Synthesis and Characterization of Ferrocene Based Hemicages

Area of Science:

• Supramolecular Chemistry
• Coordination Chemistry
• Organic Synthesis

Background:

• Tripodal ligands are crucial building blocks in supramolecular chemistry.
• Coordination-driven dynamic combinational chemistry offers a powerful route to complex architectures.
• Ferrocene units can impart unique properties and flexibility to molecular structures.

Purpose of the Study:

• To synthesize and characterize novel hemicage structures using tripodal ligands.
• To investigate the role of ferrocene flexibility in hemicage formation.
• To demonstrate the host-guest capabilities of the constructed hemicages.

Main Methods:

• Synthesis of tripodal ligands (L1-3).
• Coordination-driven dynamic combinational chemistry for hemicage (C1-3) assembly.
• Characterization using Nuclear Magnetic Resonance (NMR) spectroscopy (1H, 1H-1H COSY, DOSY) and Mass Spectrometry (ESI-TWIM-MS).
• Host-guest studies with adamantane.

Main Results:

• Successfully synthesized tripodal ligands L1-3.
• Formation of hemicages C1-3 confirmed by spectroscopic and mass spectrometry techniques.
• Flexible ferrocene units were found to be essential for adaptable directionality during assembly.
• Hemicage C2 demonstrated a well-defined internal cavity capable of encapsulating adamantane.

Conclusions:

• Tripodal ligands can self-assemble into hemicage structures via coordination-driven chemistry.
• The inherent flexibility of ferrocene moieties is key to constructing these adaptable supramolecular architectures.
• The synthesized hemicages possess functional binding pockets suitable for molecular encapsulation.