| Abstract
| - Oligomers based on an o-phenylene ethynylene (oPE) backbone with polar substituents havebeen synthesized using Sonogashira methods. Folding of these extremely short oligomers was confirmedvia 1D and 2D (NOESY) NMR methods. Utilizing electron-rich and electron-poor phenylene building blocks,variations of these oPE oligomers have been synthesized to determine the folded stability of π-rich vsπ-poor vs π-rich−π-poor systems. Slight variations in temperature offer a route, aside from solventdenaturation, to probe the stability of the folded structure. This is the first report of an NMR solutioncharacterization of folding for a PE backbone without hydrogen bonds.
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