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Low molecular weight organogelators from self-assembling synthetic tripeptides with coded amino acids: morphological, structural, thermodynamic and spectroscopic investigations

Das, A.K., Manna, S., Drew, M.G.B., Malik, S., Nandi, A.K. and Banerjee, A. (2006) Low molecular weight organogelators from self-assembling synthetic tripeptides with coded amino acids: morphological, structural, thermodynamic and spectroscopic investigations. Supramolecular Chemistry, 18 (8). pp. 645-655. ISSN 1061-0278

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To link to this item DOI: 10.1080/10610270601035553

Abstract/Summary

A series of self-assembling terminally blocked tripeptides (containing coded amino acids) form gels in various aromatic solvents including benzene, toluene, xylenes at low concentrations. However these tripeptides do not form gels in aliphatic hydrocarbons like n-hexane, cyclohexane, n-decane etc. Morphological studies of the dried gel indicate the presence of an entangled fibrous network, which is responsible for gelation. Differential scanning calorimetric (DSC) studies of the gels produced by peptide 1 clearly demonstrates thermoreversible nature of the gel and tripeptide-solvent complex may be produced during gel formation. FT-IR and H-1 NMR studies of the gels demonstrate that an intermolecular hydrogen-bonding network is formed during gelation. Single crystal X-ray diffraction studies for peptides 1, 2 and 3 have been performed to investigate the molecular arrangement that might be responsible for forming the fibrous network of these self-assembling peptide gelators. It has been found that the morph responsible for gelation of peptides 1, 2 and 3 in benzene is somewhat different from that of its xerogel.

Item Type:Article
Refereed:Yes
Divisions:Faculty of Life Sciences > School of Chemistry, Food and Pharmacy > Department of Chemistry
ID Code:11176
Uncontrolled Keywords:gel, self-assembly, peptide, fibrillar network, AMYLOID-LIKE FIBRILS, SUPRAMOLECULAR BETA-SHEETS, MASS ORGANIC GELATOR, SOLID-STATE, ROOM-TEMPERATURE, PEPTIDOMIMETIC CYCLOPHANES, POLY(VINYLIDENE FLUORIDE), THERMOREVERSIBLE GELATION, OIL/WATER, MIXTURES, GOLD NANOPARTICLES

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