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Europium(III)-cored fluorinated dendrimers at the air-water surface
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2007 (English)In: Colloids and Surfaces A: Physicochemical and Engineering Aspects, ISSN 0927-7757, E-ISSN 1873-4359, Vol. 299, no 03-jan, 186-197 p.Article in journal (Refereed) Published
Abstract [en]

A series of lanthanide (Eu3+) cored fluorinated dendrimers of generations I through 4 (G1-G4) have been studied with respect to their film-forming properties at the air-water surface. All dendrimers studied here formed stable films at the air-water surface. At the air-water surface, the dendrimers are likely to adopt asymmetric funnel-like conformations wherein the lanthanide core is directed towards the water surface and the fluorinated phenyl groups are directed away from the bulk phase. This hypothesis was further tested by addition of an electrolyte (0.01 M MgSO4) to the subphase. The added electrolyte was found to (i) advance the onset of network formation, as well as completion of monolayers, and (ii) increase the collapse pressure. Both features support the asymmetric conformation hypothesis, in that addition of an electrolyte promotes further conformational changes and shields electrostatic repulsion between lanthanide cores, thus allowing for closer packing of the molecules.

Place, publisher, year, edition, pages
2007. Vol. 299, no 03-jan, 186-197 p.
Keyword [en]
dendrimer, lanthanide cation, Langmuir films, monolayer, compressibility, wave-guide applications, dendritic macromolecules, molecular architecture, physical-properties, convergent approach, emission-spectra, polymers, complexes, behavior, polyesters
Identifiers
URN: urn:nbn:se:kth:diva-16573DOI: 10.1016/j.colsurfa.2006.11.037ISI: 000245879300025Scopus ID: 2-s2.0-33947312835OAI: oai:DiVA.org:kth-16573DiVA: diva2:334615
Note
QC 20100525Available from: 2010-08-05 Created: 2010-08-05 Last updated: 2017-12-12Bibliographically approved

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Hult, Anders

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