Related Experiment Video
Updated: Jan 12, 2026
08:25
Chemical Vapor Deposition of an Organic Magnet, Vanadium Tetracyanoethylene
Published on: July 3, 2015
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Engineering Magnetic Bistability: Solvent-Driven Photoresponsive Single-Chain Magnet Behavior in Fe2Co Coordination
Ranjan Kharel1, Jyoti Yadav1, Sanjit Konar1
1Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal, Madhya Pradesh 462066, India.
JACS Au
|October 31, 2025
Summary
Solvent molecules control magnetic behavior in iron-cobalt chains, enabling photoresponsive single-chain magnets (SCMs) with potential for data storage. This solvent-directed approach tunes magnetic properties for advanced materials.
Area of Science:
- Materials Science
- Magnetism
- Supramolecular Chemistry
Background:
- Single-chain magnets (SCMs) are promising for data storage due to slow magnetic relaxation.
- Photoresponsive SCMs are sought after, but integrating photoswitchable units like electron transfer coupled spin transition (ETCST) or spin crossover (SCO) is challenging and doesn't guarantee SCM behavior.
Purpose of the Study:
- To demonstrate solvent-directed control over magnetic properties in isostructural cyanide-bridged Fe2Co 1D chains.
- To investigate the influence of solvent molecules on achieving photoresponsive single-chain magnet behavior.
Main Methods:
- Synthesis of isostructural cyanide-bridged Fe2Co 1D chains with varying solvent molecules (A/B).
- Characterization of magnetic properties, including thermal and light-induced bistability, of the synthesized complexes.
- Analysis of crystal packing and intermolecular interactions (hydrogen bonding, π···π, CH···π) influenced by solvent molecules.
Main Results:
- Complexes 1·5H2O and 2·EtOH·1.5H2O exhibit photoactivated SCM behavior due to solvent-directed crystal packing.
- Complex 3·iPrOH·1.5H2O remains a nonresponsive SCM due to intrinsic paramagnetism.
- Intrachain ferromagnetic interactions result in high energy barriers for magnetization reversal and magnetic coercivity.
Conclusions:
- Solvent molecules play a crucial role in tuning the photoresponsive magnetic properties of Fe2Co 1D chains.
- Solvent-driven crystal packing and intermolecular interactions are key to designing next-generation stimuli-responsive molecular magnets.
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