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  Direct experimental observation of the aggregation of α-amino acids into 100–200 nm clusters in aqueous solution

Hagmeier, D., Ruesing, J., Fenske, T., Klein, H.-W., Schmuck, C., Schrader, W., et al. (2012). Direct experimental observation of the aggregation of α-amino acids into 100–200 nm clusters in aqueous solution. RSC Advances, 2(11), 4690-4696. doi:10.1039/C2RA01352E.

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 Urheber:
Hagmeier, Daniel1, Autor
Ruesing, Johannes1, Autor
Fenske, Tassilo2, Autor
Klein, Heinz-Werner3, Autor           
Schmuck, Carsten2, Autor
Schrader, Wolfgang3, Autor           
Minas da Piedade, Manuel E.4, Autor
Epple, Matthias1, Autor
Affiliations:
1Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen, Universitaetsstr. 5-7, 45117 Essen, Germany, ou_persistent22              
2Institute of Organic Chemistry and Center for Nanointegration Duisburg- Essen (CeNIDE), Universitaetsstr. 5-7, 45117 Essen, Germany, ou_persistent22              
3Service Department Schrader (MS), Max-Planck-Institut für Kohlenforschung, Max Planck Society, ou_1445629              
4Centro de Química Bioquímica e Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade de Lisboa, 1749-016 Lisboa, Portugal, ou_persistent22              

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 Zusammenfassung: Spherical supramolecular aggregates of α-amino acids with a typical diameter of 100–200 nm are formed spontaneously after dissolution in water at a concentration of a few mM, i.e. well below the solubility limit. Their presence was shown by nanoparticle tracking analysis (NTA), atomic force microscopy (AFM), and ESI mass spectrometry (ESI-MS). There is a dynamic equilibrium between the aggregates and dissolved individual molecules which allows them to penetrate through dialysis membranes and filters. The same phenomenon was observed for para-amino salicylic acid and two dipeptides. Thermodynamic considerations suggest an entropy-controlled process.

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Sprache(n): eng - English
 Datum: 2011-12-232012-03-142012-03-152012-06-07
 Publikationsstatus: Erschienen
 Seiten: -
 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: Expertenbegutachtung
 Identifikatoren: DOI: 10.1039/C2RA01352E
 Art des Abschluß: -

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Titel: RSC Advances
  Kurztitel : RSC Adv.
Genre der Quelle: Zeitschrift
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Ort, Verlag, Ausgabe: Cambridge, UK : Royal Society of Chemistry
Seiten: - Band / Heft: 2 (11) Artikelnummer: - Start- / Endseite: 4690 - 4696 Identifikator: ISSN: 2046-2069
CoNE: https://pure.mpg.de/cone/journals/resource/2046-2069