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231224s2011 xx |||||o 00| ||eng c |
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|a 10.1021/la2022819
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|a eng
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1 |
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|a Hou, Xiaoyu
|e verfasserin
|4 aut
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|a Novel dimeric cholesteryl derivatives and their smart thixotropic gels
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|c 2011
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|a Text
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|a ƒaComputermedien
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|a Date Completed 26.01.2012
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|a Date Revised 28.09.2011
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a © 2011 American Chemical Society
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|a Three novel LS(2)-type dimeric-cholesteryl derivatives (1-3), where S is a steroidal residue and L stands for a linker connecting the two S residues and contains three benzene rings and two amide and two carbamate groups, were designed and prepared. The compounds can gel a wide variety of organic solvents via three different ways, including mixing at room temperature, a heating-cooling cycle, and ultrasound treatment. SEM measurements revealed that the structures and the concentrations of the gelators, the nature of the solvent, and the preparation method employed have a great effect on the morphologies of the gel networks. It was revealed that 1 is a supergelator for DMSO (cgc = 0.04% w/v) and that the 1/DMSO gel can be prepared via any of the three methods mentioned above. Furthermore, the gel possesses excellent mechanical strength and a very smart thixotropic property. FT-IR and temperature- and concentration-dependent (1)H NMR spectroscopy studies revealed that hydrogen bonding and π-π stacking among the molecules of 1 are two important driving forces for the physical gelation of DMSO. In addition, XRD analysis confirmed the layered packing structure of 1 in its DMSO gel
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|a Journal Article
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1 |
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|a Gao, Di
|e verfasserin
|4 aut
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|a Yan, Junlin
|e verfasserin
|4 aut
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|a Ma, Ying
|e verfasserin
|4 aut
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|a Liu, Kaiqiang
|e verfasserin
|4 aut
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|a Fang, Yu
|e verfasserin
|4 aut
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|i Enthalten in
|t Langmuir : the ACS journal of surfaces and colloids
|d 1992
|g 27(2011), 19 vom: 04. Okt., Seite 12156-63
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|x 1520-5827
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|g volume:27
|g year:2011
|g number:19
|g day:04
|g month:10
|g pages:12156-63
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|u http://dx.doi.org/10.1021/la2022819
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