What question did this study set out to answer?

The goal is to develop a strategy for incorporating lanthanide ions into polyoxoniobate frameworks to create tunable magnetic materials.

April 10, 2026

Ligand-Assisted Assembly of a Family of 3d-4f Cluster-Templated Ln-Polyoxoniobate Cages with a Nested Cuboctahedral/Fullerene-Like Core and Ln-Dependent Magnetism

Key Points

The goal is to develop a strategy for incorporating lanthanide ions into polyoxoniobate frameworks to create tunable magnetic materials.
Developed a ligand-assisted strategy to incorporate lanthanide ions into polyoxoniobate frameworks.
Synthesized a series of Ln-PONb cages stabilized by 3d-4f clusters.
Conducted magnetic studies on the synthesized components to assess magnetism in relation to lanthanide ions.
Synthesized Ln-PONb cages exhibiting a giant Ln4Nb96 supercage with a fullerene-like core.
Observed strong Ln3+-dependent magnetism, with antiferromagnetic coupling in 1-Ce and 1-Nd, and ferromagnetic coupling in 1-La and 1-Pr.

Abstract

A flexible organic ligand-assisted strategy was developed to incorporate lanthanide ions into polyoxoniobate frameworks, yielding a series of Ln-containing polyoxoniobate cages (Ln-PONb cages 1-Ln) stabilized by 3d-4f heterometallic clusters. Compounds 1-Ln feature a giant anionic Ln4Nb96 supercage with an internal Ln4Nb24 cluster displaying a rare fullerene-like topology. These supercages assemble with propeller-like LnCu4 (H4L) 43+ cations via electrostatic interactions to form three-dimensional frameworks. Magnetic studies of 1-Ln (Ln = La, Ce, Pr, Nd) reveal that the magnetic behavior is strongly Ln3+-dependent: 1-Ce and 1-Nd exhibit dominant antiferromagnetic coupling, while 1-La and 1-Pr show ferromagnetic coupling. This work provides a promising strategy for constructing POM-based cage materials with unique topologies and tunable magnetic properties.

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Cite This Study

Lin et al. (Mon,) studied this question.

synapsesocial.com/papers/69d892d16c1944d70ce0406d https://doi.org/https://doi.org/10.1021/acs.inorgchem.6c00253

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