Wing C. Tsoi
Observation of the β-phase in two short-chain oligofluorenes
Tsoi, Wing C.; Charas, Ana; Cadby, Ashley J.; Khalil, Gamal; Adawi, Ali M.; Iraqi, Ahmed; Hunt, Barry; Morgado, Jorge; Lidzey, David G.
Authors
Ana Charas
Ashley J. Cadby
Gamal Khalil
Dr Ali Adawi A.Adawi@hull.ac.uk
Reader in Physics
Ahmed Iraqi
Barry Hunt
Jorge Morgado
David G. Lidzey
Abstract
The polymer poly(9,9-dioctylfluorene) (PF8) can be driven into a morphological form termed the β-phase that has enhanced planarity and increased structural rigidity. We show that the β-phase can be generated in two different fluorene oligomers; a fluorene pentamer, and a short (statistical) oligomer composed of chains having a maximum length of 19 monomer units. By comparing the energy of the zero-zero phonon line in fluorescence from the β-phase oligomers with that in the PF8 polymer, we show that the electronic conjugation length of the & beta-phase is (30 ±12) monomer-units, a value consistent with the persistence length of the molecular chain. © 2008 WILEY-VCH Verlag GmbH & . Co. KGaA.
Citation
Tsoi, W. C., Charas, A., Cadby, A. J., Khalil, G., Adawi, A. M., Iraqi, A., …Lidzey, D. G. (2008). Observation of the β-phase in two short-chain oligofluorenes. Advanced Functional Materials, 18(4), 600-606. https://doi.org/10.1002/adfm.200700530
Journal Article Type | Article |
---|---|
Online Publication Date | Feb 4, 2008 |
Publication Date | Feb 22, 2008 |
Journal | ADVANCED FUNCTIONAL MATERIALS |
Print ISSN | 1616-301X |
Electronic ISSN | 1616-3028 |
Publisher | Wiley |
Peer Reviewed | Peer Reviewed |
Volume | 18 |
Issue | 4 |
Pages | 600-606 |
DOI | https://doi.org/10.1002/adfm.200700530 |
Keywords | Structure-property relationships; Film morphology; Optical-spectra |
Public URL | https://hull-repository.worktribe.com/output/400136 |
Publisher URL | https://onlinelibrary.wiley.com/doi/abs/10.1002/adfm.200700530 |
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