Author:

Keywords:

scanning-tunneling-microscopy, liquid-solid interface, hexa-peri-hexabenzocoronene, polycyclic aromatic-hydrocarbons, 2-dimensional molecular network, shape-persistent macrocycles, solvent-induced polymorphism, alkyl chain interdigitation, oriented pyrolytic-graphite, selective guest inclusion, Science & Technology, Physical Sciences, Chemistry, Multidisciplinary, Chemistry, LIQUID-SOLID INTERFACE, SCANNING-TUNNELING-MICROSCOPY, HEXA-PERI-HEXABENZOCORONENE, SHAPE-PERSISTENT MACROCYCLES, NANOPOROUS NETWORKS, MOLECULAR NETWORKS, PHASE SEGREGATION, PHOTOPHYSICAL PROPERTIES, COMPETITIVE ADSORPTION, SPOKED WHEELS, 03 Chemical Sciences, Organic Chemistry, 34 Chemical sciences, 40 Engineering

Abstract:

At the liquid/graphite interface triangular and rhombic phenylene-ethynylene macrocycles substituted by alkyl chains self-assemble to form porous two-dimensional (2D) molecular networks of honeycomb and Kagome types, respectively, or close-packed non-porous structures via alkyl chain interdigitation as the directional intermolecular linkages. Factors that affect the formation of the 2D molecular networks, such as alkyl chain length, solvent, solute concentration, and co-adsorption of guest molecules, were elucidated through a systematic study. For the porous networks, various molecules and molecular clusters were adsorbed in the pores reflecting the size and shape complementarity, exploring a new field of 2D host-guest chemistry.