HOPG surfaces, supramolecular structure

Depending on the interdigitation directions of the alkoxy chains, supramolecular chirality of a porous structure is generated on surfaces. Based on the interdigitation pattern we tentatively call (+)-type at the dimer level, a chiral Cg-symmetric hex-amer in which the inner alkyl chains run in a counterclockwise direction is formed. (See Figure 6.3 in Section 6.5.2.) Conversely, (-)-type interdigitation results in a Cg-hexamer of clockwise chirality. Experimentally, the domains of chiral networks co-exist in equal numbers for the achiral DBA-OCn molecules. However, by simple modification of the alkoxy chain, we were able to create homochiral porous networks at the liquid-HOPG interface."... 

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