Synthesis of Functional Block Copolymers Carrying One Poly( p -phenylenevinylene) and One Nonconjugated Block in a Facile One-Pot Procedure

Abstract
Block copolymers composed of a MEH-PPV block and a nonconjugated functional block (molecular weights between 5 and 90 kg/mol) were synthesized in a facile one-pot procedure via ROMP. This one-pot procedure permits the synthesis of numerous block copolymers with little effort. Amphiphilic block copolymers were obtained via incorporation of oxanorbornene carrying a PEG side chain as well as via postpolymerization modification of a reactive ester carrying norbornene derivative with methoxypoly(ethylene glycol)amine. These amphiphilic block copolymers can be self-assembled into micelles exhibiting different sizes (60-95 nm), morphologies (micelles or fused, caterpillar-like micelles), and optical properties depending on the polymer composition and the micellization procedure. Furthermore, the reactive ester carrying block copolymers enabled the introduction of anchor groups which facilitated the preparation of nanocomposites with CdSe/CdZnS core-shell QDs. The obtained composites were studied using time-resolved photoluminescence measurements. The results revealed an increased interaction based on an accelerated decay of the QD emission for composites as compared to the mixture of the QDs with unfunctionalized polymers. © 2016 American Chemical Society.

Citation
Menk F, Shin S, Kim K-O, Scherer M, Gehrig D, et al. (2016) Synthesis of Functional Block Copolymers Carrying One Poly( p -phenylenevinylene) and One Nonconjugated Block in a Facile One-Pot Procedure . Macromolecules 49: 2085–2095. Available: http://dx.doi.org/10.1021/acs.macromol.5b02529.

Acknowledgements
The authors gratefully thank the Deutsche Forschungsgemeinschaft (DFG): International Research Training Group (IRTG) 1404 "Self-Organized Materials for Optoelectronics" as well as the Basic Science Research and Nano-Material Technology Development through NRF of Korea for funding. In addition, the authors thank the group of Prof. Kookheon Char from Seoul National University for providing the CdSe/CdZnS core-shell QDs.

Publisher
American Chemical Society (ACS)

Journal
Macromolecules

DOI
10.1021/acs.macromol.5b02529

Additional Links
http://pubs.acs.org/doi/abs/10.1021/acs.macromol.5b02529

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