- Self-assembled organogels based on two-component system
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Organogels were produced by the self-assembly of two organogelators, 3,5-bis(dodecanoylamino)benzoic acid and aromatic amines, in nonaromatic hydrocarbon solvents, through hydrogen bonding, aromatic stacking, and van der Waals interactions. 3,5-Bis(dodecanoylamino)benzoic acid has one carboxylic acid group for hydrogen bonding with amines and two alkylamide groups that can participate in interlayer hydrogen bonding and van der Waals interactions. The shape and size of the aromatic amines have a significant effect on the gel properties as well as their structures. A variety of organogels were realized by forming complexes of 3,5-bis(dodecanoylamino)benzoic acid and various amines with an aromatic group in nonaromatic hydrocarbon solvents.
- Nam, Seong Ryong,Lee, Ho Yong,Hong, Jong-In
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- Self-association of branched and dendritic aromatic amides
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Several branched and dendritic aromatic amides have been obtained by reacting tris(4-aminophenyl)-methane 3 either with aryl iodide 1 in a Pd-catalysed carbonylation or with carboxylic acids in the presence of the coupling agent triphenyl phosphite. Nonpolar aromatic substituents and solubilising groups at the periphery ensured that the resulting oligoamides were soluble in chloroform, whereas amide groups in the structural centre of the molecules accounted for strong self-association through hydrogen bonding in solution as evidenced by 1H NMR and vapour-pressure osmometry data. An alternative approach towards branched aramides is also presented which was based on the self-assembly of 1,3,5-tris(4,5-dihydroimidazol-2-yl)benzene 12 and various (amido)carboxylic acids.
- Kraft, Arno,Osterod, Frank
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p. 1019 - 1025
(2007/10/03)
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