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

M. Knaapila, L. Almásy, V. M. Garamus, M. L. Ramos, L. L G Justino, F. Galbrecht, E. Preis, U. Scherf, H. D. Burrows, A. P. Monkman

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

The effect of side chain length of π-conjugated poly(9,9-dialkylfluorene)s has been studied in semi-dilute (10 mg/mL) toluene solutions using small-angle neutron scattering (SANS) and 1H and 2H 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 (∼1 nm) and poly(9,9-dihexylfluorene) thin (∼1 nm) and thick sheet-like (>6 nm) aggregates. 1H NMR data, together with the density functional theory (DFT) calculations, however, show that this occurs without changes in the conformation of the polymer backbone.

Original languageEnglish
Pages (from-to)2033-2038
Number of pages6
JournalPolymer (United Kingdom)
Volume49
Issue number8
DOIs
Publication statusPublished - Apr 15 2008

Fingerprint

Toluene
Neutron scattering
Chain length
Polymers
Nuclear magnetic resonance spectroscopy
Density functional theory
Conformations
Nuclear magnetic resonance
Association reactions
Molecules

Keywords

  • Conjugated polymers
  • Polyfluorene
  • Solutions

ASJC Scopus subject areas

  • Organic Chemistry
  • Polymers and Plastics

Cite this

Knaapila, M., Almásy, L., Garamus, V. M., Ramos, M. L., Justino, L. L. G., Galbrecht, F., ... Monkman, A. P. (2008). An effect of side chain length on the solution structure of poly(9,9-dialkylfluorene)s in toluene. Polymer (United Kingdom), 49(8), 2033-2038. https://doi.org/10.1016/j.polymer.2008.02.046

An effect of side chain length on the solution structure of poly(9,9-dialkylfluorene)s in toluene. / Knaapila, M.; Almásy, L.; Garamus, V. M.; Ramos, M. L.; Justino, L. L G; Galbrecht, F.; Preis, E.; Scherf, U.; Burrows, H. D.; Monkman, A. P.

In: Polymer (United Kingdom), Vol. 49, No. 8, 15.04.2008, p. 2033-2038.

Research output: Contribution to journalArticle

Knaapila, M, Almásy, L, Garamus, VM, Ramos, ML, Justino, LLG, Galbrecht, F, Preis, E, Scherf, U, Burrows, HD & Monkman, AP 2008, 'An effect of side chain length on the solution structure of poly(9,9-dialkylfluorene)s in toluene', Polymer (United Kingdom), vol. 49, no. 8, pp. 2033-2038. https://doi.org/10.1016/j.polymer.2008.02.046
Knaapila, M. ; Almásy, L. ; Garamus, V. M. ; Ramos, M. L. ; Justino, L. L G ; Galbrecht, F. ; Preis, E. ; Scherf, U. ; Burrows, H. D. ; Monkman, A. P. / An effect of side chain length on the solution structure of poly(9,9-dialkylfluorene)s in toluene. In: Polymer (United Kingdom). 2008 ; Vol. 49, No. 8. pp. 2033-2038.
@article{7547798045bf409cae3cb2d6292d4378,
title = "An effect of side chain length on the solution structure of poly(9,9-dialkylfluorene)s in toluene",
abstract = "The effect of side chain length of π-conjugated poly(9,9-dialkylfluorene)s has been studied in semi-dilute (10 mg/mL) toluene solutions using small-angle neutron scattering (SANS) and 1H and 2H 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 (∼1 nm) and poly(9,9-dihexylfluorene) thin (∼1 nm) and thick sheet-like (>6 nm) aggregates. 1H NMR data, together with the density functional theory (DFT) calculations, however, show that this occurs without changes in the conformation of the polymer backbone.",
keywords = "Conjugated polymers, Polyfluorene, Solutions",
author = "M. Knaapila and L. Alm{\'a}sy and Garamus, {V. M.} and Ramos, {M. L.} and Justino, {L. L G} and F. Galbrecht and E. Preis and U. Scherf and Burrows, {H. D.} and Monkman, {A. P.}",
year = "2008",
month = "4",
day = "15",
doi = "10.1016/j.polymer.2008.02.046",
language = "English",
volume = "49",
pages = "2033--2038",
journal = "Polymer",
issn = "0032-3861",
publisher = "Elsevier BV",
number = "8",

}

TY - JOUR

T1 - An effect of side chain length on the solution structure of poly(9,9-dialkylfluorene)s in toluene

AU - Knaapila, M.

AU - Almásy, L.

AU - Garamus, V. M.

AU - Ramos, M. L.

AU - Justino, L. L G

AU - Galbrecht, F.

AU - Preis, E.

AU - Scherf, U.

AU - Burrows, H. D.

AU - Monkman, A. P.

PY - 2008/4/15

Y1 - 2008/4/15

N2 - The effect of side chain length of π-conjugated poly(9,9-dialkylfluorene)s has been studied in semi-dilute (10 mg/mL) toluene solutions using small-angle neutron scattering (SANS) and 1H and 2H 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 (∼1 nm) and poly(9,9-dihexylfluorene) thin (∼1 nm) and thick sheet-like (>6 nm) aggregates. 1H NMR data, together with the density functional theory (DFT) calculations, however, show that this occurs without changes in the conformation of the polymer backbone.

AB - The effect of side chain length of π-conjugated poly(9,9-dialkylfluorene)s has been studied in semi-dilute (10 mg/mL) toluene solutions using small-angle neutron scattering (SANS) and 1H and 2H 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 (∼1 nm) and poly(9,9-dihexylfluorene) thin (∼1 nm) and thick sheet-like (>6 nm) aggregates. 1H NMR data, together with the density functional theory (DFT) calculations, however, show that this occurs without changes in the conformation of the polymer backbone.

KW - Conjugated polymers

KW - Polyfluorene

KW - Solutions

UR - http://www.scopus.com/inward/record.url?scp=41549159198&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=41549159198&partnerID=8YFLogxK

U2 - 10.1016/j.polymer.2008.02.046

DO - 10.1016/j.polymer.2008.02.046

M3 - Article

VL - 49

SP - 2033

EP - 2038

JO - Polymer

JF - Polymer

SN - 0032-3861

IS - 8

ER -