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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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Item Permalink: https://hdl.handle.net/11858/00-001M-0000-0024-337A-9 Version Permalink: https://hdl.handle.net/11858/00-001M-0000-0024-337B-7
Genre: Journal Article
Alternative Title : Rotational diffusion measurements of suspended colloidal particles using two-dimensional exchange nuclear magnetic resonance

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JChemPhys_104_1996_509.pdf (Any fulltext), 390KB
 
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 Creators:
Barrall, G. A., Author
Schmidt-Rohr, K., Author
Lee, Y. K., Author
Landfester, K., Author
Zimmermann, Herbert1, 2, Author           
Chingas, G. C., Author
Pines, A., Author
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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 Abstract: 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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Language(s): eng - English
 Dates: 1995-07-051995-09-251996
 Publication Status: Issued
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: eDoc: 666035
DOI: 10.1063/1.470847
Other: 5470
 Degree: -

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Title: The Journal of Chemical Physics
  Other : J. Chem. Phys.
Source Genre: Journal
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Publ. Info: Woodbury, N.Y. : American Institute of Physics
Pages: - Volume / Issue: 104 (2) Sequence Number: - Start / End Page: 509 - 520 Identifier: ISSN: 0021-9606
CoNE: https://pure.mpg.de/cone/journals/resource/954922836226