4.7 Article

NMR relaxation of the orientation of single segments in semiflexible dendrimers

Journal

JOURNAL OF CHEMICAL PHYSICS
Volume 140, Issue 24, Pages -

Publisher

AMER INST PHYSICS
DOI: 10.1063/1.4884024

Keywords

-

Funding

  1. European Community through DAAD [PIRSES-GA-2011-295302]
  2. St. Petersburg State University of the Deutsche Forschungsgemeinschaft [Bl 142/11-1]
  3. Fonds der Chemischen Industrie

Ask authors/readers for more resources

We study the orientational properties of labeled segments in semiflexible dendrimers making use of the viscoelastic approach of Dolgushev and Blumen [J. Chem. Phys. 131, 044905 (2009)]. We focus on the segmental orientational autocorrelation functions (ACFs), which are fundamental for the frequency-dependent spin-lattice relaxation times T-1(omega). We show that semiflexibility leads to an increase of the contribution of large-scale motions to the ACF. This fact influences the position of the maxima of the [1/T-1]-functions. Thus, going from outer to inner segments, the maxima shift to lower frequencies. Remarkably, this feature is not obtained in the classical bead-spring model of flexible dendrimers, although many experiments on dendrimers manifest such a behavior. (C) 2014 AIP Publishing LLC.

Authors

I am an author on this paper
Click your name to claim this paper and add it to your profile.

Reviews

Primary Rating

4.7
Not enough ratings

Secondary Ratings

Novelty
-
Significance
-
Scientific rigor
-
Rate this paper

Recommended

No Data Available
No Data Available