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Two new polyoxovanadate clusters templated through cysteamine

TLDR
In this article, two new fully oxidized polyoxovanadate cluster-based solids (C4N2S2H14)2[H2V10O28]·4H2O,1 and C4N 2S 2H14]5[H4V15O42]2·l0H 2O,2 are crystallized under self-assembly process in the presence of cysteamine.
Abstract
Two new fully oxidized polyoxovanadate cluster-based solids (C4N2S2H14)2[H2V10O28]·4H2O,1 and (C4N2S2H14)5[H4V15O42]2·l0H2O,2 are crystallized under self-assembly process in the presence of cysteamine. In both1 and2, cysteamines are oxidized forming disulphide linkages and occur as counter cations. The organic cations assemble around V10O28 cluster anions in1 whereas they aggregate around V15O42 clusters in 2· pH appears to be the structure determinant in the occurrence of decavanadate cluster in1 and pentadecavanadate in2, with the same counter cation.

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[V16O38(CN)]9–: a soluble mixed-valence redox-active building block with strong antiferromagnetic coupling.

TL;DR: A new discrete cluster, which displays the hitherto unknown 8- charge on the cluster shell and is the first to encapsulate the cyanide anion, has been synthesized and characterized by IR and UV/vis/near-IR spectroscopy, electrochemistry, and magnetic susceptibility measurements.
Journal ArticleDOI

Copper pyrazole directed crystallization of decavanadates: synthesis and characterization of {Cu(pz)}4[{Cu(pz)3}2V10O28] and (Hpz)2[{Cu(pz)4}2V10O28]·2H2O

TL;DR: In this paper, two new fully oxidized decavanadate based 1-D solid {Cu(pz)4}[{Cu( pz)3}2V10O28], 1 and a 2-D inorganic-organic hybrid solid (Hpz), 2 have been effected under self-assembly condition.
Journal ArticleDOI

Binary Decavanadate‐Betaine Composite Materials of Potential Anticarcinogenic Activity

TL;DR: In this paper, pH-specific synthetic chemical reactivity between vanadium and triethyl ammonium acetate/trigonelline in aqueous and mixed organic-aqueous media led to the isolation of three new binary composite materials.
Journal ArticleDOI

Influence of the steric hindrance of organic amines on the supramolecular network based on polyoxovanadates

TL;DR: In this article, three new supramolecular architectures based on polyoxovanadates H6V10O28·2HMTA·8H2O(1), Ni(enMe)3]2(VIV8V7O36Cl)·2H3O (2) and Co(en)3) have been prepared and characterized by elemental analyses.
Journal ArticleDOI

Size and shape trump charge in interactions of oxovanadates with self-assembled interfaces: application of continuous shape measure analysis to the decavanadate anion

TL;DR: BarBaruah et al. as mentioned in this paper employed 51V NMR spectroscopy, dynamic light scattering and continuous shape measure analysis to probe the solvation of two polyoxometalates, decavanadate and monomolybdononadate, encapsulated in reverse micelles.
References
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Journal ArticleDOI

Phase annealing in SHELX-90: direct methods for larger structures

TL;DR: In this article, a phase annealing method, related to the simulated-annealing approach in other optimization problems, is proposed and it is shown that it can result in an improvement of up to an order of magnitude in the chances of solving large structures at atomic resolution.
Journal ArticleDOI

Polyoxometalate Chemistry: An Old Field with New Dimensions in Several Disciplines

TL;DR: Inorganic metal-oxygen cluster anions form a class of compounds that is unique in its topological and electronic versatility and is important in several disciplines, such as analytical and clinical chemistry, catalysis (including photocatalysis), biochemistry, and medicine (antitumoral, antiviral, and even anti-HIV activity) as mentioned in this paper.
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TL;DR: A survey of polyoxometalates can be found in this paper, where the authors survey the chemistry, structures, and applications of these species, as well as their applications in inorganic chemistry.
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TL;DR: In this paper, the authors introduce the concept and principles of polyoxometalate chemistry and present a list of the most relevant types of POM compounds for nano, superramolecular, and solid-state chemistry.
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