文摘
When reacted with undecane-1,11-dicarboxylic acid under solvo-hydrothermal conditions in the presence of Mn(II) cations and 1,10-phenanthroline, uranyl ions give two-dimensional honeycomb networks which assemble to form a 3-fold Borromean entanglement. This structure is closely related to that of the helicates previously obtained with the shorter dodecanedioic acid. Replacement of 1,10-phenanthroline by 2,2′-bipyridine leads to the formation of a neutral one-dimensional heterometallic polymer.