A rational assembly of paradodecatungstate anions from clusters to morphology-controlled nanomaterials

Jassal, Amanpreet Kaur; Mudsainiyan, Rahul Kumar; Shankar, Ravi

doi:10.1039/d0qm00646g

Cited by 8 publications

(2 citation statements)

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“…The crystal packing of methylammonium paradodecatungstate can be reversibly changed by drying and by the re‐addition of water. In addition, several tungsten‐oxide‐based compounds can be prepared via the thermal decomposition of paradodecatungstate [11,33,34] . The thermal transformation of methylammonium paradodecatungstate to tungsten oxide is also reported.…”

Section: Introductionmentioning

confidence: 99%

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Structure and Thermal Transformations of Methylammonium Tungstate

Sukmana

Sugiarto

Zhang

et al. 2021

Zeitschrift anorg allge chemie

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Methylammonium paradodecatungstate, (CH3NH3)10[H2W12O42] ⋅ nH2O, was prepared by the reaction of WO3 or H2WO4 in aqueous methylamine, followed by drying. The [H2W12O42]10− anion consists of two HW3O13 groups containing three edge‐sharing WO6 octahedra and two W3O14 groups having two edge‐sharing connections. On drying the produced material at 70 °C, some lattice water was released, but this did not affect the [H2W12O42]10− structure, although there was a decrease in the unit cell volume. By adding water, the loss of lattice water and structural changes were reversed. The existence of paradodecatungstate anions was confirmed by single‐crystal and powder X‐ray diffraction, Fourier transform infrared, Raman, 183W nuclear magnetic resonance, and ultraviolet‐visible spectroscopy. When the methylammonium paradodecatungstate was heated to more than 150 °C, CH3NH2 and H2O were released, and amorphous WO3 was observed as an intermediate product and monoclinic WO3 as the final product. These results reveal the structure of methylammonium tungstate, which was first reported in 1909 and now is used as an important negative staining reagent for virus observation, is methylammonium paradodecatungstate.

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Section: Introductionmentioning

confidence: 99%

“…Isopolyoxotungstate is one of the most important polyoxometalates [11] and is a building block for polyoxometalate‐based compounds, [1–3,10] a tungsten oxide precursor, [12–14] and a staining reagent [15] . It is also one of the tungsten species extracted from tungsten ore [16,17] .…”

Section: Introductionmentioning

confidence: 99%