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Cationic polyfluore...
Cationic polyfluorene : conformation and aggregation in a "good" solvent
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- Wågberg, Thomas, 1971- (författare)
- Umeå universitet,Institutionen för fysik,Material och Nanofysik
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- Liu, Bin (författare)
- Natl Univ Singapore, Dept Chem & Biomol Engn
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- Orädd, Greger (författare)
- Umeå universitet,Kemiska institutionen
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- Eliasson, Bertil (författare)
- Umeå universitet,Kemiska institutionen
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- Edman, Ludvig (författare)
- Umeå universitet,Institutionen för fysik
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(creator_code:org_t)
- OXFORD, ENGLAND : PERGAMON-ELSEVIER SCIENCE LTD, 2009
- 2009
- Engelska.
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Ingår i: European Polymer Journal. - OXFORD, ENGLAND : PERGAMON-ELSEVIER SCIENCE LTD. - 0014-3057 .- 1873-1945. ; 45:11, s. 3228-3233
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- The conjugated polyelectrolyte (CPE) poly{9,9'-bis[6 ''-(N,N,N-trimethylammonium)-hexylfluorene-alt-co-phenylene] dibromide} (PFPN+Br-) demonstrates a high solubility in methanol in comparison to other more hydrophilic or hydrophobic solvents. We have employed a combination of pulsed-field-gradient-NMR, photoluminescence (PL), and Raman spectroscopy to establish the conformation and aggregation behavior of PFPN+Br- in methanol, with the aim to attain information on how to design CPEs with a high solubility in a preferred solvent. We find that the diffusion coefficient and PL spectrum of PFPN+Br-, as well as the Raman-active methyl rocking mode of methanol, all exhibit a strong dependence on PFPN+Br- concentration. We rationalize our findings with a model in which PFPN+Br- forms aggregates via ∏-∏ interactions between main-chain segments, while the ionic side chains are surrounded and electrostatically screened by the methanol solvent. Accordingly, the notably high solubility of PFPN+Br- in methanol is rationalized by favorable interactions between the ionic side chains and the methanol molecules. We propose that an appropriate design of a high-solubility CPE should consider a matching of the mixed hydrophobic/hydrophilic character of the ionic side chain with that of the preferred solvent.
Ämnesord
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
Nyckelord
- SOLUBLE CONJUGATED POLYMERS; EMITTING ELECTROCHEMICAL-CELL; DUAL ELECTROLUMINESCENCE; HIGH-EFFICIENCY; DNA DETECTION; LIGHT; POLYELECTROLYTES; FLUORESCENCE; DEVICES; SPECTROSCOPY
- Macromolecular physics
- Makromolekylfysik
- fysik
- Physics
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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