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The Contractile Ring

The Contractile Ring

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The Contractile Ring

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Metal-Ligand Bonds

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Olefin Metathesis Polymerization: Ring-Opening Metathesis Polymerization (ROMP)

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Plastic Deformation in Circular Shafts

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Related Experiment Video

Updated: Jun 18, 2026

Directed Cellular Self-Assembly to Fabricate Cell-Derived Tissue Rings for Biomechanical Analysis and Tissue Engineering

Directed Cellular Self-Assembly to Fabricate Cell-Derived Tissue Rings for Biomechanical Analysis and Tissue Engineering

Published on: November 25, 2011

Giant Enlarged Circular Metallo-Rings.

Yi Liu¹, Chaolun Wei¹, Xiao Sun¹

¹Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell Technology, School of Energy Science and Technology, Liaocheng University, Liaocheng 252059, P. R. China.

Inorganic Chemistry

|June 16, 2026

Summary

This summary is machine-generated.

Researchers synthesized novel dysprosium rings using oxalate, carbonate, and acetate. These complex metallosupramolecular structures show unique topologies and influence magnetic relaxation properties.

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Area of Science:

Coordination Chemistry
Supramolecular Chemistry
Materials Science

Background:

The synthesis of complex metallosupramolecular structures is crucial for developing advanced materials with tailored properties.
Dysprosium-based clusters are of interest due to their potential magnetic and catalytic applications.
Controlling the topology and composition of polynuclear rings remains a synthetic challenge.

Purpose of the Study:

To synthesize novel homononanuclear and heterooctaoctacontanuclear dysprosium rings.
To investigate the influence of specific ligands and ions (oxalate, carbonate, acetate, sodium) on the resulting structures.
To explore the relationship between structural modifications and magnetic relaxation behavior.

Main Methods:

Utilized a C2-symmetric bis(hydrazone) ligand scaffold with tert-butyl substituents.
Incorporated 3d ions, oxalate, carbonate, and sodium ions during synthesis.
Characterized the synthesized compounds (Dy9 and Dy48Zn24Na16) using structural and magnetic analyses.

Main Results:

Successfully synthesized a homononanuclear dysprosium ring (Dy9) and a large heterometallic ring (Dy48Zn24Na16).
Observed distinct single- and triple-stranded cyclic topologies with varying ligand conformations and metal coordination modes.
Demonstrated that structural modifications significantly impact the zero-field magnetic relaxation dynamics.

Conclusions:

Developed a new synthetic strategy for constructing oxoanion-bridged heterometallic metallosupramolecular rings.
Highlighted the role of oxalate, carbonate, and acetate as templating agents in directing the assembly of complex structures.
Established a link between the intricate structures of these dysprosium rings and their magnetic properties, paving the way for future magnetic dynamic studies.