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Niobium uptake by a [P 8 W 48 O 184 ] 40− macrocyclic polyanion

Reactions of inorganic macrocyclic polytungstate cavitands K 28 Li 5 H 7 [P 8 W 48 O 184 ]·92H 2 O or Li 17 (NH 4 ) 21 H 2 [P 8 W 48 O 184 ]·85H 2 O with (NH 4 )[NbO(C 2 O 4 ) 2 (H 2 O) 2 ]·3H 2 O (Nb–Ox) in aqueous solution lead to incorporation of up to five {NbO(H 2 O)} 3+ units into the {P 8 W 4...

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Published in:New journal of chemistry 2019-06, Vol.43 (25), p.9943-9952
Main Authors: Shmakova, Alexandra A., Volchek, Victoria V., Yanshole, Vadim, Kompankov, Nikolay B., Martin, Nicolas P., Nyman, May, Abramov, Pavel A., Sokolov, Maxim N.
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container_issue 25
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container_title New journal of chemistry
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creator Shmakova, Alexandra A.
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Abramov, Pavel A.
Sokolov, Maxim N.
description Reactions of inorganic macrocyclic polytungstate cavitands K 28 Li 5 H 7 [P 8 W 48 O 184 ]·92H 2 O or Li 17 (NH 4 ) 21 H 2 [P 8 W 48 O 184 ]·85H 2 O with (NH 4 )[NbO(C 2 O 4 ) 2 (H 2 O) 2 ]·3H 2 O (Nb–Ox) in aqueous solution lead to incorporation of up to five {NbO(H 2 O)} 3+ units into the {P 8 W 48 } cavity. The most stable species contain four {NbO(H 2 O)} 3+ units. The uptake of {NbO(H 2 O)} 3+ was determined by corroborative methods including single crystal XRD, inductively coupled plasma atomic emission spectroscopy (ICP-AES), 31 P and 13 C nuclear magnetic resonance (NMR), C–H–N elemental analysis (EA) and thermal gravimetric analysis (TGA). Solution speciation of the Nb-encapsulating macrocycles was studied by HPLC-ICP-AES and small angle X-ray scattering (SAXS).
doi_str_mv 10.1039/C9NJ01907C
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source Royal Society of Chemistry
subjects Aqueous solutions
Atomic beam spectroscopy
Chemical analysis
Crystallography
Emission analysis
Gravimetric analysis
Inductively coupled plasma
Niobium oxides
NMR
Nuclear magnetic resonance
Polyelectrolytes
Single crystals
Small angle X ray scattering
Speciation
Thermal analysis
title Niobium uptake by a [P 8 W 48 O 184 ] 40− macrocyclic polyanion
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