Glycine and l-glutamic acid-based dendritic gelators
Novel dendrons based on glycine and l-glutamic acid from the first generation ( G1) to the third generation ( G3) were synthesized and studied for their gelation properties by using transmission electron microscopy (TEM), atomic force microscopy (AFM), fluorescence, IR, circular dichroism (CD), and...
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Published in | Tetrahedron Vol. 63; no. 36; pp. 8794 - 8800 |
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Main Authors | , , , , |
Format | Journal Article |
Language | English |
Published |
OXFORD
Elsevier Ltd
03.09.2007
Elsevier |
Subjects | |
Online Access | Get full text |
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Summary: | Novel dendrons based on glycine and
l-glutamic acid from the first generation (
G1) to the third generation (
G3) were synthesized and studied for their gelation properties by using transmission electron microscopy (TEM), atomic force microscopy (AFM), fluorescence, IR, circular dichroism (CD), and
1H NMR spectroscopy. It was found that the gelation capability of these dendrons increased from the first generation (
G1) to the third generation (
G3), and that
G3 exhibited the highest efficiency in forming gels. Both the focal and peripheral groups of dendrons had great effects on the formation of organogels. Hydrogen bonding and π–π stacking interactions were proved to be the main driving forces to form the fibrous networks at low concentrations (0.5
wt
%). Small-angle X-ray scattering (SAXS) and wide-angle X-ray diffraction (WAXD) measurements indicate that the xerogels of the second generation (
G2) from ethyl acetate and ethanol, and
G3 xerogel from CH
2Cl
2 all display lamellar structures with the interlamellar spacing of ca. 36.0
Å for
G2 and 40.5
Å for
G3, respectively.
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ISSN: | 0040-4020 1464-5416 |
DOI: | 10.1016/j.tet.2007.06.028 |