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• W1994900975 abstract "Abstract The folding and chiral aggregation of backbone-rigidified oligo(m-phenylene ethynylenes) were examined using NMR, UV, circular dichromism (CD) and dynamic light scattering (DLS) in methanol and chloroform. Evidence from 2D NMR suggests that backbone-rigidifying intramolecular H-bonds persist in chloroform and methanol, suggesting that these molecules are stably folded in both nonpolar and polar solvents. Results from CD studies further confirmed that longer oligomers (pentamer and hexamer) adopted chiral (helical) conformations. DLS indicated that, in chloroform, the oligomers are fully solvated and exhibited no aggregation; in methanol, these molecules show a size-dependent aggregation, in which a pentamer and a hexamer formed large assemblies while a smaller tetramer showed no detectable aggregation. Keywords: hydrogen bondfolding; helical structureaggregation Acknowledgements This work was supported by the US National Science Foundation (CHE-0701540) and the Office of Naval Research (N000140210519)." @default.
• W1994900975 created "2016-06-24" @default.
• W1994900975 creator A5054132976 @default.
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• W1994900975 date "2009-04-01" @default.
• W1994900975 modified "2023-09-23" @default.
• W1994900975 title "Folding and aggregation of backbone-rigidified oligo(<i>m</i>-phenylene ethynylenes) in polar and nonpolar media" @default.
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• W1994900975 doi "https://doi.org/10.1080/10610270802527002" @default.
• W1994900975 hasPublicationYear "2009" @default.
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