Coordination polymers from kinetically labile copper(I) and silver(I) complexes: true macromolecules or solution aggregates?

Metallosupramolecular Architectures Formed with Ferrocene-Linked Bis-Bidentate Ligands: Synthesis, Structures, and Electrochemical Studies

“…However, given that each complex displays similar solution data, it seems likely that all of the Cu­(I) complexes are coordination polymers (i.e., [Cu n ( L ) n ]­(PF 6 ) n ). While [2 + 2] double-stranded metallohelicates were obtained previously when related 1,1′-disubstituted ferrocene bis-bidentate ligands were reacted with Cu­(I) ions, the formation of Cu­(I) coordination polymers has been observed with more rigid bis-bidentate N–N ligands . In order for L1 – L3 to form [2 + 2] double-stranded metallohelicates with the Cu­(I) ion, the ligands would need to rotate into the anti (open) conformer.…”

Transition metal ions: weak links for strong polymers

“…As Rehahn and Lahn pointed out in 2001, well-defined polymers from kinetically labile metal complexes are still nearly unknown, however, by now several different systems are available that allow characterization of polymer properties in solution. 82 The analysis and characterization of thermodynamic and kinetic fundamentals of these dynamic materials at molecular levels remains a central challenge. In particular, methods have to be improved and innovated that allow studying these materials without perturbing the equilibrium and its equilibrium structure, be it by increasing the concentration to enhance signal intensity or to add electrolyte to avoid ordering through long range electrostatic interactions.…”

Supramolecular Polymers: Historical Development, Preparation, Characterization, and Functions

“…On the basis of this research, Rehahn et al also studied a series of MSPs with different metal ions, including copper(I) and silver(I), and different structures of ophenanthroline-based bisbidentate ligands. 61,62 These systems could be considered supramolecular polymers in coordinating solvent, although they do not show supramolecular behavior in noncoordinating solvent.…”