Solution Self-Assembly of Core-Labeled Block Random-Copolymers Prepared by Ring Opening Metathesis Polymerization
✍ Scribed by Martina Sandholzer; Christian Slugovc
- Publisher
- John Wiley and Sons
- Year
- 2009
- Tongue
- English
- Weight
- 375 KB
- Volume
- 210
- Category
- Article
- ISSN
- 1022-1352
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✦ Synopsis
Abstract
Herein, the synthesis of block random‐copolymers via ring opening metathesis polymerization (ROMP) is presented. A random‐copolymer of norbornene dimethyl ester with different xanthen‐functionalized norbornene derivatives was used as a hydrophobic block while, the hydrophilic part was built from an ethylene glycol‐substituted monomer. The self‐association of these block random‐copolymers in MeOH was strongly influenced by the ionization state of the dye molecules, as shown by a combination of UV–Vis absorption and dynamic light scattering measurements. Aggregate sizes were significantly smaller for samples with charged dye molecules in the core of the aggregate. These findings were attributed to ion pair formation of the charged dye molecules and the according counter ions, thus, inducing strongly attractive dipole–dipole interactions. The optical properties of the dyes under investigation, however, were preserved within the polymer aggregates.
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