Responsive supramolecular polymer metallogel constructed by orthogonal coordination-driven self-assembly and...

Area of Science:

• Supramolecular chemistry
• Materials science
• Polymer chemistry

Background:

• Hierarchical self-assembly is key for advanced supramolecular materials.
• Orthogonal interactions enable the creation of novel species with unique properties.

Purpose of the Study:

• To unify metal-ligand coordination and host/guest chemistry.
• To develop a 3D supramolecular polymer network (SPN) with tunable properties.

Main Methods:

• Preparation of a dipyridyl donor with a crown ether moiety.
• Coordination-driven self-assembly with an organoplatinum acceptor to form hexagonal metallacycles.
• Polymerization via host/guest interactions with a bisammonium salt to create a 3D SPN.

Main Results:

• Successful formation of hexagonal metallacycles and their subsequent polymerization into a 3D SPN.
• The 3D SPN forms a gel at high concentrations, cross-linked by metallohexagons.
• Reversible thermo- and cation-induced gel-sol transitions were observed.

Conclusions:

• Demonstrates the power of hierarchical self-assembly by combining coordination and host/guest chemistry.
• Highlights the dynamic and tunable nature of the resulting supramolecular materials.
• Paves the way for designing complex supramolecular architectures with responsive properties.