Ring-opening polymerisation of coordination compounds: a silver(I) network with both ring and polymer components

Area of Science:

• Coordination Chemistry
• Supramolecular Chemistry
• Materials Science

Background:

• Terpyridyl ligands are versatile building blocks in coordination chemistry.
• Silver(I) ions readily form diverse coordination networks.
• Understanding the self-assembly of metal-ligand complexes is crucial for materials design.

Purpose of the Study:

• To synthesize and characterize novel silver(I) complexes with a specific terpyridyl ligand.
• To investigate the structural diversity, including macrocyclic and polymeric formations, of these complexes.
• To explore the coordination behavior of the terpyridyl ligand with silver(I) ions.

Main Methods:

• Synthesis of silver(I) complexes using the terpyridyl ligand and silver(I) salts (e.g., silver tetrafluoroborate, silver triflate).
• Single-crystal X-ray diffraction analysis to determine the solid-state structures of the complexes.
• Characterization of the resulting coordination networks, identifying macrocyclic and polymeric units.

Main Results:

• Successful synthesis of two distinct silver(I) complexes: [Ag2(1)2][BF4]2 and [{Ag3(1)2}n][CF3SO3]3n.
• Complex 2 features discrete macrocyclic units ([Ag2(mu-1)2]2+).
• Complex 3 forms a ring-opened polymeric network ([{Ag(mu-1)}n]n+).

Conclusions:

• The terpyridyl ligand (1) demonstrates flexibility in coordinating with silver(I) ions to form varied supramolecular architectures.
• The counterions (BF4- and CF3SO3-) influence the final network topology.
• This work highlights the potential for designing complex coordination structures through judicious choice of metal ions and ligands.