Infrared Spectroelectrochemical Insights into Rhenium-Based Supramolecular Assemblies for Electron Storage and Transfer
Abstract
Three supramolecular square assemblies featuring Re(CO)3Cl nodes and monodentate pyridyl linkers [4,4’-bipyridine, (1a), pyrazine (2a), and 1,2-di(4-pyridyl)ethylene (3a), where a denotes the ground state] were synthesized and studied via infrared spectroelectrochemistry (IR-SEC). IR-SEC revealed that the length of the bridging ligand and degree of electronic coupling in rhenium squares greatly impacts the reduction pathway in both inert and CO2 atmospheres; notably, the squares are capable of interacting with CO2 after only ligand-reduction, thereby avoiding the need for a second reductive event to generate the rhenium anion. This mechanism differs from mononuclear complexes, highlighting how unique redox properties can be endowed by electronic coupling in supramolecular systems.
Fields of Study & Subjects
CO2 Reduction Techniques and Catalysts
Supramolecular Chemistry and Complexes
Synthesis and Properties of Aromatic Compounds
Publication details
- Journal / source
- Inorganic Chemistry
- Publisher
- American Chemical Society (ACS)
- Volume
- 65
- Issue
- 27
- Pages
- 15685–15696
- Publication date
- 26 June 2026
- Language
- EN