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Synthesis of Bimetallic Pt/Sn-based Nanoparticles in Ionic Liquids
Published on: August 23, 2018
Ordered bimetallic coordination networks featuring rare earth and silver cations.
1Institute of Inorganic Chemistry, RWTH Aachen University, Aachen, Germany.
Dalton Transactions (Cambridge, England : 2003)
|March 3, 2012
Summary
Researchers synthesized lanthanide complexes using a 3-cyanopentane-2,4-dionate ligand. These complexes transform into novel silver-lanthanide extended structures, forming stable, solvent-free 3D networks upon aging.
Area of Science:
- Coordination Chemistry
- Materials Science
- Lanthanide Chemistry
Background:
- Lanthanide complexes with ditopic ligands are of interest for their diverse structural and electronic properties.
- The ditopic ligand 3-cyanopentane-2,4-dionate (acacCN) offers potential coordination sites for metal ions.
Purpose of the Study:
- To synthesize and structurally characterize novel lanthanide complexes with the acacCN ligand.
- To investigate the structural transformations of these complexes upon reaction with silver salts.
- To explore the formation of extended heterometallic networks.
Main Methods:
- Synthesis of lanthanide complexes.
- Single-crystal X-ray diffraction for structural characterization.
- Reactions with silver hexafluorophosphate (AgPF6) to form extended structures.
- Analysis of structural changes and aging processes.
Main Results:
- Three lanthanide complexes (Ce, Eu, Yb) with acacCN were synthesized, exhibiting different coordination numbers (nine for Ce, eight for Eu and Yb).
- Reaction with AgPF6 led to the formation of neutral extended structures where cyanide moieties coordinate to silver.
- Initially formed networks with solvent molecules or water evolved into stable, solvent-free 3D networks of Ln(acacCN)4Ag through an aging process.
Conclusions:
- The coordination environment of lanthanide ions can be tuned by ligand choice and reaction conditions.
- Lanthanide-cyanide complexes can serve as precursors for novel silver-lanthanide heterometallic frameworks.
- The aging process is crucial for obtaining stable, solvent-free 3D network structures.
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