Speciation of Tellurium(VI) in Aqueous Solutions: Identification of Trinuclear Tellurates by 17O, 123Te, and 125Te NMR Spectroscopy

Alexander G. Medvedev; Oleg Yu Savelyev; Dmitry P. Krut’ko; Alexey A. Mikhaylov; Ovadia Lev; Petr V. Prikhodchenko

doi:10.3390/molecules27248654

Speciation of Tellurium(VI) in Aqueous Solutions: Identification of Trinuclear Tellurates by ¹⁷O, ¹²³Te, and ¹²⁵Te NMR Spectroscopy

Alexander G. Medvedev, Oleg Yu Savelyev, Dmitry P. Krut’ko, Alexey A. Mikhaylov, Ovadia Lev^*, Petr V. Prikhodchenko^*

^*Corresponding author for this work

Institute of Chemistry

Research output: Contribution to journal › Article › peer-review

Abstract

Tellurates have attracted the attention of researchers over the past decade due to their properties and as less toxic forms of tellurium derivatives. However, the speciation of Te(VI) in aqueous solutions has not been comprehensively studied. We present a study of the equilibrium speciation of tellurates in aqueous solutions at a wide pH range, 2.5–15 by ¹⁷O, ¹²³Te, and ¹²⁵Te NMR spectroscopy. The coexistence of monomeric, dimeric, and trimeric oxidotellurate species in chemical equilibrium at a wide pH range has been shown. NMR spectroscopy, DFT computations, and single-crystal X-ray diffraction studies confirmed the formation and coexistence of trimeric tellurate anions with linear and triangular structures. Two cesium tellurates, Cs₂[Te₄O₈(OH)₁₀] and Cs₂[Te₂O₄(OH)₆], were isolated from the solution at pH 5.5 and 9.2, respectively, and studied by single-crystal X-ray diffractometry, revealing dimeric and tetrameric tellurate anions in corresponding crystal structures.

Original language	English
Article number	8654
Journal	Molecules
Volume	27
Issue number	24
DOIs	https://doi.org/10.3390/molecules27248654
State	Published - Dec 2022

Bibliographical note

Publisher Copyright:
© 2022 by the authors.

Keywords

DFT computations
NMR spectroscopy
single-crystal X-ray diffraction
spin-spin coupling
tellurates
trinuclear tellurate

Access to Document

10.3390/molecules27248654

Cite this

@article{cc5bd59387dc444e898ecf72acf9d078,

title = "Speciation of Tellurium(VI) in Aqueous Solutions: Identification of Trinuclear Tellurates by 17O, 123Te, and 125Te NMR Spectroscopy",

abstract = "Tellurates have attracted the attention of researchers over the past decade due to their properties and as less toxic forms of tellurium derivatives. However, the speciation of Te(VI) in aqueous solutions has not been comprehensively studied. We present a study of the equilibrium speciation of tellurates in aqueous solutions at a wide pH range, 2.5–15 by 17O, 123Te, and 125Te NMR spectroscopy. The coexistence of monomeric, dimeric, and trimeric oxidotellurate species in chemical equilibrium at a wide pH range has been shown. NMR spectroscopy, DFT computations, and single-crystal X-ray diffraction studies confirmed the formation and coexistence of trimeric tellurate anions with linear and triangular structures. Two cesium tellurates, Cs2[Te4O8(OH)10] and Cs2[Te2O4(OH)6], were isolated from the solution at pH 5.5 and 9.2, respectively, and studied by single-crystal X-ray diffractometry, revealing dimeric and tetrameric tellurate anions in corresponding crystal structures.",

keywords = "DFT computations, NMR spectroscopy, single-crystal X-ray diffraction, spin-spin coupling, tellurates, trinuclear tellurate",

author = "Medvedev, {Alexander G.} and Savelyev, {Oleg Yu} and Krut{\textquoteright}ko, {Dmitry P.} and Mikhaylov, {Alexey A.} and Ovadia Lev and Prikhodchenko, {Petr V.}",

note = "Publisher Copyright: {\textcopyright} 2022 by the authors.",

year = "2022",

month = dec,

doi = "10.3390/molecules27248654",

language = "אנגלית",

volume = "27",

journal = "Molecules",

issn = "1420-3049",

publisher = "Multidisciplinary Digital Publishing Institute (MDPI)",

number = "24",

}

TY - JOUR

T1 - Speciation of Tellurium(VI) in Aqueous Solutions

T2 - Identification of Trinuclear Tellurates by 17O, 123Te, and 125Te NMR Spectroscopy

AU - Medvedev, Alexander G.

AU - Savelyev, Oleg Yu

AU - Krut’ko, Dmitry P.

AU - Mikhaylov, Alexey A.

AU - Lev, Ovadia

AU - Prikhodchenko, Petr V.

PY - 2022/12

Y1 - 2022/12

N2 - Tellurates have attracted the attention of researchers over the past decade due to their properties and as less toxic forms of tellurium derivatives. However, the speciation of Te(VI) in aqueous solutions has not been comprehensively studied. We present a study of the equilibrium speciation of tellurates in aqueous solutions at a wide pH range, 2.5–15 by 17O, 123Te, and 125Te NMR spectroscopy. The coexistence of monomeric, dimeric, and trimeric oxidotellurate species in chemical equilibrium at a wide pH range has been shown. NMR spectroscopy, DFT computations, and single-crystal X-ray diffraction studies confirmed the formation and coexistence of trimeric tellurate anions with linear and triangular structures. Two cesium tellurates, Cs2[Te4O8(OH)10] and Cs2[Te2O4(OH)6], were isolated from the solution at pH 5.5 and 9.2, respectively, and studied by single-crystal X-ray diffractometry, revealing dimeric and tetrameric tellurate anions in corresponding crystal structures.

AB - Tellurates have attracted the attention of researchers over the past decade due to their properties and as less toxic forms of tellurium derivatives. However, the speciation of Te(VI) in aqueous solutions has not been comprehensively studied. We present a study of the equilibrium speciation of tellurates in aqueous solutions at a wide pH range, 2.5–15 by 17O, 123Te, and 125Te NMR spectroscopy. The coexistence of monomeric, dimeric, and trimeric oxidotellurate species in chemical equilibrium at a wide pH range has been shown. NMR spectroscopy, DFT computations, and single-crystal X-ray diffraction studies confirmed the formation and coexistence of trimeric tellurate anions with linear and triangular structures. Two cesium tellurates, Cs2[Te4O8(OH)10] and Cs2[Te2O4(OH)6], were isolated from the solution at pH 5.5 and 9.2, respectively, and studied by single-crystal X-ray diffractometry, revealing dimeric and tetrameric tellurate anions in corresponding crystal structures.

KW - DFT computations

KW - NMR spectroscopy

KW - single-crystal X-ray diffraction

KW - spin-spin coupling

KW - tellurates

KW - trinuclear tellurate

UR - http://www.scopus.com/inward/record.url?scp=85144492769&partnerID=8YFLogxK

U2 - 10.3390/molecules27248654

DO - 10.3390/molecules27248654

M3 - ???researchoutput.researchoutputtypes.contributiontojournal.article???

C2 - 36557790

AN - SCOPUS:85144492769

SN - 1420-3049

VL - 27

JO - Molecules

JF - Molecules

IS - 24

M1 - 8654

ER -