New Insights into Nickel(II), Iron(II), and Cobalt(II) Bis-Complex-Based Metallo-Supramolecular Polymers
-
Chiper, Manuela; Meier, Michael; Kranenburg, Johannes M.; Schubert, Ulrich S.
- Abstract:
- One of the most important characterization methods for macromolecules is SEC. The main
difficulty for this type of measurements concerning metallo-supramolecular polymers based
on terpyridines is related to the interaction between the charged supramolecular species and
the SEC column material. In this paper, we report new studies on the characterization and the
stability of supramolecular polymers based on terpyridine metal complexes utilizing SEC. The
main aspects concerning the equilibrium between complexed and uncomplexed species are
discussed in detail. The present study reveals a strong relationship between the binding
strength of the metal ion used and the stability
of the terpyridine metal complex during the
SEC measurements, which is in agreement with
previously published results regarding the
stability of small terpyridine metal complexes
in solution. These results can lead to improved
analytic possibilities and to a better fundamental
understanding of the mentioned metallosupramolecular
polymers. Furthermore, the prepared
chain-extended supramolecular-polymer
was analyzed by depth-sensing indentation
proving an increase in elastic modulus in comparison
with the starting material.
- Year:
- 2007
- Type of Publication:
- Article
- Journal:
- Macromolecular Chemistry and Physics
- Volume:
- 208
- Pages:
- 679 - 689