Crystalline assemblies of folded oligomers

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In this work a novel design concept for folded oligomers is presented. The concept involves the insertion of a rigid spacer, the 1,3-bis(ethynylene)benzene unit, into linear alkyl-chain oligomers. Number and position of these spacers determine the molecular conformation of the oligomers in crystalline assemblies. In this way, chain folding is induced on crystallization at the air-water interface and in bulk. The packing arrangements in the crystalline monolayers were determined by grazing inzidence X-ray diffraction.

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