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Published on: July 27, 2022
Rhenium(I)-based bridgeless double metallocalix[4]arenes
Palani Elumalai1, Rajendiran Kanagaraj, Rajendiran Marimuthu
1School of Chemistry, University of Hyderabad, Hyderabad 500 046, India. msathi@uohyd.ac.in.
Bridgeless double metallocalixarenes with two dinuclear cavitands were synthesized using a one-pot method. This approach combined a rhenium precursor, a rigid OO donor ligand, and a flexible NN donor ligand.
Area of Science:
- Supramolecular Chemistry
- Organometallic Chemistry
- Coordination Chemistry
Background:
- Metallocalixarenes are macrocyclic compounds incorporating metal ions.
- Cavitands are molecules with a rigid, basket-like structure.
- Bridgeless macrocycles offer unique structural and electronic properties.
Purpose of the Study:
- To synthesize novel bridgeless double metallocalix[4]arenes.
- To investigate the self-assembly of complex supramolecular architectures.
- To explore the utility of dinuclear cavitands in macrocycle formation.
Main Methods:
- One-pot synthesis approach.
- Utilized a rhenium precursor (Re2(CO)10).
- Employed a rigid bis-chelating OO donor ligand (H2-L) and a flexible bis-ditopic NN donor ligand (L').
Main Results:
- Successfully obtained bridgeless double metallocalix[4]arenes.
- The resulting structures possess two orthogonally arranged dinuclear cavitands.
- Demonstrated a facile method for constructing complex metallosupramolecular systems.
Conclusions:
- The one-pot strategy is effective for synthesizing intricate metallocalixarene structures.
- Orthogonally arranged dinuclear cavitands can be controllably incorporated into macrocyclic frameworks.
- This work expands the scope of accessible metallosupramolecular cages.
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