Linear array of cesium atoms assisted by uracil molecules on Au(111).

Based on STM imaging and DFT calculations, we demonstrate that it is feasible to construct a series of metal-organic U + Cs structures composed of configuration-adjustable multiple-metal-center motifs, which is the consequence of the synergy and competition between hydrogen bonds and ionic bonds. Moreover, assisted by U molecules, the central Cs cations tend to form linear arrays.