A New Synthetic Route to Bis(amidinate) Ligands as Flexible Scaffolds for Group 11 Metal Clusters
Disciplines
Inorganic Chemistry | Materials Chemistry
Abstract (300 words maximum)
Polydentate bis(amidinate) ligands have emerged as effective scaffolds for the construction of multinuclear Group 11 metal clusters, capable of promoting closed-shell d¹⁰···d¹⁰ metallophilic interactions. Such clusters yield luminescent assemblies with tunable photophysical properties. Building on prior works of tetradentate bis(amidinate) ligands which generate Cu1 clusters exhibiting blue to green emissions via precise control of metal–metal distances, this project investigates the synthesis and structural characterization of a new ethylene-bridged bis(amidine) ligand designed to allow for linear geometric Cu1 cluster formation. This ligand incorporates aryl substituents at the amidine moieties to reduce steric hindrance and promote EE (anti/anti) configurations essential for a linear arrangement of Cu1 ions. The new bis(amidine) will be characterized by single-crystal X-ray diffraction and multidimensional NMR spectroscopy, complemented by elemental analysis and FTIR spectroscopy to confirm molecular geometry. This investigation aims to deepen the understanding of ligand-controlled metallophilicity and to advance the rational design of molecular Cu1 wires and photoactive materials relevant to optoelectronics and nanoarchitectures.
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Academic department under which the project should be listed
CSM – Chemistry and Biochemistry
Primary Investigator (PI) Name
Michael Stollenz
A New Synthetic Route to Bis(amidinate) Ligands as Flexible Scaffolds for Group 11 Metal Clusters
Polydentate bis(amidinate) ligands have emerged as effective scaffolds for the construction of multinuclear Group 11 metal clusters, capable of promoting closed-shell d¹⁰···d¹⁰ metallophilic interactions. Such clusters yield luminescent assemblies with tunable photophysical properties. Building on prior works of tetradentate bis(amidinate) ligands which generate Cu1 clusters exhibiting blue to green emissions via precise control of metal–metal distances, this project investigates the synthesis and structural characterization of a new ethylene-bridged bis(amidine) ligand designed to allow for linear geometric Cu1 cluster formation. This ligand incorporates aryl substituents at the amidine moieties to reduce steric hindrance and promote EE (anti/anti) configurations essential for a linear arrangement of Cu1 ions. The new bis(amidine) will be characterized by single-crystal X-ray diffraction and multidimensional NMR spectroscopy, complemented by elemental analysis and FTIR spectroscopy to confirm molecular geometry. This investigation aims to deepen the understanding of ligand-controlled metallophilicity and to advance the rational design of molecular Cu1 wires and photoactive materials relevant to optoelectronics and nanoarchitectures.