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231224s2012 xx |||||o 00| ||eng c |
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|a 10.1021/la2045948
|2 doi
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|a pubmed24n0724.xml
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|a eng
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|a Jacquemet, Alicia
|e verfasserin
|4 aut
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|a Stereochemical effect revealed in self-assemblies based on archaeal lipid analogues bearing a central five-membered carbocycle
|b a SAXS study
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|c 2012
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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 28.09.2012
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|a Date Revised 19.07.2012
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|a published: Print-Electronic
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|a Citation Status MEDLINE
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|a The relative stereochemistry (cis or trans) of a 1,3-disubstituted cyclopentane unit in the middle of tetraether archaeal bipolar lipid analogues was found to have a dramatic influence on their supramolecular self-assembly properties. SAXS studies of two synthetic diastereomeric archaeal lipids bearing two lactosyl polar head groups at opposite ends revealed different lyotropic behaviors. The cis isomer led to L(c)-L(α)-Q(II) transitions whereas the trans isomer retained an L(α) phase from 20 to 100 °C. These main differences originate from the conformational equilibrium (pseudorotation) of 1,3-disubstituted cyclopentanes. Indeed, this pseudorotation exhibits quite similar orientations of the two substituents in a trans isomer whereas several orientations of the two alkyl chains are expected in a cis-1,3-dialkyl cyclopentane, thus authorizing more conformational flexibility in the lipid packing
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|a Journal Article
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|a Research Support, Non-U.S. Gov't
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|a Cyclopentanes
|2 NLM
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|a Lipids
|2 NLM
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|a Mériadec, Cristelle
|e verfasserin
|4 aut
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|a Lemiègre, Loïc
|e verfasserin
|4 aut
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|a Artzner, Franck
|e verfasserin
|4 aut
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|a Benvegnu, Thierry
|e verfasserin
|4 aut
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|i Enthalten in
|t Langmuir : the ACS journal of surfaces and colloids
|d 1992
|g 28(2012), 20 vom: 22. Mai, Seite 7591-7
|w (DE-627)NLM098181009
|x 1520-5827
|7 nnns
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| 773 |
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|g volume:28
|g year:2012
|g number:20
|g day:22
|g month:05
|g pages:7591-7
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|u http://dx.doi.org/10.1021/la2045948
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