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Organogelators from Self-Assembling Peptide based Dendrimers: Structural and Morphological Features.

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Title Organogelators from Self-Assembling Peptide based Dendrimers: Structural and Morphological Features.
 
Creator Palui, Goutam
Simon, Franc¸ois-Xavier
Schmutz, Marc
Mesini, Philippe J
Banerjee, Arindam
 
Subject Chemistry
 
Description Two peptide based dendrimers containing L-aspartic acid as the branching unit and succinic acid/terephthalic acid as the core unit were synthesized,
characterized, and studied. These dendritic peptides form gels in various organic solvents including n-hexanol, benzene, toluene, chlorobenzene,
1,2-dichlorobenzene, o-xylene, tetralin, and nitrobenzene. Gels were characterized by freeze fracture transmission electron
microscopic (FF-TEM), field emission scanning electron microscopic (SEM), transmission electron microscopic (TEM), wide angle X-ray powder
diffraction (WAXPD), and variable temperature FTIR (VT-FTIR) studies. The VT-FTIR study indicates that amides and ester groups are
involved in intermolecular hydrogen bonding in the gel state. Two transitions have been observed for both the dendrimer gels upon heating:
the first one corresponds to the gel to sol transition and corresponds to the breaking of hydrogen bonds between esters and amides; the second
one corresponds to the breaking of hydrogen bonds between amides. In the case of dendrimer 1 structural reorganization occurs in the sol state
after the first transition, which is absent in the dendrimer 2 in the sol state. FF-TEM observations showed that both dendritic peptides form
a platelet structure in gel state. SEM images of these dried gels indicate different geometry in different solvents in their self-assembled gel state.
 
Publisher Elsevier
 
Date 2008
 
Type Article
PeerReviewed
 
Format application/pdf
 
Identifier http://www.eprints.iicb.res.in/976/1/TETRAHEDRON__64(1_)__175%2D185;2008[141].pdf
Palui, Goutam and Simon, Franc¸ois-Xavier and Schmutz, Marc and Mesini, Philippe J and Banerjee, Arindam (2008) Organogelators from Self-Assembling Peptide based Dendrimers: Structural and Morphological Features. Tetrahedron, 64 (1). pp. 175-185.
 
Relation http://dx.doi.org/10.1016/j.tet.2007.10.061
http://www.eprints.iicb.res.in/976/