Issue 2, 2019
From the journal:

Nanoscale

Supramolecular polymerization: challenges and advantages of various methods in assessing the aggregation mechanism†

Roman Vill, ORCID logo a   Jochen Gülcher,a   Pavel Khalatur,bc   Pascal Wintergerst,a   Andreas Stoll,a   Ahmed Mourrand  and  Ulrich Ziener ORCID logo *a  

* Corresponding authors

a Institute of Organic Chemistry III-Macromolecular Chemistry and Organic Materials, University of Ulm, Albert-Einstein-Allee 11, 89081 Ulm, Germany
E-mail: ulrich.ziener@uni-ulm.de

b Institute of Organoelement Compounds, Russian Academy of Science, Moscow 119991, Russia

c Ulm University, Polymer Science, Albert-Einstein-Allee 47, 89081 Ulm, Germany

d DWI-Leibniz Institute for Interactive Materials, Forckenbeckstrasse 50, D-52056 Aachen, Germany

Abstract

Oligothiophenes with branched alkyl end groups show distinct aggregation in organic solvents. The process of supramolecular polymerization is assessed by three different methods (UV-vis absorption and fluorescence emission spectroscopy and dynamic light scattering) to exclude artifacts. An apparent dependence of the degree of aggregation on the concentration of the oligomers is observed. Above the upper limit of concentration (a lower micromolar range for the present class of compounds), experimental data delivered conflicting results and the concentration should not therefore be exceeded. Scanning force microscopy and molecular dynamics simulations confirm the formation of one-dimensional aggregates with presumably helical arrangement of the achiral monomers.

Graphical abstract: Supramolecular polymerization: challenges and advantages of various methods in assessing the aggregation mechanism

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Article information

DOI
https://doi.org/10.1039/C8NR08472F
Article type
Paper
Submitted
19 Oct 2018
Accepted
30 Nov 2018
First published
03 Dec 2018

Nanoscale, 2019,11, 663-674

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Supramolecular polymerization: challenges and advantages of various methods in assessing the aggregation mechanism

R. Vill, J. Gülcher, P. Khalatur, P. Wintergerst, A. Stoll, A. Mourran and U. Ziener, Nanoscale, 2019, 11, 663 DOI: 10.1039/C8NR08472F

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