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Iridium-Functionalized Polyfluorenes: Advantages and Limitations of the Suzuki and Yamamoto Approaches

Langecker, Jens and Rehahn, Matthias (2008):
Iridium-Functionalized Polyfluorenes: Advantages and Limitations of the Suzuki and Yamamoto Approaches.
209, In: Macromolecular Chemistry and Physics, (3), pp. 258-271, ISSN 10221352, [Online-Edition: http://dx.doi.org/10.1002/macp.200700299],
[Article]

Abstract

Four synthetic pathways leading toward iridium-functionalized polyfluorenes are compared: the metallopolymers have been synthesized via Suzuki and Yamamoto polycondensation reactions, and precursor routes as well as direct routes have been tested for both coupling protocols. The direct Yamamoto synthesis – using an appropriately functionalized iridium-complex as comonomer – is shown to be the most efficient method. The three competing routes produce the desired polymers too, but the materials are either lower in molar mass or less regular in molecular constitution. Exploratory analysis of the optical properties shows that the polyfluorene moieties dominate absorption and photoluminescence behavior in dilute solution, while luminescence originates mainly from the iridium complexes when solid-state samples are investigated.

Item Type: Article
Erschienen: 2008
Creators: Langecker, Jens and Rehahn, Matthias
Title: Iridium-Functionalized Polyfluorenes: Advantages and Limitations of the Suzuki and Yamamoto Approaches
Language: English
Abstract:

Four synthetic pathways leading toward iridium-functionalized polyfluorenes are compared: the metallopolymers have been synthesized via Suzuki and Yamamoto polycondensation reactions, and precursor routes as well as direct routes have been tested for both coupling protocols. The direct Yamamoto synthesis – using an appropriately functionalized iridium-complex as comonomer – is shown to be the most efficient method. The three competing routes produce the desired polymers too, but the materials are either lower in molar mass or less regular in molecular constitution. Exploratory analysis of the optical properties shows that the polyfluorene moieties dominate absorption and photoluminescence behavior in dilute solution, while luminescence originates mainly from the iridium complexes when solid-state samples are investigated.

Journal or Publication Title: Macromolecular Chemistry and Physics
Volume: 209
Number: 3
Uncontrolled Keywords: conjugated polymers; iridium complexes; iridium-containing polymers; light-emitting diodes; metal–polymer complexes; polyfluorenes; Suzuki coupling; triplet emitters; Yamamoto coupling
Divisions: DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 595: Electrical fatigue > A - Synthesis > Subproject A5: Synthesis of semiconducting model polymers and their characterization before and after cyclic electrical fatigue
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 595: Electrical fatigue > A - Synthesis
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 595: Electrical fatigue
Zentrale Einrichtungen
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres
DFG-Collaborative Research Centres (incl. Transregio)
Date Deposited: 04 Aug 2011 14:52
Official URL: http://dx.doi.org/10.1002/macp.200700299
Additional Information:

SFB 595 A5

Identification Number: doi:10.1002/macp.200700299
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