Endohedrally Functionalized Heteroleptic Coordination Cages for Phosphate Ester Binding

Area of Science:

• Supramolecular Chemistry
• Coordination Chemistry
• Nanotechnology

Background:

• Traditional metallosupramolecular hosts often use a single ligand type, limiting structural diversity and functionalization.
• Developing hosts with tailored cavities and specific binding capabilities is crucial for applications in catalysis and molecular recognition.

Purpose of the Study:

• To synthesize and characterize novel heteroleptic [Pd2A2B2] coordination cages.
• To explore the self-assembly of cages from shape-complementary bis-monodentate ligands.
• To investigate the binding affinities of these cages for phosphate diester guests.

Main Methods:

• Non-statistical self-assembly of heteroleptic coordination cages using palladium(II) ions.
• Synthesis and characterization of ligands A (with NH function) and ligands B (with varied aromatic backbones).
• Guest binding studies with phosphate diesters and all-atom molecular dynamics simulations.

Main Results:

• Successful formation of heteroleptic [Pd2A2B2] coordination cages with diverse ligand combinations.
• Demonstrated ability of the cages to selectively bind phosphate diesters.
• Molecular dynamics simulations provided insights into guest binding mechanisms and affinities.

Conclusions:

• Heteroleptic coordination cages offer greater structural and functional diversity compared to homoleptic counterparts.
• The developed cages show promise as selective receptors for phosphate diesters.
• This work expands the toolkit for designing advanced metallosupramolecular hosts.