Niobium uptake by a [P8W48O184]40− macrocyclic polyanion

Alexandra A. Shmakova; Victoria V. Volchek; Vadim Yanshole; Nikolay B. Kompankov; Nicolas P. Martin; May Nyman; Pavel A. Abramov; Maxim N. Sokolov

doi:10.1039/C9NJ01907C

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Niobium uptake by a [P₈W₄₈O₁₈₄]⁴⁰⁻ macrocyclic polyanion†

Alexandra A. Shmakova,^a Victoria V. Volchek,

^a Vadim Yanshole,

^bc Nikolay B. Kompankov,^a Nicolas P. Martin,^d May Nyman,

^d Pavel A. Abramov

*^ab and Maxim N. Sokolov

^ab

Author affiliations

* Corresponding authors

^a Nikolaev Institute of Inorganic Chemistry, 3 Akad. Lavrentiev Ave, Novosibirsk, Russia
E-mail: abramov@niic.nsc.ru

^b Novosibirsk State University, Pirogova Str. 2, Novosibirsk, Russia

^c International Tomography Center, Institutskaya Str. 3a, Novosibirsk, Russia

^d Department of Chemistry Oregon State University, 153 Gilbert Hall Corvallis, Oregon 97331-4003, USA

Abstract

Reactions of inorganic macrocyclic polytungstate cavitands K₂₈Li₅H₇[P₈W₄₈O₁₈₄]·92H₂O or Li₁₇(NH₄)₂₁H₂[P₈W₄₈O₁₈₄]·85H₂O with (NH₄)[NbO(C₂O₄)₂(H₂O)₂]·3H₂O (Nb–Ox) in aqueous solution lead to incorporation of up to five {NbO(H₂O)}³⁺ units into the {P₈W₄₈} cavity. The most stable species contain four {NbO(H₂O)}³⁺ units. The uptake of {NbO(H₂O)}³⁺ was determined by corroborative methods including single crystal XRD, inductively coupled plasma atomic emission spectroscopy (ICP-AES), ³¹P and ¹³C 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).

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Correction: Niobium uptake by a [P8W48O184]40− macrocyclic polyanion

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Article information

DOI: https://doi.org/10.1039/C9NJ01907C
Article type: Paper
Submitted: 13 Apr 2019
Accepted: 29 May 2019
First published: 30 May 2019

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New J. Chem., 2019,43, 9943-9952

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Niobium uptake by a [P₈W₄₈O₁₈₄]⁴⁰⁻ macrocyclic polyanion

A. A. Shmakova, V. V. Volchek, V. Yanshole, N. B. Kompankov, N. P. Martin, M. Nyman, P. A. Abramov and M. N. Sokolov, New J. Chem., 2019, 43, 9943 DOI: 10.1039/C9NJ01907C

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