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Complexation of Terpyridine-Containing Dextrans: Toward Water-Soluble Supramolecular Structures

✍ Scribed by Andreas Wild; Stephanie Hornig; Florian Schlütter; Jürgen Vitz; Christian Friebe; Martin D. Hager; Andreas Winter; Ulrich S. Schubert

Book ID
102495650
Publisher
John Wiley and Sons
Year
2010
Tongue
English
Weight
268 KB
Volume
31
Category
Article
ISSN
1022-1336

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✦ Synopsis

Abstract

Dextran was functionalized with 6‐(2,2′:6′,2″‐terpyridin‐4′‐yloxy)‐hexanoic acid using two different ratios of terpyridine to dextran, leading to terpyridine‐functionalized dextran esters possessing different degrees of substitution (DS = 0.23–0.41). The intra‐ and intermolecular complexation behavior of both functionalized biopolymers was studied using Fe^II^ metal ions as well as activated Ru^III^ complexes. The complexation behavior in the first case was studied by UV–visible and viscosity titration experiments. In the latter case, a water soluble comb‐polymer could be obtained when using a PEG‐ functionalized terpyridine Ru^II^ moiety for complexation. Moreover, nanoprecipitation was applied to self‐assemble the functionalized dextrans into nanoparticles.

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## Abstract Poly(ethylene oxide) of various molecular weights (__M__~n~ = 3 000, 5 200, 10 000, 16 500 g · mol^−1^) has been modified with terpyridine end groups as building blocks for water‐soluble metallo‐supramolecular polymers. Metallo‐supramolecular A–A homopolymers have been prepared and char