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Updated: Aug 6, 2026
09:56
High Resolution Physical Characterization of Single Metallic Nanoparticles
Published on: June 28, 2019
Structural and spectroscopic characterization of a Tb(IV) polyoxometalate
Primadi J Subintoro1, Brett Lottes1,2, Felipe A Pereiro2,3
1Department of Chemistry, University of Iowa, Iowa City, IA, USA.
Nature Communications
|July 16, 2026
Summary
Researchers achieved tetravalent terbium (Tb(IV)) in aqueous conditions using polyoxometalates. This breakthrough advances high-valent lanthanide chemistry towards ambient and water-stable complexes.
Area of Science:
- Inorganic Chemistry
- Lanthanide Chemistry
- Polyoxometalate Chemistry
Background:
- High-valent lanthanide chemistry has seen a resurgence, yielding tetravalent praseodymium and terbium in molecular systems.
- Current successes rely on specialized ligands for stability in non-aqueous environments.
Purpose of the Study:
- To achieve stable tetravalent terbium (Tb(IV)) complexes under ambient and aqueous conditions.
- To demonstrate the potential of polyoxometalates in stabilizing high-valent lanthanides in water.
Main Methods:
- Synthesis and single-crystal structure determination of a novel Tb(IV)-polyoxometalate complex.
- Characterization using UV-Vis-NIR, X-ray absorption near edge spectroscopy (XANES), electron paramagnetic resonance (EPR) spectroscopy, and SQUID magnetometry.
Main Results:
- Definitive evidence for Tb(IV) in a molecular system under aqueous conditions was obtained.
- The single crystal structure of K16Tb(IV)(P2W17O61)2•39.85H2O (Tb(IV)W34) was determined.
- Spectroscopic data confirmed the +4 oxidation state of terbium within the W34 complex.
Conclusions:
- This study successfully demonstrates Tb(IV) stability in an aqueous polyoxometalate system.
- The findings represent a significant advancement in developing high-valent lanthanide complexes for aqueous applications.
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