Reference : Monolayer Properties of Uronic Acid Bicatenary Derivatives at the Air-Water Interface: E...
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Multidisciplinary, general & others
http://hdl.handle.net/2268/94236
Monolayer Properties of Uronic Acid Bicatenary Derivatives at the Air-Water Interface: Effect of Hydroxyl Group Stereochemistry Evidenced by Experimental and Computational Approaches
English
Razafindralambo, Hary [Université de Liège - ULg > Chimie et bio-industries > Chimie biologique industrielle >]
Richel, Aurore mailto [Université de Liège - ULg > Chimie et bio-industries > Chimie biologique industrielle >]
Wathelet, Bernard mailto [Université de Liège - ULg > Chimie et bio-industries > Chimie biologique industrielle >]
Blecker, Christophe mailto [Université de Liège - ULg > Chimie et bio-industries > Technologie des industries agro-alimentaires >]
Wathelet, Jean-Paul mailto [Université de Liège - ULg > Chimie et bio-industries > Chimie générale et organique >]
Brasseur, Robert mailto [Université de Liège - ULg > Chimie et bio-industries > Centre de Bio. Fond. - Section de Biologie moléc. et numér. >]
Lins, Laurence mailto [Université de Liège - ULg > Chimie et bio-industries > Centre de Bio. Fond. - Section de Biologie moléc. et numér. >]
Miñones, Jose mailto [ > > ]
Paquot, Michel mailto [Université de Liège - ULg > Chimie et bio-industries > Chimie biologique industrielle >]
Aug-2011
Physical Chemistry Chemical Physics [=PCCP]
RSC
13
33
15291–15298
Yes (verified by ORBi)
International
1463-9076
Cambridge
UK
[en] Monolayer properties ; Uronic Acid Bicatenary Derivatives ; Surface morphology ; hydroxyl Group Stereochemistry ; Intra-H-bonding ; Air-Water interface ; Physical chemistry ; Computational approaches ; Carbohydrate-based surfactants
[en] By screening uronic acid-based surfactant interfacial properties, the effect of the hydroxyl group stereochemistry (OH-4) on the conformation of bicatenary (disubstituted) derivatives at the air–water interface has been evidenced by experimental and computational approaches. Physical and optical properties of a monolayer characterized by Langmuirfilmbalance, Brewster angle microscopy, and ellipsometry at 20°C reveal that the derivative of glucuronate (C14/14–GlcA) forms a more expanded monolayer, and shows a transition state under compression, in the opposite to that of galacturonate (C14/14–GalA). Both films are very mechanically resistant (compression modulus > 300m Nm-1) and stable (collapse pressure exceeding 60mNm-1), while that of C14/14–GalA exhibits a very high compression modulus up to 600mNm-1 like films in the solid state. Computational approaches provide single and assembly molecular models that corroborate the molecule expansion degree and interactions data from experimental results. Differences in the molecular conformation and film behaviours of uronic acid bicatenary derivatives at the air–water interface are attributed to the intra-H-bonding formation, which is more favourable with an OH-4 in the axial (C14/14–GalA) than in the equatorial position (C14/14–GlcA).
Researchers ; Professionals ; Students ; General public ; Others
http://hdl.handle.net/2268/94236
10.1039/C1CP21365B

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