Incorporation of a flexible, pyridine-functionalized Diaza-crown ether into discrete supramolecules via coordination-driven self-assembly |
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Authors: | Chi Ki-Whan Addicott Chris Stang Peter J |
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Affiliation: | Department of Chemistry, University of Utah, 315 S. 1400 E. Salt Lake City, Utah 84112, USA. |
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Abstract: | A flexible, pyridine-functionalized diaza-crown ether was self-assembled into discrete supramolecules of differing stoichiometries upon combination with various organoplatinum molecules. They are characterized by electrospray ionization mass spectrometry and (31)P[(1)H] and (1)H NMR. In one case, (1)H-(1)H NOE enhancements of a [1 + 1] assembled structure demonstrate the puckered shape of the macrocyclic ring. Despite its inherent flexibility, the dipyridyl-substituted 18-membered diaza-crown ligand prefers to self-assemble into closed systems when reacted with platinum-containing acceptors. |
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