Cartwright, L., Yi, H. and Iraqi, A. orcid.org/0000-0003-3060-6663 (2016) Effect of fluorination pattern and extent on the properties of PCDTBT derivatives. New Journal of Chemistry, 40 (2). pp. 1655-1662. ISSN 1144-0546
Abstract
Herein, we report the synthesis of a series of fluorinated dithienyl carbazole-alt-benzothiadiazoles (PCDTBT analogues) and the characterisation of their optical, electrochemical, thermal and molecular organisation in the solid state. The polymers were decorated with fluorine on either the benzothiadiazole unit, carbazole unit or both to yield PCDTffBT, PCffDTBT and PCffDTffBT, respectively. The copolymers displayed decomposition temperatures in excess of 350 1C. PCDTffBT, PCffDTBT and PCffDTffBT displayed optical band gaps of 1.86, 1.82 and 1.88 eV, respectively. It was speculated this was a consequence of the higher molecular weight of PCffDTBT relative to the other polymers. PCffDTBT and PCffDTffBT displayed shallower HOMO levels relative to PCDTffBT; a consequence of fluorinating the carbazole-donor moiety. XRD studies confirmed that fluorinating the benzothiadiazoleacceptor moiety improves molecular ordering by promoting p–p stacking of polymer backbones in solid state. Interestingly, fluorinating the carbazole-donor unit does not improve p–p stacking of polymer backbones.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | This journal is © The Royal Society of Chemistry and the Centre National de la Recherche Scientifique 2016. This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Science (Sheffield) > Department of Chemistry (Sheffield) |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 11 Jul 2016 15:46 |
Last Modified: | 11 Jul 2016 15:46 |
Published Version: | http://dx.doi.org/10.1039/C5NJ02394G |
Status: | Published |
Publisher: | Royal Society of Chemistry |
Refereed: | Yes |
Identification Number: | 10.1039/C5NJ02394G |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:101564 |