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Local NMR Relaxation of Dendrimers in the Presence of Hydrodynamic Interactions |
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| Authors: | Maxim?Dolgushev mailto:dolgushev@physik.uni-freiburg.de" title=" dolgushev@physik.uni-freiburg.de" itemprop=" email" data-track=" click" data-track-action=" Email author" data-track-label=" " >Email author http://orcid.org/---" itemprop=" url" title=" View OrcID profile" target=" _blank" rel=" noopener" data-track=" click" data-track-action=" OrcID" data-track-label=" " >View author&# s OrcID profile,Sebastian?Schnell,Denis?A.?Markelov |
| Affiliation: | 1.Institute of Physics,University of Freiburg,Freiburg,Germany;2.Institut Charles Sadron,Université de Strasbourg and CNRS,Strasbourg Cedex,France;3.St. Petersburg State University,St. Petersburg,Russia;4.St. Petersburg National Research University of Information Technologies Mechanics and Optics (ITMO University),St. Petersburg,Russia |
| Abstract: | We study the role of hydrodynamic interactions for the relaxation of segments’ orientations in dendrimers. The dynamics is considered in the Zimm framework. It is shown that inclusion of correlations between segments’ orientations plays a major role for the segments’ mobility, which reveals itself in the nuclear magnetic resonance relaxation functions. The enhancement of the reorientation dynamics of segments due to the hydrodynamic interactions is more significant for the inner segments. This effect is clearly pronounced in the reduced spectral density (omega J(omega )), maximum of which shifts to higher frequencies when the hydrodynamic interactions are taken into account. |
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