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Versatile Approach to Well-Defined Oligofluorenes and Polyfluorenes with Low Dispersity

Title data

Wollmann, Julia ; Kahle, Frank-Julian ; Bauer, Irene ; Köhler, Anna ; Strohriegl, Peter:
Versatile Approach to Well-Defined Oligofluorenes and Polyfluorenes with Low Dispersity.
In: Macromolecules. Vol. 53 (2020) Issue 22 . - pp. 10137-10146.
ISSN 0024-9297
DOI: https://doi.org/10.1021/acs.macromol.0c01887

Abstract in another language

In this work, we present a versatile approach to achieve well-defined conjugated polymers and oligomers from a single standard synthesis route via preparative size-exclusion chromatography. Using a special recycle mode and well-defined endcappers, we are able to prepare pure oligomers with three to eight repeat units and high-molecular-weight polymers with dispersity ĐM as low as 1.06 in just one preparation step with reasonable yield. To demonstrate the capabilities of our method, we conducted a fundamental spectroscopic study on the influence of chain length and molecular weight distribution on electronic properties and aggregation behavior of a series of fluorene based oligo- and polymers. Due to the well-defined nature of the investigated compounds, we consistently find a first-order phase transition and an increase of the critical transition temperature from the amorphous phase to the ordered β-phase as a function of the number of repeat units in accordance with the Sanchez model on coil–globule transitions.

Further data

Item Type: Article in a journal
Refereed: Yes
Institutions of the University: Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics
Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Chair Experimental Physics II - Optoelectronics of Soft Matter
Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Chair Experimental Physics II - Optoelectronics of Soft Matter > Chair Experimental Physics II - Optoelectronics of Soft Matter - Univ.-Prof. Dr. Anna Köhler
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Macromolecular Chemistry I > Chair Macromolecular Chemistry I - Univ.-Prof. Dr. Hans-Werner Schmidt
Result of work at the UBT: Yes
DDC Subjects: 500 Science > 530 Physics
Date Deposited: 27 Nov 2020 07:26
Last Modified: 27 Nov 2020 07:26
URI: https://eref.uni-bayreuth.de/id/eprint/60457