10.1021/la1040079.s001 Zhongcheng Mu Zhongcheng Mu Lijin Shu Lijin Shu Harald Fuchs Harald Fuchs Marcel Mayor Marcel Mayor Lifeng Chi Lifeng Chi Two-Dimensional Self-Assembly of Linear Molecular Rods at the Liquid/Solid Interface American Chemical Society 2011 lamellar axis dodecyl chains form core rows alkyl chain rows benzene subunits perfluorinated benzene Linear Molecular Rods STM molecule unsubstituted ones change para position lamellar structures arrangement interaction scanning tunneling microscopy phenyl ring terminal dodecyl chains fluoro substituents 2011-02-15 00:00:00 Journal contribution https://acs.figshare.com/articles/journal_contribution/Two_Dimensional_Self_Assembly_of_Linear_Molecular_Rods_at_the_Liquid_Solid_Interface/2692117 We report on the synthesis and scanning tunneling microscopy (STM) studies of a series of linear molecular rods (<b>1</b>−<b>5</b>) comprising different numbers and/or spatial arrangements of perfluorinated benzene and benzene subunits interlinked with diacetylenes in the para position and decorated with or without terminal dodecyl chains. The molecules organize themselves into well-ordered 2D crystal structures at the liquid/solid interface through intermolecular and molecule−substrate interactions. Whereas the molecules substituted by dodecyl chains form the lamellar structures with alternating rigid core rows and alkyl chain rows, the unsubstituted ones change the orientation of the rigid backbones with respect to the lamellar axis. The molecular arrangement is not influenced by fluoro substituents on any phenyl ring of the backbone, which suggests that the interactions between the π-conjugated backbones are dominated by close packing rather than by the dipole moments of the rods or fluorine-based intermolecular interactions.