Bis(bipyridine) Ligands in Manganese Carboxylate Cluster Chemistry: Self-Assembly of a Cluster Complex with Two Butterfly-Like [Mn_4(μ_3-O)_2l~(8+) Cores

摘要

Polypyridyl, oligo-2,2'-bipyridine, and related ligands L have received considerable attention ever the last several years. The use of such ligands as "programmed" components in self-assembly reactions with metal ions has been a central theme insupramolecular chemistry, and has led to the formation of a variety of metal/ligand supramolecular ensembles. The latter have fascinating structures such as double or triple helices, and "capped", "cylindrical" and "circular" architectures. The resultingredoxand photophysical properties have also been of interest. In all the work to date the ligands L have been bound to mononuclear centers and they have also been the only (or in some cases, the majority) ligands to the metals.