Functional supramolecular systems with highly cooperative and responding properties

Area of Science:

• Supramolecular Chemistry
• Coordination Chemistry
• Materials Science

Background:

• Host-guest interactions dynamically regulate molecular functions in biological systems.
• Artificial metallo-supramolecular systems leverage metal complexes for cooperative and responsive functions.

Purpose of the Study:

• To review artificial metallo-supramolecular systems with cooperative and responsive functions.
• To highlight the use of metal ions as effectors in pseudomacrocycles for guest recognition.
• To introduce novel multimetal cooperative hosts.

Main Methods:

• Synthesis of pseudomacrocycles (pseudocrown ethers, pseudocryptands) to control guest recognition.
• Utilizing metal ions as effectors to achieve allosteric effects.
• Designing linear bis-salamo ligands for multimetal cooperative hosts.
• Investigating transmetalation in multinuclear metal complexes.

Main Results:

• Achieved positive and negative allosteric effects in pseudomacrocycles for guest recognition.
• Demonstrated highly cooperative stepwise regulation of anion affinity using pseudocryptands and salt-binding hosts.
• Formed a trinuclear zinc complex cooperatively, with selective transmetalation of the central zinc ion by lanthanide and calcium ions.

Conclusions:

• Artificial metallo-supramolecular systems provide tunable platforms for complex molecular functions.
• Metal ions are crucial effectors in designing sophisticated host-guest systems with allosteric properties.
• Novel ligand designs enable the construction of cooperative multimetal hosts with selective metal exchange capabilities.