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  Rotational diffusion measurements of suspended colloidal particles using two-dimensional exchange nuclear magnetic resonance

Barrall, G. A., Schmidt-Rohr, K., Lee, Y. K., Landfester, K., Zimmermann, H., Chingas, G. C., et al. (1996). Rotational diffusion measurements of suspended colloidal particles using two-dimensional exchange nuclear magnetic resonance. The Journal of Chemical Physics, 104(2), 509-520. doi:10.1063/1.470847.

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Alternativer Titel : Rotational diffusion measurements of suspended colloidal particles using two-dimensional exchange nuclear magnetic resonance

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JChemPhys_104_1996_509.pdf (beliebiger Volltext), 390KB
 
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 Urheber:
Barrall, G. A., Autor
Schmidt-Rohr, K., Autor
Lee, Y. K., Autor
Landfester, K., Autor
Zimmermann, Herbert1, 2, Autor           
Chingas, G. C., Autor
Pines, A., Autor
Affiliations:
1Department of Molecular Physics, Max Planck Institute for Medical Research, Max Planck Society, ou_1497705              
2Department of Biomolecular Mechanisms, Max Planck Institute for Medical Research, Max Planck Society, ou_1497700              

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 Zusammenfassung: We present here an experimental and theoretical study of the application of two-dimensional exchange nuclear magnetic resonance spectroscopy ~NMR! to the investigation of the rotational diffusion of colloidal particles. The theoretical discussion includes the nature of the NMR frequency time-correlation function where the NMR interaction is represented by the chemical shift anisotropy ~CSA!. Time-correlation functions for the isotropic rotational diffusion of a suspension of colloidal particles containing single and multiple sites are derived in addition to time-correlation functions for the rotational diffusion of a suspension of symmetric top particles containing an isotropic distribution of a single CSA interaction. Simulations of two-dimensional exchange spectra for particles undergoing isotropic rotational diffusion are presented. We performed two-dimensional exchange NMR experiments on a colloidal suspension of spherical poly~methyl methacrylate! ~PMMA! particles which were synthesized with a 20% enrichment in 13C at the carbonyl site. Rotational diffusion time-correlation functions determined from the experimental exchange spectra are consistent with the composition of the colloidal suspension. Detailed explanations of the syntheses of the enriched methyl 13C-~carbonyl!-methacrylate monomer and the small quantities of 20% enriched 13C-~carbonyl!-poly~methyl methacrylate! microspheres used for this study are presented.

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Sprache(n): eng - English
 Datum: 1995-07-051995-09-251996
 Publikationsstatus: Erschienen
 Seiten: -
 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: Expertenbegutachtung
 Identifikatoren: eDoc: 666035
DOI: 10.1063/1.470847
Anderer: 5470
 Art des Abschluß: -

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Titel: The Journal of Chemical Physics
  Andere : J. Chem. Phys.
Genre der Quelle: Zeitschrift
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Ort, Verlag, Ausgabe: Woodbury, N.Y. : American Institute of Physics
Seiten: - Band / Heft: 104 (2) Artikelnummer: - Start- / Endseite: 509 - 520 Identifikator: ISSN: 0021-9606
CoNE: https://pure.mpg.de/cone/journals/resource/954922836226