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Issue 2, 2010
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Apolar ortho-phenylene ethynylene oligomers: conformational ordering without intermolecular aggregation

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Abstract

This paper describes the characterization of solvent induced folding behavior for non-polar (NP) alkoxy substituted ortho-phenylene ethynylene (o-PE) oligomers. Oligomers of lengths up to nine units have been shown to adopt helical conformations in heptane by NMR and CD spectroscopy, while chloroform promotes extended conformations. Surprisingly, the molar ellipticity values found in heptane for these oligomers are very small compared to other literature values of meta-phenylene ethynylene (m-PE) folded systems; however, comparable molar ellipticity values were found for a closed macrocyclic o-PE suggesting the weak ellipticity is a molecular-feature rather than a quality of folding indicator.

Graphical abstract: Apolar ortho-phenylene ethynylene oligomers: conformational ordering without intermolecular aggregation

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Publication details

The article was received on 19 May 2009, accepted on 27 Sep 2009 and first published on 24 Nov 2009


Article type: Paper
DOI: 10.1039/B9NJ00200F
New J. Chem., 2010,34, 307-312

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    Apolar ortho-phenylene ethynylene oligomers: conformational ordering without intermolecular aggregation

    J. Jiang, M. M. Slutsky, T. V. Jones and G. N. Tew, New J. Chem., 2010, 34, 307
    DOI: 10.1039/B9NJ00200F

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