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231224s2011 xx |||||o 00| ||eng c |
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|a 10.1021/la202162q
|2 doi
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|a pubmed25n0704.xml
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|e rakwb
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|a eng
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1 |
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|a Perino, Aurélia
|e verfasserin
|4 aut
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| 245 |
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|a Self-assembled nanotubes and helical tapes from diacetylene nonionic amphiphiles. Structural studies before and after polymerization
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|c 2011
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
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|2 rdamedia
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|a ƒa Online-Ressource
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|a Date Completed 26.01.2012
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|a Date Revised 21.11.2013
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|a published: Print-Electronic
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|a Citation Status MEDLINE
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|a © 2011 American Chemical Society
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|a We synthesized new amphiphiles comprised of a single diacetylenic chain and an oligoethylenoxide polar chain linked by an amide bond. In aqueous medium, they are not soluble at room temperature but form weak gels. Electron microscopy studies have shown that they self-assemble into helical tapes or nanotubes with lengths of several micrometers, and inner and outer diameters of 50 ± 1 and 59 ± 1 nm, respectively. The wall has a thickness of 10 ± 1 nm for both kinds of objects and has an amphiphile bilayer structure. The hydrophobic chains are ordered, and the amide groups are linked with each other by H-bonds. The dissociation of the tubes is a first-order transition with an enthalpy of ca. 40 kJ mol(-1). The nanotubes were photopolymerized to yield purple solutions consisting of helical tapes and almost flat ribbons. The polymers exhibit irreversible thermochromism upon heating
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|a Journal Article
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|a Research Support, Non-U.S. Gov't
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|a Amides
|2 NLM
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|a Ethylene Oxide
|2 NLM
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|a JJH7GNN18P
|2 NLM
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|a Acetylene
|2 NLM
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|a OC7TV75O83
|2 NLM
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|a Schmutz, Marc
|e verfasserin
|4 aut
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|a Meunier, Stéphane
|e verfasserin
|4 aut
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|a Mésini, Philippe J
|e verfasserin
|4 aut
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|a Wagner, Alain
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Langmuir : the ACS journal of surfaces and colloids
|d 1985
|g 27(2011), 19 vom: 04. Okt., Seite 12149-55
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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:12149-55
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|u http://dx.doi.org/10.1021/la202162q
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