Journal
CHEMISTRY-AN ASIAN JOURNAL
Volume 8, Issue 3, Pages 572-581Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/asia.201201019
Keywords
dendrimers; gels; multi-responsiveness; self-assembly
Categories
Funding
- National Natural Science Foundation of China [21102147, 91027046]
- National Basic Research Program of China
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A new class of poly(benzyl ether) dendrimers, decorated in their cores with N-Boc-protected 1,2-diphenylethylenediamine groups, were synthesized and fully characterized. It was found that the gelation capability of these dendrimers was highly dependent on dendrimer generation, and the second-generation dendrimer (R,R)-G(2)DPENBoc proved to be a highly efficient organogelator. A number of experiments (SEM, TEM, FTIR spectroscopy, H-1 NMR spectroscopy, rheological measurements, UV/Vis absorption spectroscopy, CD, and XRD) revealed that these dendritic molecules self-assembled into elastically interpenetrating one-dimensional nanostructures in organogels. The hydrogen bonding, pp, pi, and solvophobic interactions were found to be the main driving forces for formation of the gels. Most interestingly, these dendritic organogels exhibited smart multiple-stimulus-responsive behavior upon exposure to environmental stimuli such as temperature, anions, and mechanical stress.
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