Advanced

An effect of side chain length on the solution structure of poly(9,9-dialkylfluorene)s in toluene

Knaapila, Matti LU ; Almasy, L; Garamus, V M; Ramos, M L; Justino, L L G; Galbrecht, F; Preis, E; Scherf, U; Burrows, H D and Monkman, A P (2008) In Polymer 49(8). p.2033-2038
Abstract
The effect of side chain length of pi-conjugated poly(9,9-dialkylfluorene)s has been studied in semi-dilute (10 mg/mL) toluene solutions using small-angle neutron scattering (SANS) and H-1 and H-2 NMR spectroscopies. Under these conditions, SANS data indicate that poly(9,9-dinonylfluorene) and poly(9,9-dioctylfluorene) are dissolved down to the molecule level and appear as elongated one-dimensional chains (length >20-30 nm). In contrast, the shorter side chain polymers exhibit a self-association so that poly(9,9-diheptylfluorene) forms thin sheet-like (similar to 1 nm) and poly(9,9-dihexylfluorene) thin (similar to 1 nm) and thick sheet-like (>6 nm) aggregates. H-1 NMR data, together with the density functional theory (DFT)... (More)
The effect of side chain length of pi-conjugated poly(9,9-dialkylfluorene)s has been studied in semi-dilute (10 mg/mL) toluene solutions using small-angle neutron scattering (SANS) and H-1 and H-2 NMR spectroscopies. Under these conditions, SANS data indicate that poly(9,9-dinonylfluorene) and poly(9,9-dioctylfluorene) are dissolved down to the molecule level and appear as elongated one-dimensional chains (length >20-30 nm). In contrast, the shorter side chain polymers exhibit a self-association so that poly(9,9-diheptylfluorene) forms thin sheet-like (similar to 1 nm) and poly(9,9-dihexylfluorene) thin (similar to 1 nm) and thick sheet-like (>6 nm) aggregates. H-1 NMR data, together with the density functional theory (DFT) calculations, however, show that this occurs without changes in the conformation of the polymer backbone. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
conjugated polymers, polyfluorene, solutions
in
Polymer
volume
49
issue
8
pages
2033 - 2038
publisher
Elsevier
external identifiers
  • wos:000255698400007
  • scopus:41549159198
ISSN
0032-3861
DOI
10.1016/j.polymer.2008.02.046
language
English
LU publication?
yes
id
db335234-3a51-457a-9f0f-453b36e3c040 (old id 1203567)
date added to LUP
2008-09-17 09:40:42
date last changed
2017-08-06 04:06:03
@article{db335234-3a51-457a-9f0f-453b36e3c040,
  abstract     = {The effect of side chain length of pi-conjugated poly(9,9-dialkylfluorene)s has been studied in semi-dilute (10 mg/mL) toluene solutions using small-angle neutron scattering (SANS) and H-1 and H-2 NMR spectroscopies. Under these conditions, SANS data indicate that poly(9,9-dinonylfluorene) and poly(9,9-dioctylfluorene) are dissolved down to the molecule level and appear as elongated one-dimensional chains (length >20-30 nm). In contrast, the shorter side chain polymers exhibit a self-association so that poly(9,9-diheptylfluorene) forms thin sheet-like (similar to 1 nm) and poly(9,9-dihexylfluorene) thin (similar to 1 nm) and thick sheet-like (>6 nm) aggregates. H-1 NMR data, together with the density functional theory (DFT) calculations, however, show that this occurs without changes in the conformation of the polymer backbone.},
  author       = {Knaapila, Matti and Almasy, L and Garamus, V M and Ramos, M L and Justino, L L G and Galbrecht, F and Preis, E and Scherf, U and Burrows, H D and Monkman, A P},
  issn         = {0032-3861},
  keyword      = {conjugated polymers,polyfluorene,solutions},
  language     = {eng},
  number       = {8},
  pages        = {2033--2038},
  publisher    = {Elsevier},
  series       = {Polymer},
  title        = {An effect of side chain length on the solution structure of poly(9,9-dialkylfluorene)s in toluene},
  url          = {http://dx.doi.org/10.1016/j.polymer.2008.02.046},
  volume       = {49},
  year         = {2008},
}