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Terephthalic acid (TPA) deposited on Si(111)-7 × 7, Si(111)--Ag and Ag(111) has been studied as a model system to understand how much passivated semiconductor surfaces differ from semiconductor and metal surfaces in respect of supramolecular self assembly. By scanning tunneling microscopy it is found that TPA molecules do not form any ordered supramolecular structure on the pristine semiconductor surface, due to a strong molecule–substrate interaction. On the contrary, TPA has a weaker interaction with Si(111)--Ag, leading to the formation of an ordered supramolecular layer stabilized by carboxyl hydrogen bonds. These structures are very similar to the supramolecular layer of TPA formed on Ag(111), indicating that the two substrates behave similarly for what concerns the adsorption of functional organic molecules. However, the deposition of Fe on the TPA layers on Si(111)--Ag does not induce the formation of two-dimensional metal–organic frameworks which, on the contrary, readily develop on Ag(111). Possible origins of this difference are discussed. [ABSTRACT FROM AUTHOR]

Supramolecular assembly and on-surface synthesis are two widely-used methods for constructing low-dimensional molecular nanostructures on surfaces. Here we describe an approach that combines both methods to create two-dimensional metal-organic networks with exceptionally large pores. [ABSTRACT FROM AUTHOR]

On a Au(111) surface, a mixture of two types of molecular ligands assembles with Cu generating two homogeneous and one heterogeneous metallo-supramolecular structures owing to same pyridyl–Cu–pyridyl coordination. The proportion of the three phases in the output structures is regulated by adjusting the ratio of the two components in the input molecular mixture. As the ratio approaches the stoichiometric value of the heterogeneous structure, one of the ligands is 100% incorporated in the heterogeneous phase, manifesting a unique amplification behaviour in this multiple output self-assembly. [ABSTRACT FROM AUTHOR]

Two-dimensional metal-organic coordination networks at a Cu(100) surface are transformed to a new supramolecular structure with one-dimensional coordination character by the addition of a second organic ligand [ABSTRACT FROM AUTHOR]

Two-dimensional metal–organic coordination networks at a Cu(100) surface are transformed to a new supramolecular structure with one-dimensional coordination character by the addition of a second organic ligand. [ABSTRACT FROM AUTHOR]