. Various primary and secondary benzylic alcohols were oxidized into the corresponding aldehydes and ketones in high yields under O2 atmosphere in the presence of photoexcited POM/ZrO2 nanocomposite. Also, nonactivated aliphatic alcohols were oxidized in good yields albeit after longer reaction times in comparison with benzylic alcohols, so that the selective oxidation of a benzylic OH group in the presence of a non-benzylic OH group could be achieved by the appropriate choice of the reaction time. The photocatalyst has been reused several times, without observable loss of activity and selectivity. Indeed, the photocatalytic activity of the POM/ZrO2 was higher than that of pure POM.
93 citations
93 citations
TL;DR: The first single-crystal X-ray analysis of an orthorhombic Mo-V-based oxide, a promising catalyst for light alkane selective oxidation known as the "M1 phase", revealed the structure of the compound.
Abstract: Mix and match: The pentagonal [Mo(6)O(21)](n-) polyoxomolybdate building block assembles with other sources of Mo, V, and Sb ions to form an orthorhombic Mo-V-Sb oxide. The first single-crystal X-ray analysis of an orthorhombic Mo-V-based oxide, a promising catalyst for light alkane selective oxidation known as the "M1 phase", revealed the structure of the compound.
92 citations