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Related Experiment Video

Updated: May 14, 2026

Discovery and Synthesis Optimization of Isoreticular Al(III) Phosphonate-Based Metal-Organic Framework Compounds Using High-Throughput Methods

Discovery and Synthesis Optimization of Isoreticular Al(III) Phosphonate-Based Metal-Organic Framework Compounds Using High-Throughput Methods

Published on: October 6, 2023

An unprecedented Fe(36) phosphonate cage.

Christine M Beavers¹, Andrey V Prosvirin, Andrey V Prosverin

¹Department of Chemistry, La Trobe Institute for Molecular Sciences, Melbourne, Australia 3086.

Inorganic Chemistry

|January 29, 2013

Summary

Researchers synthesized the largest interconnected iron cage to date using 2-pyridylphosphonic acid and iron salts. Magnetic studies revealed antiferromagnetic coupling between iron ions within this novel ferric cage structure.

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Experimental Approaches for the Synthesis of Low-Valent Metal-Organic Frameworks from Multitopic Phosphine Linkers

Experimental Approaches for the Synthesis of Low-Valent Metal-Organic Frameworks from Multitopic Phosphine Linkers

Published on: May 12, 2023

Area of Science:

Coordination Chemistry
Supramolecular Chemistry
Materials Science

Background:

Polynuclear iron cages are of interest for their magnetic properties and potential applications.
The synthesis of large, interconnected cage structures remains a synthetic challenge.

Purpose of the Study:

To synthesize and characterize a novel, large, interconnected, polynuclear iron cage.
To investigate the magnetic properties of the synthesized iron cage.

Main Methods:

Reaction of 2-pyridylphosphonic acid (LH(2)) with iron(II) perchlorate and iron(III) nitrate.
Characterization of the resulting iron cage complex.
Magnetic susceptibility studies to determine magnetic coupling.

Main Results:

Formation of an unprecedentedly large, interconnected, double-layered, cationic iron cage: [{Fe(36)L(44)(H(2)O)(48)}](20+) (1a).
The synthesized cage is the largest interconnected polynuclear ferric cage reported to date.
Magnetic studies revealed antiferromagnetic coupling between adjacent Fe(III) ions within the cage.

Conclusions:

The successful synthesis of a record-breaking iron cage demonstrates new possibilities in supramolecular chemistry.
The observed antiferromagnetic coupling provides insights into magnetic interactions in polynuclear iron systems.