Mn-coordinated stillbenedicarboxylic ligand supramolecule regulated by the herringbone reconstruction of Au(111)

The fabrication of Mn-coordinated metal - organic networks on the reconstructed Au(111) surface was investigated by scanning tunneling microscopy(STM), with stillbenedicarboxylic acid (SDA) as the linker molecules. Two network phases have been observed, sorted by the geometry of node Mn atoms with a parallel or a perpendicular geometry with regard to the adjacent units. A commensurate ordering of the networks with the substrate herringbone reconstructions was identified. The periodic alterations of the Mn unit geometry may provide us with clear evidence of the modulation effects from the substrate reconstructions. A ladder structure was obtained for a SDA oversaturated surface, which revealed another coordination interaction between the Mn atoms and the SDA molecules.