A novel photoresponsive azobenzene-containing miktoarm star polymer: Self-assembly and photoresponse properties

Blasco, E., Schmidt, B. V. K. J., Barner-Kowollik, C., Piñol, M., & Oriol, L. (2014) A novel photoresponsive azobenzene-containing miktoarm star polymer: Self-assembly and photoresponse properties. Macromolecules, 47(11).

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Abstract

We report the synthesis and characterization of a novel azobenzene-containing miktoarm star polymer AB3 (Mn=9700 gmol-1, M = 1.10) as well as its self-assembly properties in water. The miktoarm copolymer is composed of a hydrophobic azopolymer and three hydrophilic PEG arms (Mn = 600 g mol-1). The hydrophobic/hydrophilic ratio of the amphiphilic miktoarm polymer is 78/22, leading to the formation of stable polymeric vesicles in water evidenced via TEM and cryo-TEM imaging. The photoresponse of these vesicles has been investigated by irradiation with UV light (= 350-400 nm) causing the disruption of the self-assemblies. Encapsulation of both hydrophilic and hydrophobic fluorescent probes, i.e., Nile Red and Rhodamine B, and the use of light as an external stimulus to trigger the release of the probes have also been demonstrated. © 2014 American Chemical Society.

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ID Code: 99378
Item Type: Journal Article
Refereed: Yes
Additional Information: Cited By :22
Export Date: 5 September 2016
CODEN: MAMOB
Correspondence Address: Barner-Kowollik, C.; Preparative Macromolecular Chemistry, Institut für Technische Chemie und Polymerchemie, Karlsruhe Institute of Technology (KIT), Engesserstr. 18, 76131 Karlsruhe, Germany; email: christopher.barner-kowollik@kit.edu
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Keywords: Azobenzene, Hydrophilicity, Hydrophobicity, Polyethylene glycols, Polyethylene oxides, Polymers, External stimulus, Fluorescent probes, Hydrophilic and hydrophobic, Hydrophobic/hydrophilic, Miktoarm star polymers, Photo-responsive, Polymeric vesicles, Synthesis and characterizations, Self assembly
DOI: 10.1021/ma500254p
ISSN: 00249297
Divisions: Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > Institutes > Institute for Future Environments
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Deposited On: 22 Sep 2016 04:50
Last Modified: 27 Sep 2016 02:23

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