Double Subroutine Self-Assembly; Spontaneous Generation of a Nanocyclic Dodecanuclear Cu1 Inorganic Architecture
摘要:
AbstractThe newly synthesised ligand 2 combines binding components known to undergo specific and distinct self‐assembly processes with Cu1 ions. It complexes Cu1 to form, in almost quantitative yield, a large inorganic architecture 1 made up from four ligand molecules and twelve metal ions. The structure of 1 was ascertained by X‐ray radiocrystallography as well as by NMR spectroscopy and electrospray mass spectrometry. It consists of a macrocycle of nanometric dimension with an external diameter of 28 Å; the central cavity has a diameter of 11 Å, which contains four PF−6 anions as well as solvent molecules. The spontaneous formation of 1 results from a self‐assembly process based on a “program” combining two assembly subroutines, each specific to one of the ligand subunits. Self‐assembly through double or, more generally, multiple subroutines can be used to generate a wide variety of highly complex inorganic supramolecular architectures by combination of two or more assembly processes.
A variety of mono-oxidized pyridine, bipyridine, terpyridine, and pyridine/pyridazine are readily prepared under mild conditions using Pyrolusite MnO2. This phase has been characterized by means of X-ray powder diffraction and scanning electron microscopy. The oxidative activity is in keeping with the nature, morphology, and surface area of the MnO2 reagent.