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Updated: Mar 27, 2026
11:54
Ligand-Mediated Nucleation and Growth of Palladium Metal Nanoparticles
Published on: June 25, 2018
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Unlocking Heterobimetallic Architectures in a Symmetric PNNP Ligand Environment
Stanislav Melnikov1, Menne W P Verkooijen1, Jop Verduin1
1Organic Chemistry and Catalysis, Institute For Sustainable and Circular Chemistry, Faculty of Science, Utrecht University, Utrecht, The Netherlands.
Chemistry (Weinheim an Der Bergstrasse, Germany)
|March 25, 2026
Summary
This study introduces a symmetric PNNP ligand for creating heterobimetallic complexes. Ligand deprotonation controllably tunes metal-metal distances, enabling new possibilities in bimetallic cooperation.
Area of Science:
- Inorganic Chemistry
- Catalysis
- Materials Science
Background:
- Bimetallic cooperation is crucial for catalysis, requiring close metal-metal proximity.
- Synthesizing such complexes often necessitates asymmetric ligands, posing challenges.
Purpose of the Study:
- To develop a symmetric ligand scaffold for constructing heterobimetallic complexes.
- To investigate the effect of ligand deprotonation on metal-metal distances and electronic communication.
Main Methods:
- Stepwise synthesis of RuRu, ZnRu, and CoRu complexes using a mononuclear Ru(II) precursor.
- Structural characterization via X-ray crystallography.
- Electronic analysis using Density Functional Theory (DFT) and Quantum Theory of Atoms in Molecules (QTAIM).
Main Results:
- A symmetric PNNP ligand successfully supported heterobimetallic ZnRu and CoRu complexes.
- Ligand deprotonation induced significant metal-metal distance contraction via dearomatization.
- DFT/QTAIM analysis revealed a metallophilic interaction in the CoRu complex but not in the ZnRu analogue.
Conclusions:
- The symmetric PNNP ligand is a versatile platform for heterobimetallic complex assembly.
- Controlled ligand deprotonation offers a facile method to tune metal-metal separation and electronic coupling.
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