de.mpg.escidoc.pubman.appbase.FacesBean
English
 
Help Guide Disclaimer Contact us Login
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT

Released

Journal Article

Fluorescent star-shaped polystyrenes: "Core-first" synthesis from perylene-based ATRP initiators and dynamic mechanical solid-state properties

MPS-Authors
http://pubman.mpdl.mpg.de/cone/persons/resource/persons48195

Klok,  Harm-Anton
MPI for Polymer Research, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons48728

Schuch,  F.
MPI for Polymer Research, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons48541

Pakula,  Tadeusz
MPI for Polymer Research, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons48459

Müllen,  Klaus
MPI for Polymer Research, Max Planck Society;

Locator
There are no locators available
Fulltext (public)
There are no public fulltexts available
Supplementary Material (public)
There is no public supplementary material available
Citation

Klok, H.-A., Becker, S., Schuch, F., Pakula, T., & Müllen, K. (2002). Fluorescent star-shaped polystyrenes: "Core-first" synthesis from perylene-based ATRP initiators and dynamic mechanical solid-state properties. Macromolecular Chemistry and Physics, 203(8), 1106-1113.


Cite as: http://hdl.handle.net/11858/00-001M-0000-000F-65C8-D
Abstract
Full Paper: This paper describes the synthesis of two grovel tetra, 2-bromoisobutyric acid-substituted perylene fluorophores and their use as initiators for the atom transfer radical polymerization of styrene. Different star-shaped polystyrenes covering a wide range of molecular weights were prepared by variations in the initial molar ratio between styrene and the perylene chromophores. Bulk properties of the star polymers were investigated by X-ray scattering, differential scanning calorimetry, and dynamic mechanical measurements. These studies revealed that the polystyrene arms effectively suppress the aggregation of the perylene chromophores and indicated that, especially at low degrees of polymerization, the rigid-core moiety significantly affects the segmental dynamics of the arms. Spin-casting of the polystyrene stars afforded optically transparent films, which displayed high fluorescent quantum yields. Due to the covalent linkage between the polystyrene chains and the perylene chromophore, the dye-contents of such films can be much higher than those achievable by dissolution of the corresponding low-molar-mass perylene dye in a polystyrene matrix. In addition, the polystyrene arms are likely to reduce the mobility of the chromophore within a polystyrene matrix. These features make these fluorescent star- shaped polymers of interest to improve the migration fastness of colored polystyrene samples.